4 tools · 100% client-side · open source

Every tool a backend dev Googles daily

JSON, JWT, Base64, UUID and more, all in one place.
No server. No tracking. Your data never leaves the browser.

Format, minify & validate JSON payloads

Decode tokens, inspect claims & check expiry

Encode & decode Base64 strings and files

Generate UUID v4, v7 and ULID identifiers

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