# cleanweb.tools — full content index > A curated collection of 100% free utility tools for web developers, UX designers, and marketers. Everything runs in your browser — no uploads, no accounts, no tracking. Homepage: https://cleanweb.tools Tools hub: https://cleanweb.tools/tools Sitemap: https://cleanweb.tools/sitemap.xml --- # Developer Index: https://cleanweb.tools/tools/category/developer ## JSON Formatter & Validator URL: https://cleanweb.tools/tools/json-formatter Tags: json, formatter, validator, api, developer Paste any JSON payload — from a REST API response, a log line, or a config file — and this formatter will pretty-print it with two-space indentation, surface the exact line and column of the first syntax error, and let you minify it again for production use. Everything runs locally in your browser, so responses containing secrets, PII, or production data never leave your machine. Handy when you're debugging a webhook at 2 a.m., diffing two API versions, embedding compact JSON into a shell command, or just making a 4000-character single-line blob human-readable. Trailing commas, unquoted keys, and single-quoted strings are flagged the same way Node's strict parser sees them, so what validates here will validate in your app. ### Features - Format and beautify JSON with proper indentation - Validate JSON syntax and pinpoint errors instantly - Minify JSON for production use - Copy formatted or minified output to clipboard ### How to use 1. Paste your JSON data into the input field 2. Click "Format" to beautify or "Minify" to compress 3. Review validation status and any error messages 4. Copy the result using the copy button ### FAQ **Q: Is my JSON sent to a server?** A: No. Formatting, validation, and minification all run in your browser via the native JSON parser. Nothing is uploaded, logged, or stored on our side, which makes it safe to paste payloads that include API keys, tokens, or customer data. **Q: Why does my JSON say "Unexpected token" when it looks fine?** A: Strict JSON forbids trailing commas, single-quoted strings, unquoted object keys, and JavaScript-style comments. The error position we show is the first character the parser couldn't accept — usually the comma before a closing brace or a key written without double quotes. **Q: Does minifying change the meaning of my JSON?** A: No. Minification only strips insignificant whitespace between tokens. Keys, values, numeric precision, and array order are preserved exactly, so the minified output is byte-for-byte equivalent to the formatted version once both are re-parsed. **Q: Can I format huge JSON files?** A: The formatter handles multi-megabyte payloads fine on a modern laptop, but the browser UI can get sluggish past ~10 MB. For logs or database exports larger than that, prefer a streaming CLI tool like jq. --- ## CSS Minifier URL: https://cleanweb.tools/tools/css-minifier Tags: css, minify, compress, optimization, performance Strip every byte your browser doesn't need — comments, trailing semicolons, redundant whitespace, and the blank lines that make authored CSS readable but ship overhead. Useful when you're inlining critical CSS into a transactional email, packing styles into a one-file HTML snippet, hand-optimising an above-the-fold block that bypasses your bundler, or just seeing how much weight your stylesheet carries without its indentation. The tool preserves every declaration, selector, and cascade order exactly as authored — the rendered result is byte-for-byte identical to the original, just smaller. You'll see the compression ratio after each run so you can tell at a glance whether a stylesheet is already lean or still has a lot of redundancy. Everything runs locally: we never see your styles, which matters for unreleased product CSS. ### Features - Minify CSS by removing whitespace and comments - Track compression ratio and file size savings - Preserve CSS functionality while reducing size - Copy minified output to clipboard ### How to use 1. Paste your CSS code into the input field 2. Click "Minify" to compress the CSS 3. Review the compression ratio and size savings 4. Copy the minified CSS for production use ### FAQ **Q: Do I still need to minify if my site is served with gzip or Brotli?** A: It still helps, but the gain is smaller. Gzip already compresses repeated whitespace and common tokens well, so minified + gzipped is typically 5–15% smaller than original + gzipped — worth it on critical path CSS, marginal on already-bundled stylesheets. **Q: Will minifying break my CSS?** A: No — minification only removes insignificant whitespace and comments. Selectors, specificity, and cascade order are preserved exactly. The one thing to double-check is that you haven't relied on a comment as a feature flag; once minified, /* keep */ markers are gone. **Q: How is this different from what my build tool does?