Developer tools
Everyday developer utilities that never send your data to someone else’s server.
- Runs in your browser
- No upload
- No sign-up
Ready to use
JSON Formatter
Format, validate and query JSON, check a schema, make TypeScript or Zod types.
Open toolBase64 Encode / Decode
Text or files to Base64 and back, with type detection.
Open toolPassword Generator
Strong random passwords and passphrases, made on your device.
Open toolHash Generator
MD5, SHA and HMAC hashes, plus webhook signature checks.
Open toolURL Encoder / Decoder
Encode, decode and take apart web addresses and query strings.
Open toolJWT Decoder
Decode, verify and sign JSON Web Tokens.
Open toolUnix Timestamp Converter
Epoch time to a readable date and back, in any time zone.
Open toolUUID Generator
Random UUID v4, time-ordered v7 and ULID, one or thousands.
Open toolRegex Tester
Test regular expressions live, with matches, groups and plain-English help.
Open toolCSV, JSON, Excel, YAML & XML Converter
Convert CSV, JSON, Excel, YAML, TOML, XML and SQL.
Open toolCode Beautifier & Minifier
Tidy or minify HTML, CSS, JavaScript, TypeScript and more.
Open toolSQL Formatter
Make SQL queries readable.
Open toolCron Expression Builder
Build and explain cron schedules.
Open toolMeta Tag Generator
Meta and social tags with a live share preview.
Open toolRobots.txt Generator
Build robots.txt and sitemap.xml files.
Open toolPassword Strength Checker
See how long a password would take to crack.
Open tool2FA Code Generator (TOTP)
Test authenticator codes from a secret.
Open toolFake Data Generator
Realistic test names, emails and addresses.
Open toolHTTP Status Codes
Every status code explained in plain English.
Open tool