Developer tools

JSON formatters, hash generators, regex testers, JWT decoders, cron helpers and more.

13 tools

JSON Formatter & Validator

Format, validate and prettify JSON instantly

Decode and inspect JSON Web Tokens instantly

Generate UUIDs v1, v4, v5 instantly

Generate SHA-1, SHA-256, and SHA-512 hashes instantly

Convert any title to a clean SEO-friendly URL slug

Generate placeholder text for mockups and designs

Generate strong, random passwords instantly

Compare two texts and highlight the differences

Find the ISO week number for any date

Convert times between 18 world time zones

Test and debug regular expressions with real-time highlighting

Build cron expressions visually with presets

Preview how your page looks in Google search results