** A: Webpack, esbuild, and Lightning CSS also minify in production builds. This tool is for the cases where you don't have that pipeline — email templates, one-off HTML files, quick copy-paste into a CMS, or inlining critical CSS into a head tag. --- ## UUID Generator URL: https://cleanweb.tools/tools/uuid-generator Tags: uuid, guid, unique id, generator, developer Generate one UUID or a batch of a few hundred at once — each produced by the browser's crypto.randomUUID(), so the bytes come from a cryptographically secure random source, not a weak Math.random fallback. UUID v4 gives you 122 bits of entropy, which is enough collision resistance that two independent services can generate IDs without coordinating. Useful when you're seeding a database, writing a migration that needs fixed example IDs, stubbing a mock API, generating idempotency keys for a payment integration, or tagging test events so you can trace them through a pipeline. Every UUID here matches RFC 4122 version 4 exactly — you can feed them directly into Postgres uuid columns, Node crypto APIs, or any library that validates the version nibble. No network call, no rate limit. ### Features - Generate cryptographically random UUID v4 identifiers - Create single or bulk UUIDs at once - Copy individual or all UUIDs to clipboard - Compliant with RFC 4122 standard ### How to use 1. Click "Generate" to create a new UUID 2. Set the quantity for bulk generation 3. Click any UUID to copy it to your clipboard 4. Use the generated UUIDs in your applications ### FAQ **Q: Is UUID v4 actually unique?** A: Not mathematically guaranteed, but practically yes. With 122 random bits, you'd need to generate ~2.7 × 10^18 UUIDs before a collision becomes likely. You will run out of database rows or hit the heat death of the universe first, so treat them as unique in any real application. **Q: Should I use UUID v4 or v7 for database primary keys?** A: v4 is fine for most apps, but v7 is time-ordered, which keeps b-tree indexes tight and makes newly inserted rows cluster together on disk. If you're generating millions of IDs and care about insert performance, prefer v7 (not yet offered here). For everything else, v4 is the simple default. **Q: Are these IDs safe to expose in URLs?** A: Yes — v4 UUIDs are unguessable and reveal nothing about when or where they were generated, unlike auto-increment integers. That makes them a reasonable choice for share links and public object IDs, though they're not a substitute for authorisation checks. **Q: Why do the UUIDs I generate always start with the same-ish pattern?** A: They don't — but the 13th character is always "4" (the version) and the 17th is always 8, 9, a, or b (the variant). Those are fixed by the RFC, not a weakness in the randomness. Everything else is genuinely random. --- ## Regex Tester URL: https://cleanweb.tools/tools/regex-tester Tags: regex, regular expression, pattern, testing, developer Iterate on a regular expression against real sample text and see every match highlighted the instant you change the pattern. Useful when you're cleaning a log file in a hurry, writing an input-validation rule, reaching for a capture group inside sed, or trying to remember whether \d matches just ASCII digits or every Unicode digit class. The tester uses the same ECMAScript regex engine as your JavaScript runtime, with toggles for the common flags — global (g), case-insensitive (i), multiline (m), dotall (s), unicode (u), and sticky (y) — so what matches here will match in your Node.js or browser code. Capture groups are numbered and, if named, called out by name. No server round-trip: paste production-like data without worrying about it being logged, even when that data is full of PII. ### Features - Test regular expressions with real-time matching - See highlighted matches in your test string - Support for common regex flags (global, case-insensitive, multiline) - Instant feedback as you type your pattern ### How to use 1. Enter your regular expression pattern 2. Type or paste a test string to match against 3. Select the regex flags you need 4. View highlighted matches and capture groups ### FAQ **Q: Do JavaScript regexes match the same way as Python or PCRE?** A: Mostly, but not exactly. JS lacks look-behind support in some older engines (fine in modern Chromium/Firefox/Safari), uses \b a little differently with Unicode, and treats \d as ASCII-only unless you pass the u flag. Test against the engine you'll run in production. **Q: Why does my pattern match more than I expected?