Developer tools
Format JSON and SQL, test regex, diff code, check HTTP statuses and calculate checksums.
Every tool runs in your browser. No account or uploads; limits vary by tool.
JSON Formatter
Format, validate & minify JSON
Regex Tester
Test regular expressions live
Markdown Preview
Live Markdown editing & preview
HTML Minifier
Minify and pretty-print HTML
CSS Cursor Generator
Preview the cursor property
JWT Decoder & Verifier
Decode and verify JWT tokens
JSON to TypeScript
Generate TypeScript types from JSON
SQL Formatter
Format & beautify SQL queries
XML Formatter & Validator
Format, minify & validate XML
Cron Expression Parser
Explain & preview cron schedules
chmod Calculator
Octal ↔ symbolic permissions
PX ↔ REM Converter
Convert pixels to rem and back
HTTP Status Codes
Every HTTP status, explained
URL Parser
Break any URL into its parts
Checksum & HMAC Calculator
MD5, CRC-16, CRC-32, SHA & HMAC
JSON Tree Viewer
Collapsible JSON explorer
Bitwise Calculator
Bitwise AND, OR, XOR & more
IPv4 Converter
IP ↔ binary, hex, octal, integer
CIDR Calculator
Network, hosts & subnet masks
HTML Formatter
Beautifully indent HTML markup
CSS Beautifier
Readable, consistent CSS
JavaScript Beautifier
Format & validate JS instantly
CSV Formatter
Table view & normalized CSV
CSV ⇄ SQL Converter
CSV ↔ INSERT statements
SQLite Viewer
Open .db files & run queries
SVG Formatter
Beautify or minify SVG markup