# cleanweb.tools

> 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.

- Sitemap: https://cleanweb.tools/sitemap.xml
- Full index: https://cleanweb.tools/llms-full.txt

## Developer

- [JSON Formatter & Validator](https://cleanweb.tools/tools/json-formatter): Format, validate, and beautify your JSON data instantly.
- [CSS Minifier](https://cleanweb.tools/tools/css-minifier): Minify your CSS code to reduce file size and improve load times.
- [UUID Generator](https://cleanweb.tools/tools/uuid-generator): Generate unique UUIDs (v4) for your applications.
  - [UUID v4](https://cleanweb.tools/tools/uuid-generator/v4): Generate RFC 4122 compliant UUID v4 identifiers in your browser. 122 bits of cryptographic entropy — safe for database keys, idempotency tokens, and public URLs.
  - [UUID v7](https://cleanweb.tools/tools/uuid-generator/v7): Generate RFC 9562 UUID v7 identifiers. Time-ordered UUIDs that keep database b-tree indexes tight and make bulk inserts much faster than v4.
  - [UUID v1](https://cleanweb.tools/tools/uuid-generator/v1): Generate RFC 4122 version 1 UUIDs: Gregorian 100-ns timestamp plus random node ID. For legacy systems, Cassandra TIMEUUIDs, and older Windows COM code.
  - [Nil UUID](https://cleanweb.tools/tools/uuid-generator/nil): The nil UUID, all zeros. A spec-defined sentinel for UUID-shaped placeholder values — never confused with a real generated UUID.
  - [GUID (Microsoft)](https://cleanweb.tools/tools/uuid-generator/guid): Generate GUIDs in Microsoft format — uppercase UUID v4 wrapped in braces. For .NET Guid parsers, SQL Server, registry entries, and Windows tooling.
- [Regex Tester](https://cleanweb.tools/tools/regex-tester): Test and debug regular expressions with real-time matching.
- [Password Generator](https://cleanweb.tools/tools/password-generator): Generate secure, random passwords with customizable options.
  - [Strong Password](https://cleanweb.tools/tools/password-generator/strong): Generate long random passwords using the browser's cryptographically secure random source. 16–64 characters with mixed case, digits, and symbols.
  - [Memorable Passphrase](https://cleanweb.tools/tools/password-generator/memorable): Generate easy-to-remember 4–8 word passphrases joined by hyphens. Diceware-inspired, crypto-random word selection, strong against brute-force.
  - [Random PIN](https://cleanweb.tools/tools/password-generator/pin): Generate random numeric PINs for phone locks, 2FA backup codes, safes, and debit cards. Crypto-random digit selection with rejection sampling.
- [HTML Entity Encoder](https://cleanweb.tools/tools/html-entity-encoder): Convert special characters to HTML entities and vice versa.
- [Hash Generator](https://cleanweb.tools/tools/hash-generator): Generate MD5, SHA-1, SHA-256 hashes from text.
  - [MD5 Hash](https://cleanweb.tools/tools/hash-generator/md5): Generate MD5 hashes from text in your browser. Fast 128-bit checksums for deduplication, ETags, and cache keys — not for security.
  - [SHA-1 Hash](https://cleanweb.tools/tools/hash-generator/sha1): Generate SHA-1 (160-bit) hashes from text in your browser. Legacy algorithm — SHAttered collision attacks proven in 2017; use SHA-256 for new work.
  - [SHA-256 Hash](https://cleanweb.tools/tools/hash-generator/sha256): Generate SHA-256 (256-bit) hashes from text in your browser. The modern default for digital signatures, TLS certificates, and Bitcoin addresses.
  - [SHA-512 Hash](https://cleanweb.tools/tools/hash-generator/sha512): Generate SHA-512 (512-bit) hashes from text in your browser. Longer digest than SHA-256, often faster on 64-bit CPUs.

## Designer

- [Color Picker & Converter](https://cleanweb.tools/tools/color-picker): Pick colors and convert between HEX, RGB, HSL formats.
- [Box Shadow Generator](https://cleanweb.tools/tools/box-shadow-generator): Create custom CSS box shadows with a visual editor.
- [CSS Gradient Generator](https://cleanweb.tools/tools/gradient-generator): Create beautiful linear and radial CSS gradients.
- [Aspect Ratio Calculator](https://cleanweb.tools/tools/aspect-ratio-calculator): Calculate and convert aspect ratios for images and videos.
- [Favicon Generator](https://cleanweb.tools/tools/favicon-generator): Create favicons from images for your website.

## Marketing

- [Word & Character Counter](https://cleanweb.tools/tools/word-counter): Count words, characters, sentences, and paragraphs.
- [Meta Tag Generator](https://cleanweb.tools/tools/meta-tag-generator): Generate SEO-friendly meta tags for your web pages.
- [UTM Link Builder](https://cleanweb.tools/tools/utm-builder): Create UTM-tagged URLs for campaign tracking.
- [QR Code Generator](https://cleanweb.tools/tools/qr-code-generator): Generate QR codes from text, URLs, or any data.
  - [URL QR Code](https://cleanweb.tools/tools/qr-code-generator/url): Generate a QR code that opens a URL when scanned. Instantly scannable on every phone camera without a separate app — ideal for posters, business cards, and packaging.
  - [WiFi QR Code](https://cleanweb.tools/tools/qr-code-generator/wifi): Generate a QR code that auto-connects phones to your WiFi network when scanned. SSID, password, and security type encoded in the standard WIFI: format.
  - [vCard QR Code](https://cleanweb.tools/tools/qr-code-generator/vcard): Generate a QR code that adds a contact card to a phone's address book when scanned. Standard vCard 3.0 format with name, phone, email, org, URL.
  - [Text QR Code](https://cleanweb.tools/tools/qr-code-generator/text): Encode any plain text — a message, a note, a secret, a snippet of code — into a scannable QR code. Up to a few hundred characters recommended.
- [URL Slug Generator](https://cleanweb.tools/tools/slug-generator): Convert titles and text into SEO-friendly URL slugs.
- [Social Preview Generator](https://cleanweb.tools/tools/social-previews): Create beautiful social media preview images with laptop mockups.

