JWT decoder online
Decode a JSON Web Token and read its header, payload, and issued-at and expiry dates in a readable format. The token never leaves your browser.
Header
Payload
Dates and claims
Signature
How it works
Paste a JWT and the tool splits its three parts: the header (algorithm and type), the payload with its claims, and the signature. The iat, nbf and exp dates are shown as local date and time, and you get a warning if the token has expired.
Because the token is decoded in your browser, you can use it with tokens from real environments without exposing them to a third-party service.
Frequently asked questions
Does this tool verify the JWT signature?
No. Verifying the signature requires the issuer secret or public key. The tool only decodes the content, which in a JWT is not encrypted.
Is it safe to store sensitive data in a JWT?
No. The payload is Base64URL and anyone can read it. Do not put passwords or sensitive personal data in a JWT.
Related tools
JSON validator and formatter online
Validate, beautify, minify and sort JSON online. Shows the exact error line and column. Free, and your data never leaves your browser.
Open toolBase64 encode and decode online
Encode and decode Base64 text with full UTF-8 support (accents, emojis), URL-safe variant, and file or image to Base64 conversion.
Open toolURL encode and decode online
Encode and decode URLs and query parameters (percent-encoding), and break a URL down into protocol, host, path and parameters.
Open toolUUID generator online (v4, v7 and ULID)
Generate UUID v4, time-ordered UUID v7 and ULID, one or thousands at a time. Uppercase, no hyphens and a UUID validator.
Open toolMD5, SHA-1, SHA-256 and SHA-512 hash generator
Compute the MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hash of text or a file, in hex or Base64. Ideal for verifying downloads.
Open toolHTML entities encoder and decoder
Escape special characters to HTML entities (< > & ") or turn entities back into text. Optional encoding of non-ASCII characters.
Open toolNeed a custom tool for your business?
Tell us about your case and in 30 minutes we'll give you a clear diagnosis: what's going on, what to do first and what it might cost. No strings attached.