Developer Tools
JSON, Base64, regex, hash. Browse 31 free developer tools below — every tool runs instantly in your browser with no signup, no install, and no watermark.
All Developer Tools
- JSON Formatter — Format and validate JSON
- Base64 Encode/Decode — Encode and decode Base64
- URL Encoder/Decoder — Encode and decode URLs
- JWT Decoder — Inspect JWT tokens
- Regex Tester — Test regular expressions
- Hash Generator — MD5, SHA-1, SHA-256, SHA-512
- UUID Generator — Generate v4 UUIDs
- QR Code Generator — Create downloadable QR codes
- CSV to JSON — Parse CSV into JSON array of objects
- JSON to CSV — Export JSON arrays to a CSV file
- YAML ↔ JSON — Convert YAML to JSON and back
- Markdown to HTML — Live MD preview + HTML export
- HTML to Markdown — Convert HTML back to clean Markdown
- Cron Parser — Explain cron + show next 5 runs
- Text Diff Checker — Side-by-side line diff of two texts
- Timezone Converter — Compare a time across world timezones
- SQL Formatter — Beautify SQL queries instantly
- HTML Entity Encoder — Encode/decode HTML entities
- Hex ↔ RGB — Quick hex/RGB color converter
- Unix Timestamp Converter — Convert between Unix time and dates
- Live HTML Preview — Edit HTML and see it render live
- CSS Minifier & Beautifier — Minify or beautify CSS
- JavaScript Minifier — Strip comments and whitespace
- Color Palette from Image — Extract dominant colors from a photo
- User Agent Parser — Detect browser, OS, and device
- My IP Info — Show your public IP and location
- YouTube Video Downloader — Download YouTube videos as MP4 or MP3
- Live Weather Lookup — Current weather for any city worldwide
- URL Parser — Break a URL into all its parts
- String Escape / Unescape — Escape JS strings, URL encode/decode
- Number Base Converter — Bin / Oct / Dec / Hex conversions