Developer tools that run in your browser, with no tracking
Most Toolab tools are 100% client-side: your data — including tokens, credentials and sensitive payloads — never leaves your machine.
Why client-side changes everything
When a JSON formatter or a JWT decoder runs in your browser, pasted content is never transmitted. You can debug an API response holding an auth token or personal data with no risk of leaking it, and it's instant — often even offline.
It's also about compliance: no data transfer, no third-party tracking cookie, hosting in France for the rare tools that store anything.
Where to start
For data: format and validate JSON, convert between JSON, CSV, YAML, TOML and XML. For security: generate hashes, decode a JWT, create strong passwords. For reverse engineering: convert between hex, binary, int64 and floats with endianness.
Browse the categories to find the right tool, or use search: everything is free, no sign-up.
Format and indent your JSON instantly.
Compute MD5, SHA-1, SHA-256 and SHA-512 hashes of text.
Decode and verify JWT signatures directly in your browser.
Test regular expressions with highlighted match visualization.
Encode or decode text to/from Base64.
Hex, binary, int64, float and ASCII with endianness.
Generate random UUID v4 identifiers.
Share an encrypted message: expiry, self-destruct and optional password.