JSON Validator
Regex Tester
Password Generator
JWT Debugger
Base64 Tool
Color Palette
Text Diff
CRON Builder
UUID Generator
SQL Formatter
Mermaid Editor
Markdown Exporter
HTTP Composer
Browser Inspector
14 browser-based utilities that go from idea to result in seconds — no installs, no logins, no friction.
Test, validate, format, and debug the code and protocols you work with every day.
Live regex testing with match highlighting, capture group breakdown, named groups, and full flag controls. Test against multiple strings simultaneously.
Open toolValidate, format, minify, and transform JSON. Syntax highlighting with exact line-and-column error location. Copy formatted or minified output instantly.
Open toolDecode and inspect JSON Web Tokens entirely client-side. See header, payload, expiry status, and algorithm. Verify signatures without sending your secret anywhere.
Open toolPrettify raw SQL queries with keyword casing, indentation, and clause alignment. Supports MySQL, PostgreSQL, SQLite, and MSSQL dialects.
Open toolCompose and fire HTTP requests with custom method, headers, query params, and body. See response status, headers, body, and precise timing — like a lightweight Postman.
Open toolSide-by-side diff of two text blocks with line-level change highlighting. Useful for comparing config files, API responses, or any two versions of text.
Open toolBuild CRON expressions visually or type them manually. Real-time human-readable description and a preview of the next 10 scheduled run times.
Open toolGenerate, encode, convert, and inspect — the small tools that save outsized time.
Generate v4 UUIDs instantly. Bulk-generate up to 1,000 at once. Validate existing UUIDs. Copy as plain text, JSON array, or SQL VALUES clause.
Open toolGenerate cryptographically secure passwords using the Web Crypto API. Configure length, character sets, and quantity. Live strength meter based on entropy bits.
Open toolEncode and decode Base64 for strings and files. Supports URL-safe variant. Handles binary files — drag and drop an image to get its Base64 data URI instantly.
Open toolPick colors and convert instantly between HEX, RGB, HSL, and HSV. Generate complementary, triadic, and analogous palettes. Export as CSS variables or Tailwind config.
Open toolWrite Mermaid syntax and see diagrams render live. Supports flowcharts, sequence diagrams, Gantt charts, class diagrams, ER diagrams. Export as SVG or PNG.
Open toolWrite Markdown with a live split-pane preview. Export to clean HTML, download as .md file, or copy the rendered HTML. GFM tables and fenced code blocks supported.
Open toolDiagnose browser, OS, screen, hardware, and supported Web APIs in one report. Useful for debugging cross-browser issues and checking feature support without MDN.
Open tool