## Text & Content

- [Lorem Ipsum Generator](https://cleanweb.tools/tools/lorem-ipsum-generator): Generate placeholder text for your designs and mockups.
  - [Lorem Ipsum Paragraphs](https://cleanweb.tools/tools/lorem-ipsum-generator/paragraphs): Generate 1–20 paragraphs of Lorem Ipsum placeholder text. Perfect for blog-post mockups, article drafts, and long-form layout testing.
  - [Lorem Ipsum Sentences](https://cleanweb.tools/tools/lorem-ipsum-generator/sentences): Generate 1–100 Lorem Ipsum sentences for short-copy mockups: product descriptions, form field hints, tooltips, and headline alternates.
  - [Lorem Ipsum Words](https://cleanweb.tools/tools/lorem-ipsum-generator/words): Generate 1–500 Lorem Ipsum words for headlines, button labels, tags, and short copy slots where a full sentence is too long.
- [Markdown Preview](https://cleanweb.tools/tools/markdown-preview): Write and preview Markdown with live rendering.
- [Text Case Converter](https://cleanweb.tools/tools/case-converter): Convert text between different cases instantly.
  - [camelCase](https://cleanweb.tools/tools/case-converter/camel-case): Convert any text to camelCase. Remove spaces and punctuation, lowercase the first word, capitalise the rest. Standard JavaScript variable-naming convention.
  - [snake_case](https://cleanweb.tools/tools/case-converter/snake-case): Convert any text to snake_case. Lowercase words joined by underscores — the Python, Ruby, and SQL column convention.
  - [kebab-case](https://cleanweb.tools/tools/case-converter/kebab-case): Convert any text to kebab-case. Lowercase words joined by hyphens — the standard for CSS class names, URL slugs, and npm package names.
  - [PascalCase](https://cleanweb.tools/tools/case-converter/pascal-case): Convert text to PascalCase. Capitalise every word, remove spaces and punctuation — the convention for class names, React components, and .NET types.
  - [Title Case](https://cleanweb.tools/tools/case-converter/title-case): Convert any text to Title Case. Capitalise the first letter of each word, keep whitespace — for book titles, chapter headings, and AP-Style headlines.
- [Text Diff Checker](https://cleanweb.tools/tools/diff-checker): Compare two texts and highlight the differences.

## Converters

- [Base64 Encoder & Decoder](https://cleanweb.tools/tools/base64-encoder-decoder): Encode and decode Base64 strings quickly and easily.
  - [Base64 Encode](https://cleanweb.tools/tools/base64-encoder-decoder/encode): Encode text to Base64 in your browser. For inlining SVGs in CSS, building Basic-Auth headers, or packing binary data into URL-safe ASCII.
  - [Base64 Decode](https://cleanweb.tools/tools/base64-encoder-decoder/decode): Decode Base64 back to plain text in your browser. Peek at JWT payloads, unpack email MIME parts, or read Basic-Auth strings without a server round-trip.
- [URL Encoder & Decoder](https://cleanweb.tools/tools/url-encoder-decoder): Encode and decode URLs for safe transmission.
  - [URL Encode](https://cleanweb.tools/tools/url-encoder-decoder/encode): Percent-encode text for safe use in URLs. For query parameters, path segments, form submissions, and anywhere reserved characters need escaping.
  - [URL Decode](https://cleanweb.tools/tools/url-encoder-decoder/decode): Decode percent-encoded URLs back to readable text in your browser. For inspecting OAuth callbacks, deep links, or debug-parsing query strings.
- [Timestamp Converter](https://cleanweb.tools/tools/timestamp-converter): Convert between Unix timestamps and human-readable dates.
  - [Unix to Date](https://cleanweb.tools/tools/timestamp-converter/unix-to-date): Convert a Unix timestamp to a human-readable date. Auto-detects seconds vs milliseconds, shows local, UTC, and ISO 8601 formats.
  - [Date to Unix](https://cleanweb.tools/tools/timestamp-converter/date-to-unix): Convert a date/time into a Unix timestamp. Supports ISO 8601, RFC 2822, and browser datetime-local input. Returns seconds and milliseconds.
  - [Millisecond Timestamp](https://cleanweb.tools/tools/timestamp-converter/milliseconds): Convert between Unix millisecond timestamps (13 digits) and human-readable dates. The default format for JavaScript Date.now() and modern JSON APIs.
- [Image to Base64](https://cleanweb.tools/tools/image-to-base64): Convert images to Base64 data URLs for embedding.
- [JSON to CSV Converter](https://cleanweb.tools/tools/json-to-csv): Convert JSON data to CSV format and vice versa.
  - [JSON → CSV](https://cleanweb.tools/tools/json-to-csv/json-to-csv): Convert a JSON array of objects into CSV spreadsheet format. Auto-detected column headers, nested objects flattened, RFC 4180 quoting.
  - [CSV → JSON](https://cleanweb.tools/tools/json-to-csv/csv-to-json): Convert CSV spreadsheet data to a JSON array of objects. Header-row column names, RFC 4180 quote handling, type-safe by default (all strings).