Developer & Web Tools
Small, fast utilities for everyday web work: format JSON, test a regex, generate meta tags and structured data, and hash or encode strings locally.
11 free tools · no signup · runs in your browser
JSON Formatter & Validator
Pretty-print, minify and validate JSON with error locations.Base64 Encode / Decode
Encode text to Base64 or decode it back, UTF-8 safe.URL Encode / Decode
Percent-encode or decode URLs and inspect query parameters.Regex Tester
Test JavaScript regular expressions with highlighted matches.Meta Tag Generator
SEO, Open Graph and Twitter card tags with a search preview.JSON-LD Schema Generator
Structured data for articles, products, FAQs, businesses and more.Color Palette Generator
Harmonious palettes, tints and shades with contrast checks.CSS Gradient Generator
Linear, radial and conic gradients with copy-ready CSS.CSS, HTML & JS Minifier
Shrink CSS, HTML and JavaScript by stripping comments and whitespace.UUID Generator
Random v4 and time-ordered v7 UUIDs, in bulk.Hash Generator (SHA-256)
SHA-1, SHA-256, SHA-384 and SHA-512 hashes of text or files.Which developer tool do you need?
Everything here runs on your machine, so API responses and tokens never leave your browser. Popular picks are the JSON formatter for debugging APIs, the regex tester with a safety timeout, and the meta tag and JSON-LD schema generators for SEO.