** A: Regex quantifiers default to greedy — they consume as many characters as possible. Add a ? after the + or * (e.g., .*?) for a lazy match, or anchor the pattern with \b word boundaries. The "highlight every match" view makes over-matching obvious at a glance. **Q: What does the u flag actually do?** A: It switches the engine into Unicode mode: \u{…} escapes become legal, \d and \w stay ASCII (unless you combine with the v flag), surrogate pairs are treated as a single code point, and invalid escapes throw instead of being silently ignored. Turn it on for anything that touches non-ASCII text. **Q: Should I use regex to parse HTML or JSON?** A: No — HTML and JSON are context-free; regex is not. Use a proper parser (DOMParser for HTML, JSON.parse for JSON). Regex is right for flat, line-oriented text: log lines, CSV fields you already know are simple, filename patterns, identifier validation. --- ## Password Generator URL: https://cleanweb.tools/tools/password-generator Tags: password, security, generator, random, secure Produce strong passwords using the browser's cryptographically secure random generator (crypto.getRandomValues), not the weak Math.random fallback many ad-hoc generators still rely on. Dial in the length (16+ recommended for anything sensitive), toggle lowercase, uppercase, digits, and symbols, and generate one or a batch of passwords to rotate across several accounts at once. Every password is generated locally; we never see it, we don't log it, we don't transmit it — which matters because password managers are the only safe place for a new credential to land, and a browser tab is a brief stop on the way. Useful when you're creating a new service account, rotating a leaked credential, seeding a dev environment, or handing a fresh password to a teammate through your team's secret-sharing tool. ### Features - Generate cryptographically secure random passwords - Customize password length and character types - Include uppercase, lowercase, numbers, and symbols - Generate multiple passwords at once ### How to use 1. Set your desired password length using the slider 2. Toggle character types (uppercase, lowercase, numbers, symbols) 3. Click "Generate" to create secure passwords 4. Click any password to copy it to your clipboard ### FAQ **Q: Are the passwords really generated in my browser?** A: Yes. The generator calls window.crypto.getRandomValues, which pulls entropy from the operating system's CSPRNG. No password is sent to a server, logged, or even stored in localStorage — reload the page and every value is gone. **Q: How long should my password be?** A: 16 characters with mixed case, digits, and symbols is a sensible floor for web services. 20+ is reasonable for anything important (bank, email, password-manager master). Length matters more than symbol variety — a 20-character lowercase passphrase beats a 10-character "h@Xx0r!" pattern. **Q: Can I trust a random-looking password more than a passphrase?** A: Only if you use a password manager. Humans can't remember Jf$7k!9pQz… which means it ends up written on a sticky note. For accounts you must type manually, a four- or five-word diceware passphrase is both memorable and brute-force-resistant. **Q: Should I reuse the same generator settings for every site?** A: It's fine — what matters is that each site gets a unique password, not that each site uses a different character set. Pick one comfortable setting (e.g., 20 chars with symbols) and generate a fresh password per service, then store them all in a password manager. --- ## HTML Entity Encoder URL: https://cleanweb.tools/tools/html-entity-encoder Tags: html, entities, encode, decode, web Encode special characters like <, >, &, and quotes into their HTML entity equivalents for safe display in web pages. Decode HTML entities back to their original characters. ### Features - Convert special characters to HTML entities - Decode HTML entities back to original characters - Handle all standard HTML entity references - Copy converted output to clipboard ### How to use 1. Paste text containing special characters into the input 2. Select "Encode" to convert to HTML entities or "Decode" to reverse 3. View the converted output instantly 4. Copy the result for use in your HTML pages --- ## Hash Generator URL: https://cleanweb.tools/tools/hash-generator Tags: hash, md5, sha, security, crypto Generate cryptographic hashes from text input using various algorithms including MD5, SHA-1, SHA-256, and SHA-512. Useful for verifying data integrity and security applications. ### Features - Generate MD5, SHA-1, SHA-256, and SHA-512 hashes - Hash any text input in real-time - Compare hash outputs across multiple algorithms - Copy hash values to clipboard ### How to use 1. Enter or paste