Tools
Small, free developer utilities. Everything runs client-side in your browser, nothing you type is ever sent anywhere.
All tools
JSON Formatter
Format, validate, and minify JSON, runs entirely in your browser, nothing is sent anywhere.
Runs in your browserBase64 Encoder
Encode or decode Base64 text with correct UTF-8 handling; runs entirely in your browser.
Runs in your browserUUID Generator
Generate cryptographically random v4 UUIDs; runs entirely in your browser.
Runs in your browserHash Generator
Generate SHA-1, SHA-256, SHA-384, or SHA-512 digests of text, runs entirely in your browser.
Runs in your browserRegex Tester
Test a regular expression against sample text with live match highlighting and capture groups; runs entirely in your browser.
Runs in your browserJWT Decoder
Decode a JWT header and payload; runs entirely in your browser, the signature is not verified since no secret is available client-side.
Runs in your browserSubnet Calculator
Calculate network address, broadcast address, usable host range, and subnet mask from an IPv4 CIDR, runs entirely in your browser.
Runs in your browserCron Generator
Build a 5-field cron expression from structured minute, hour, day, month, and weekday inputs with a human-readable description; runs entirely in your browser.
Runs in your browser