Developer Tools
Format, validate, encode, test and generate — the everyday dev belt.
9 tools
Every tool in this category is free, needs no sign-up and runs entirely in your browser. Pick one below to get started.
JSON Formatter & Validator
Pretty-print, minify, validate and inspect JSON with a tree view.
Base64 Encoder / Decoder
Encode or decode text and files to and from Base64.
URL Encoder / Decoder
Percent-encode or decode URLs and query components.
HTML Entity Encoder / Decoder
Escape and unescape HTML entities safely.
HTML / CSS / JS Minifier
Strip whitespace and comments to shrink front-end assets.
Code Beautifier
Reformat messy HTML, CSS, JS and JSON with configurable style.
Regex Tester
Test patterns with live match highlighting and group inspection.
UUID Generator
Bulk-generate v4 and v7 UUIDs, ULIDs and nano IDs.
Cron Expression Builder
Build and explain cron schedules with the next run times.