your text into the input field 2. View hash values generated across all algorithms 3. Click any hash value to copy it to your clipboard 4. Use the hashes for data integrity verification --- # Designer Index: https://cleanweb.tools/tools/category/designer ## Color Picker & Converter URL: https://cleanweb.tools/tools/color-picker Tags: color, hex, rgb, hsl, palette, design Dial in a colour with a visual picker and instantly see it rendered in every format you're likely to paste somewhere — 3- and 6-digit HEX, RGB, RGBA, HSL, and HSLA. Useful when a designer hands you a Figma palette in HEX but your chart library wants RGB, when you're matching a brand colour pulled from a screenshot, or when you need to nudge an HSL hue to a slightly darker shade without reaching for Photoshop. The picker runs entirely client-side, so unreleased brand colours don't get logged anywhere. Copy any representation to the clipboard with one click, tweak hue, saturation, and lightness independently, and keep a running preview so you can eyeball contrast before committing the change to your stylesheet. ### Features - Pick any color with an interactive color wheel - Convert between HEX, RGB, and HSL formats - Copy color codes to clipboard in any format - Real-time preview of selected colors ### How to use 1. Use the color picker to select your desired color 2. View the color value in HEX, RGB, and HSL formats 3. Click any color code to copy it to your clipboard 4. Adjust hue, saturation, and lightness as needed ### FAQ **Q: Which colour format should I use in CSS?** A: For most modern projects, HSL is easier to reason about (the numbers map to hue, saturation, and lightness), while HEX is shorter in shared snippets. RGBA and HSLA let you set transparency. Pick whichever keeps your stylesheet readable — browsers render them identically. **Q: Why does the HEX value have eight characters?** A: Eight-character HEX (e.g. #112233FF) includes an alpha channel — the last two characters encode transparency from 00 (invisible) to FF (fully opaque). Strip them if you only need the six-character opaque form. **Q: Do I need to worry about colour spaces like P3 or OKLCH?** A: Not for standard web work. The picker stays in sRGB, which is what every browser, CSS value, and design tool assumes by default. Wide-gamut spaces like Display-P3 matter for high-end photography and cinema, not typical UI work. **Q: Is this accessible? Does it check contrast?** A: The picker shows you the colour, but it doesn't yet score WCAG contrast. For now, pair it with a dedicated contrast tool to verify text readability against your chosen background — especially for body copy and interactive elements. --- ## Box Shadow Generator URL: https://cleanweb.tools/tools/box-shadow-generator Tags: css, box shadow, design, visual, generator Design beautiful CSS box shadows with an intuitive visual editor. Adjust horizontal and vertical offset, blur, spread, color, and opacity. Copy the generated CSS code instantly. ### Features - Visual editor for CSS box shadow properties - Adjust offset, blur, spread, color, and opacity - Support for multiple shadows and inset shadows - Copy generated CSS code instantly ### How to use 1. Use the sliders to adjust shadow properties 2. Set horizontal and vertical offset, blur, and spread 3. Choose shadow color and opacity 4. Copy the CSS code and paste it into your stylesheet --- ## CSS Gradient Generator URL: https://cleanweb.tools/tools/gradient-generator Tags: css, gradient, design, colors, generator Design stunning CSS gradients with an easy-to-use visual editor. Create linear or radial gradients, add multiple color stops, adjust angles, and copy the generated CSS code. ### Features - Create linear and radial CSS gradients visually - Add and customize multiple color stops - Adjust gradient angle and direction - Copy the generated CSS gradient code ### How to use 1. Choose between linear or radial gradient type 2. Add color stops and adjust their positions 3. Set the gradient angle or direction 4. Copy the CSS code for your project --- ## Aspect Ratio Calculator URL: https://cleanweb.tools/tools/aspect-ratio-calculator Tags: aspect ratio, dimensions, resize, image, video Calculate aspect ratios, resize dimensions while maintaining proportions, and convert between common ratios like 16:9, 4:3, and 1:1. Essential for designers working with images, videos, and responsive layouts. ### Features - Calculate aspect ratios from width and height - Resize dimensions while maintaining proportions - Common presets for 16:9, 4:3, 1:1, and more - Perfect for responsive design and media sizing ### How to use 1. Enter the width and height of your image or video 2. View the calculated aspect ratio 