Code & Developer Tools

Test JavaScript-style regular expressions in your browser: enter a pattern, toggle global (g), case-insensitive (i), and multiline (m), paste sample text, and see highlighted matches with start indexes. Invalid patterns show a clear error. No signup; your strings stay on your device.

Encode plain UTF-8 text to Base64 or decode Base64 back to text in your browser (whitespace ignored when decoding). Swap encode/decode, copy the result, or upload a file in encode mode to extract the raw Base64 payload from a data URL. Convert runs client-side only.

Pretty-print, minify, and validate JSON payloads.

Compare two JSON documents semantically — skip keys, optional array sorting, JSON paths, and side-by-side mismatch diffs. Runs entirely in your browser.

Paste an original and a modified version, then Compare to see a unified diff: line-by-line with +/- prefixes and optional line counts, or word-by-word with highlights. Copy the plain-text diff, switch views anytime, or Clear. Uses the diff library in your browser — nothing is uploaded.

Beautify SQL in your browser with the sql-formatter library: choose a dialect (PostgreSQL, MySQL, SQLite, BigQuery, and more), keyword case (upper, lower, preserve), and indentation (2 spaces, 4 spaces, or tab). Format, copy, or download query.sql. Identifiers and function names stay as typed unless you change keyword casing.

Beautify CSS, SCSS, or Less with Prettier (PostCSS plugin, tab width 2 or 4, print width 100). Minify plain CSS with csso (restructure on). Minify requires Syntax set to CSS — compile SCSS/Less first or use Beautify only. Load sample, copy, or download styles.css / .scss / .less — all in your browser.

Prettify HTML with Prettier (HTML parser, tab width 2 or 4, print width 100) or minify with html-minifier-terser: collapse whitespace, strip comments, short doctype, tighten boolean and redundant attributes, minify inline CSS and JS. Load sample, copy, or download document.html — all client-side.

Beautify JavaScript or TypeScript with Prettier (tab width, semicolons, single vs double quotes, print width 100). Minify JavaScript with Terser (compress, mangle, strip comments; detects ES modules). Load sample, copy, or download script.js / script.ts — all in your browser.

Format PHP with Prettier and @prettier/plugin-php in your browser (tab width, print width 100). Format Python with Black inside Pyodide (line length 88, 100, or 120) — first run downloads the Pyodide runtime and Black from CDNs; PHP formatting stays local. Format, sample, copy, or download snippet.php / snippet.py.

HTTP client in the browser: collections, environments, {{variable}} interpolation, Bearer/Basic/API key/OAuth2/custom auth, JSON/form/urlencoded/multipart/GraphQL bodies, pre-request scripts, history, and code snippets (fetch, Axios, Python, PHP, Go, cURL, C#, Ruby). Sends through Dynamic Duniya’s API proxy (30s timeout). Workspace in localStorage; optional cloud sync when signed in.

Generate MD5 (via local md5), SHA-1, SHA-256, SHA-384, and SHA-512 digests from typed text or a whole file. Toggle which algorithms to run, optionally compute HMAC-SHA with a secret (MD5+HMAC not supported in-browser). Uses Web Crypto for SHA/HMAC. Copy each hex result. Nothing is uploaded — hashing runs in your browser (HTTPS recommended for crypto APIs).

Encrypt and decrypt text or any file in your browser with AES-256-GCM and PBKDF2 — nothing leaves your device.

Simulate and visualize Token Bucket, Leaky Bucket, Fixed Window, Sliding Log, and Sliding Counter — interactive traffic patterns, compare mode, and code examples.