Dev Tools Tools
A toolkit built by developers for developers. Format, convert, test, and debug without spinning up a local environment — everything runs right in the browser.
22 tools available — all free, no sign-up required.
JSON Formatter
Prettify, minify, and validate JSON with syntax highlighting.
Text Case Converter
Convert text between camelCase, snake_case, Title Case, and more.
Color Converter
Convert colors between HEX, RGB, and HSL with a live preview.
Contrast Checker
Check WCAG AA/AAA color contrast compliance for any color pair.
Screen Ruler
Measure pixel distances and dimensions directly on your screen.
JWT Decoder
Decode and inspect JSON Web Tokens — view header, payload, and expiration without a server.
Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 back to text, with full Unicode support.
Number Base Converter
Convert between binary, octal, decimal, and hexadecimal instantly.
UUID Generator
Generate UUID v4 values instantly — single or bulk with copy and download.
Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from text or files instantly.
Regex Tester
Test regular expressions with live highlighting, match details, and a quick reference cheat sheet.
CSS Gradient Generator
Build beautiful CSS gradients visually with color stops, angles, and one-click copy.
Box Shadow Generator
Design CSS box shadows visually with multiple layers, presets, and live preview.
robots.txt Tester
Validate your robots.txt and test whether specific URLs are allowed or blocked.
Color Palette Generator
Generate complementary, analogous, triadic, and custom color palettes from any base color.
Cron Expression Builder
Build and decode cron expressions visually — see the next run times and a human-readable description.
PDF to Image
Convert PDF pages to PNG or JPG images — download individual pages or all at once.
PDF Merger
Combine multiple PDF files into one — drag to reorder, then download the merged result.
PDF Splitter
Split a PDF by page ranges or extract individual pages as separate files.
PDF Compressor
Re-save PDFs to remove bloat and reduce file size — results vary by document.
Image to PDF
Convert one or more images into a single PDF document with custom page sizing.
PDF Text Extractor
Extract all text content from a PDF file — copy or download as a plain text file.