3. Enter a new width or height to resize proportionally 4. Use preset ratios for common media formats --- ## Favicon Generator URL: https://cleanweb.tools/tools/favicon-generator Tags: favicon, icon, website, branding, generator Generate favicons in multiple sizes from any image. Create ICO files and PNG icons for different devices and browsers. Preview how your favicon will look in browser tabs. ### Features - Generate favicons from any image or SVG - Create multiple sizes for different devices - Preview how favicons look in browser tabs - Customize with rounded corners, backgrounds, and tinting ### How to use 1. Upload an image or SVG file 2. Customize the favicon appearance with styling options 3. Preview the favicon in a simulated browser tab 4. Download the generated favicon files --- # Marketing Index: https://cleanweb.tools/tools/category/marketing ## Word & Character Counter URL: https://cleanweb.tools/tools/word-counter Tags: word count, character count, seo, content, writing A comprehensive text analysis tool that counts words, characters (with and without spaces), sentences, and paragraphs. Track reading time estimates and get detailed statistics about your content. Perfect for writers, marketers, and SEO specialists. ### Features - Count words, characters, sentences, and paragraphs - Track characters with and without spaces - Estimate reading time for your content - Real-time counting as you type ### How to use 1. Paste or type your text into the input area 2. View word, character, sentence, and paragraph counts instantly 3. Check the estimated reading time 4. Use the stats for SEO optimization or content planning --- ## Meta Tag Generator URL: https://cleanweb.tools/tools/meta-tag-generator Tags: meta tags, seo, open graph, twitter cards, marketing Fill in your page's title, description, canonical URL, and share image once, and get a complete head-ready block covering the basic SEO pair, the Open Graph cluster (og:title, og:description, og:image, og:url, og:type), and the Twitter Card variant — so your link renders correctly in Google SERPs, LinkedIn previews, Slack unfurls, iMessage, and X cards without you having to remember which platform expects which tag. A live preview shows how the result will look in a Google snippet and a generic social card, with character-count hints so titles and descriptions don't get truncated mid-sentence. Handy when you're shipping a static landing page without a framework, adding meta tags to a CMS template that doesn't have an SEO plugin, or sanity-checking what a hand-written Next.js generateMetadata is emitting. ### Features - Generate title and description meta tags - Create Open Graph tags for social media sharing - Generate Twitter Card meta tags - Preview how your page appears in search results ### How to use 1. Enter your page title and description 2. Fill in Open Graph and Twitter Card fields 3. Preview the search result and social media appearance 4. Copy the generated HTML meta tags to your page ### FAQ **Q: How long should my meta description be?** A: Aim for 120–160 characters. Google truncates most snippets around 155–160 on desktop and shorter on mobile. Write a complete sentence that invites a click — keyword stuffing no longer helps, since Google frequently rewrites descriptions based on query intent anyway. **Q: Do I still need Twitter Card tags if I already have Open Graph?** A: For most cases no — X falls back to Open Graph when Twitter Card tags are missing. You only need explicit twitter:card tags when you want a different card variant (summary vs summary_large_image) than your og:image would otherwise trigger. **Q: What's the right og:image size?** A: 1200×630 is the universally safe size: it satisfies X large card, LinkedIn, Facebook, and Slack. Keep any text inside the inner 1000×500 safe zone so nothing gets cropped on smaller previews, and keep the file under 1 MB so scrapers don't time out. **Q: Does my page need a canonical tag?** A: Yes, if the same page is reachable via multiple URLs (with/without trailing slash, different query parameters, paginated views). A self-referencing canonical also helps on sites with no duplicates because it gives Google an unambiguous preferred URL to index. --- ## UTM Link Builder URL: https://cleanweb.tools/tools/utm-builder Tags: utm, tracking, analytics, campaign, marketing Build UTM-tagged URLs to track your marketing campaigns in Google Analytics. Add source, medium, campaign, term, and content parameters to any URL for accurate attribution tracking. ### Features - Build UTM-tagged URLs for Google Analytics tracking - Add source, medium, campaign, term, and content parameters - Validate and preview the final tagged URL - Copy the