Free Developer Tools
Fast. Private. No frameworks. No tracking. Everything runs in your browser.
JSON Formatter & Validator
Format, validate, minify, and sort JSON keys. Instant, client-side.
Base64 Encode / Decode
Encode text to Base64 or decode Base64 back. URL-safe variant included.
Regex Tester
Test regular expressions with real-time matching and capture group highlighting.
JWT Decoder
Decode JSON Web Tokens — view header, payload, claims, and expiration status.
URL Encoder / Decoder
Encode/decode URLs and parse URL components. encodeURIComponent & encodeURI.
Color Converter
Convert between HEX, RGB, and HSL with live preview and color picker.
Cron Expression Builder
Build cron expressions visually with human-readable descriptions and next run times.
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-512 hashes. Supports file hashing.
Markdown Previewer
Write Markdown, see live preview. Supports GFM, tables, and code blocks.
Lorem Ipsum Generator
Generate placeholder text — paragraphs, sentences, or words. Instant.
Zero frameworks. Zero tracking. Zero server calls. Every tool runs 100% client-side in your browser.
Built by Rio Gesulgon — Senior Fullstack Engineer, framework-free enthusiast.