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Inspect a JSON Web Token's header and payload, view exp/iat/iss claims, and check the signature algorithm. Decoding is local - your tokens never leave your browser.
This jwt decoder runs 100% in your browser. Nothing you paste, drop, or generate ever leaves your device - no analytics on your input, no uploads, no logs.
No. Decoding is local; verification needs the secret/public key.
Same browser-only philosophy. Free, no signup, no upload.
Encode and decode Base64 with full Unicode and URL-safe support.
Percent-encode and decode URLs and query parameters.
Generate v1, v4, and v7 UUIDs in bulk - copy or download as JSON.
Check password strength against length, classes, and common-password lists.
Beautify, validate, and minify JSON with sortable keys, exact error positions, and a one-click copy.
Validate JSON syntax with exact line and column for every error.
We design and ship internal tooling, dashboards, and customer-facing utilities. Tell us what you need and we'll scope it.