complete UTM link to clipboard ### How to use 1. Enter the destination URL for your campaign 2. Fill in UTM parameters: source, medium, and campaign name 3. Optionally add term and content parameters 4. Copy the generated UTM link for your campaign --- ## QR Code Generator URL: https://cleanweb.tools/tools/qr-code-generator Tags: qr code, generator, barcode, marketing, share Turn a URL, a Wi-Fi credential, a contact card, or any short string into a QR code you can print, share on a slide, or embed in a flyer. The generator defaults to high error-correction (level H), which means the code stays scannable even if a logo overlay or a coffee stain covers up to 30% of the surface — handy for posters, restaurant menus, and tickets that will live in the real world. Tweak foreground and background colours to match brand guidelines (just keep enough contrast — faded grey on white stops scanning fast), and download the result as a PNG in the exact pixel size your design needs. Everything is rendered locally, so internal links you wouldn't want a third-party QR service to log stay private. Useful for product packaging, event badges, restaurant tables, and anywhere a user needs to pick up a URL without typing it. ### Features - Generate QR codes from text, URLs, or any data - Customize QR code colors and size - Download QR codes as PNG images - Instant preview as you type ### How to use 1. Enter the text, URL, or data to encode 2. Customize the QR code colors if desired 3. Preview the generated QR code 4. Download the QR code image for use ### FAQ **Q: Can someone track who scans a QR code I generate here?** A: Not through this tool — the code you download points directly to whatever URL you entered, with no redirect, analytics, or tracking parameter in the middle. If you want per-scan analytics, encode a short-link from a service like Bitly instead of the final URL. **Q: What size should I export my QR code at?** A: A good rule: the printed size in millimetres should be at least 10× the scanning distance in metres. So a sign read from 2 m away needs at least a 20 mm square. Pixel resolution matters less — a 600×600 PNG prints crisply at any business-card size. **Q: Can I put my logo in the middle of the QR code?** A: Yes, within reason. Keep the logo under about 20% of the code's total area and keep it centred, so the redundant error-correction bytes can still reconstruct the missing modules. Oversized or off-centre overlays eat into the data and start breaking scans on older phones. **Q: Why use a QR code instead of just writing the URL?** A: They shave seconds off the handoff — no typing, no autocorrect mangling the domain. They're especially good for URLs with UTM tags or auth tokens no user would ever type correctly, and for offline-to-online flows like posters, packaging, and receipts. --- ## URL Slug Generator URL: https://cleanweb.tools/tools/slug-generator Tags: slug, url, seo, permalink, generator Transform any text into clean, SEO-friendly URL slugs. Removes special characters, converts spaces to hyphens, and handles unicode characters. Essential for content management and blog posts. ### Features - Convert any text into clean URL-friendly slugs - Remove special characters and handle unicode - Convert spaces to hyphens automatically - Copy the generated slug to clipboard ### How to use 1. Type or paste your title or text into the input 2. View the generated slug in real-time 3. Adjust settings if needed for custom separators 4. Copy the slug for use in your CMS or website --- ## Social Preview Generator URL: https://cleanweb.tools/tools/social-previews Tags: social media, preview, mockup, screenshot, og image, twitter Generate stunning social media preview images by placing your website screenshots in a sleek MacBook-style laptop frame. Choose from beautiful gradient backgrounds, select the perfect size for Twitter, LinkedIn, Facebook, and more. Export as high-quality PNG for your social sharing needs. ### Features - Create social media preview images with laptop mockups - Choose from beautiful gradient backgrounds - Select preset sizes for Twitter, LinkedIn, and Facebook - Export as high-quality PNG images ### How to use 1. Upload a screenshot of your website or app 2. Select a background style and size preset 3. Preview the mockup with your screenshot 4. Export and download the image for social media --- # Text & Content Index: https://cleanweb.tools/tools/category/text ## Lorem Ipsum Generator URL: https://cleanweb.tools/tools/lorem-ipsum-generator Tags: lorem ipsum, placeholder, text, content, mockup Produce classical Lorem Ipsum filler in the exact shape your mockup needs — a three-word headline, a single 20-word sentence, a three-paragraph article body, or a long scroll for stress-testing scroll-restoration logic. The generator is deliberately boring: the same Lorem Ipsum corpus every other design tool uses, so stakeholders immediately recognise it as placeholder instead of confusing it for real copy. Paragraph length varies naturally so type-set mockups don't look suspiciously uniform. Handy for Figma exports that need longer text than the plugin provides, React components wired up before the copywriter is ready, email templates being QA'd for line-wrap behaviour, and CMS seeds that need hundreds of dummy entries. No API calls, no rate limits — generate as much or as little as you like. ### Features - Generate paragraphs, sentences, or words of placeholder text - Customize the amount of text generated - Copy generated text to clipboard instantly - Standard Lorem Ipsum text for professional mockups ### How to use 1. Select the type of text output: paragraphs, sentences, or words 2. Set the desired quantity 3. Click "Generate" to create placeholder text 4. Copy the result to use in your designs ### FAQ **Q: Where does Lorem Ipsum actually come from?** A: It's a scrambled passage from Cicero's De finibus bonorum et malorum, written around 45 BC. A typesetter in the 1500s reshuffled the words into the nonsense block designers have used as placeholder text ever since — exactly because it reads as text-shaped but nobody mistakes it for meaning. **Q: Should I ever ship a site with Lorem Ipsum?** A: No — search engines will index it, and real users will see it if a CMS field goes missing. Treat it as pre-production scaffolding only. Before launch, replace every instance with real copy and grep the codebase for "lorem" to be sure nothing slipped through. **Q: Does Lorem Ipsum work for non-Latin scripts?** A: Not really. It tests glyph width and line-height for Latin scripts but tells you nothing about how Cyrillic, Arabic, CJK, or Indic fonts will wrap. For those, use a language-appropriate placeholder — "текст-рыба" for Russian, 龍虎山 patterns for Chinese, etc. --- ## Markdown Preview URL: https://cleanweb.tools/tools/markdown-preview Tags: markdown, preview, editor, documentation, readme A live Markdown editor and previewer that renders your Markdown content in real-time. Perfect for writing documentation, README files, blog posts, and any content that uses Markdown formatting. ### Features - Live Markdown rendering as you type - Support for headings, lists, links, images, and code blocks - Side-by-side editor and preview layout - Copy rendered HTML or raw Markdown ### How to use 1. Type or paste Markdown content in the editor 2. View the rendered preview in real-time 3. Use the toolbar for common formatting shortcuts 4. Copy the output for your documentation or blog --- ## Text Case Converter URL: https://cleanweb.tools/tools/case-converter Tags: text, case, convert, uppercase, lowercase Transform text between various cases including uppercase, lowercase, title case, sentence case, camelCase, snake_case, and kebab-case. Perfect for developers and content creators. ### Features - Convert text to uppercase, lowercase, or title case - Support for camelCase, snake_case, and kebab-case - Sentence case and other formatting options - Copy converted text to clipboard instantly ### How to use 1. Paste or type your text into the input area 2. Click the desired case conversion button 3. View the converted text in the output area 4. Copy the result using the copy button --- ## Text Diff Checker URL: https://cleanweb.tools/tools/diff-checker Tags: diff, compare, text, changes, code review Compare two blocks of text side-by-side and see exactly what changed. Highlights additions, deletions, and modifications. Perfect for code reviews, document comparison, and version tracking. ### Features - Compare two blocks of text side-by-side - Highlight additions, deletions, and modifications - Line-by-line or inline diff view - Perfect for code reviews and document comparison ### How to use 1. Paste the original text in the left panel 2. Paste the modified text in the right panel 3. View highlighted differences between the two texts 4. Use the diff output for code reviews or change tracking --- # Converters Index: https://cleanweb.tools/tools/category/converter ## Base64 Encoder & Decoder URL: https://cleanweb.tools/tools/base64-encoder-decoder Tags: base64, encode, decode, converter, developer Convert between plain text (or binary) and Base64 without switching to a terminal. Useful when you need to drop a tiny SVG straight into a CSS background-image rule, decode a JWT payload to peek at its claims, unpack an email MIME part, or generate a Basic-Auth header from "user:pass" without reaching for btoa in the dev console. UTF-8 is handled correctly, so emoji, accented characters, and non-Latin scripts round-trip exactly — no double-encoded mojibake. The whole conversion happens in your browser, which matters when the string you're decoding is someone's session token or an Authorization header. Paste, toggle encode or decode, copy the result. Works on strings up to several megabytes; for larger binary files, use the CLI. ### Features - Encode text to Base64 format instantly - Decode Base64 strings back to plain text - Handle UTF-8 characters correctly - Copy encoded or decoded output to clipboard ### How to use 1. Paste your text or Base64 string into the input field 2. Select "Encode" or "Decode" mode 3. View the converted result instantly 4. Copy the output using the copy button ### FAQ **Q: What's the difference between Base64 and base64url?** A: Standard Base64 uses + and / as the 63rd and 64th characters and = for padding. base64url (RFC 4648 §5) swaps those for - and _ and usually drops the padding, so the output is safe to drop into URLs, filenames, and JWT parts without escaping. **Q: Is Base64 encryption?** A: No. Base64 is a 1:1 reversible encoding anyone can decode — treat the output as "plain text dressed up as ASCII", not as a secret. If you're encoding a password or API token, the token is still the secret; Base64 just makes it transport-safe. **Q: Why is my Base64 output 33% longer than the input?** A: Base64 represents every 3 bytes of input as 4 printable ASCII characters — a fixed 4/3 expansion, plus up to 2 padding characters. That's the price of going from an 8-bit alphabet to a 6-bit one; it's expected, not a bug. **Q: Can I Base64-encode a binary file here?** A: For text and short binary blobs yes, but for real file conversion use the Image-to-Base64 tool (for images) or a CLI like `base64 < file.bin` for large binaries — pasting a 50 MB file into a textarea won't end well. --- ## URL Encoder & Decoder URL: https://cleanweb.tools/tools/url-encoder-decoder Tags: url, encode, decode, uri, web Encode special characters in URLs for safe transmission over the internet, or decode encoded URLs back to readable format. Essential for working with query strings, API parameters, and web development. ### Features - Encode special characters for safe URL transmission - Decode percent-encoded URLs back to readable text - Handle all special and unicode characters - Copy encoded or decoded output instantly ### How to use 1. Paste your URL or text into the input field 2. Select "Encode" or "Decode" mode 3. View the result instantly 4. Copy the output using the copy button --- ## Timestamp Converter URL: https://cleanweb.tools/tools/timestamp-converter Tags: timestamp, unix, date, time, converter Convert Unix timestamps to human-readable date formats and vice versa. Support for various date formats, timezones, and instant conversion. Essential for developers working with APIs and databases. ### Features - Convert Unix timestamps to human-readable dates - Convert dates to Unix timestamp format - Support for multiple date formats and timezones - View the current timestamp in real-time ### How to use 1. Enter a Unix timestamp or select a date 2. View the converted result in the other format 3. Choose your preferred date format and timezone 4. Copy the converted value to clipboard --- ## Image to Base64 URL: https://cleanweb.tools/tools/image-to-base64 Tags: image, base64, data url, embed, converter Convert images to Base64 encoded data URLs that can be embedded directly in HTML, CSS, or JavaScript. Supports PNG, JPG, GIF, and other common image formats. ### Features - Convert PNG, JPG, GIF, and other images to Base64 - Generate data URLs for embedding in HTML and CSS - Preview uploaded images before conversion - Copy the Base64 data URL to clipboard ### How to use 1. Upload an image file using the file picker or drag and drop 2. View the image preview and file details 3. Copy the Base64 data URL from the output 4. Paste the data URL directly in your HTML or CSS --- ## JSON to CSV Converter URL: https://cleanweb.tools/tools/json-to-csv Tags: json, csv, converter, data, spreadsheet Transform JSON arrays into CSV spreadsheet format or convert CSV files back to JSON. Handle nested objects, customize delimiters, and download results. Perfect for data migration and analysis. ### Features - Convert JSON arrays to CSV spreadsheet format - Convert CSV data back to JSON format - Handle nested objects and complex data structures - Download converted data as a file ### How to use 1. Paste your JSON or CSV data into the input field 2. Select the conversion direction (JSON to CSV or CSV to JSON) 3. View the converted output instantly 4. Copy or download the result ---