What's the difference between Personal and Studio?

Personal ($39) is for one person — unlimited use on one active device at a time. Activate on a new device and the old one signs out. Studio ($199) is for teams and commercial client work — unlimited team members, early access to new tools, and a commercial license.

Do I need an account?

No. Use any tool free up to 5 times per day on compute-heavier tools, and unlimited on lightweight ones. No card, no account, no signup required.

Where are my files processed?

Right on your device. Files never upload to any server. Everything runs in your browser — you can verify in DevTools → Network.

What happens if I use my Personal license on a second device?

The new device activates and the old device signs out. Your license key stays the same — you just move it between devices as needed. No limit on how often you switch.

Does this work on my phone?

Yes. Every tool works on iPhone, Android, tablet, and desktop.

What if I want a refund?

30-day money-back guarantee on both tiers. No questions asked. Email sales@cipherforces.com.

Will you add more tools?

Yes. New tools ship regularly. Your license includes every tool we ever release — Studio members get early access.

SecurityFree

JWT Decoder

Decode a JSON Web Token to inspect its header, payload, and expiry.

By Daniel BeglaryanUpdated August 2026

PrivateWorks OfflineNo Account

Paste your JWT

Deep dive

About JWT Decoder.

Decode and Inspect Any JWT — Locally

CipherForces JWT Decoder splits a JSON Web Token into its three parts (header, payload, signature), base64url-decodes each, and pretty-prints the JSON with syntax highlighting. Expiration and issued-at timestamps are shown as human-readable UTC alongside a relative time ("expires in 14 minutes" / "issued 3 hours ago").

Unlike jwt.io — which is excellent but requires a network round trip to their servers — this tool runs 100% in your browser. You can paste production tokens without worrying that they'll leak into anyone's logs.

What It Shows

Header: The algorithm (alg) and token type (typ), plus any custom header claims.
Payload: Every claim in the token body with the standard ones (iss, sub, aud, exp, iat, nbf, jti) highlighted.
Expiry status: Clear green/yellow/red indicator — active, expiring soon, or expired.
Signature warning: If alg is "none", we flag it loudly. Unsigned JWTs should almost never be trusted in production.

Key Limitation

This tool does not verify the signature — that requires the issuer's public key or HMAC secret, which we don't ask for. Pasting a token into a decoder on any site is safe; pasting it into a verifier means handing over your secret. For debugging, decoding is usually all you need.

Privacy: All decoding happens in your browser. The token string is never sent to any server.

FAQ

Frequently asked questions.

How do I decode a JWT to see its payload?

Paste your JSON Web Token into the JWT Decoder and it instantly splits the token into its three parts, then Base64URL-decodes the header and payload into readable JSON. You can inspect claims like issuer, subject, and roles right away. No signup is needed and the tool is free.

Is it safe to paste a JWT into this decoder?

Yes. The JWT Decoder runs entirely in your browser using JavaScript, so your token is never uploaded to any server. All decoding happens locally on your device, and nothing is stored or transmitted. This keeps sensitive tokens private, which matters because a JWT can grant access to your account.

Can this tool show when my JWT expires?

Yes. The decoder reads the standard exp claim from the payload and converts that Unix timestamp into a human-readable date and time. It also shows iat and nbf claims when present, so you can quickly check whether a token has expired or is still valid for use.

Does decoding a JWT verify its signature?

No. Decoding only reads the header and payload, which are Base64URL-encoded, not encrypted, so anyone can view their contents. Verifying the signature requires the secret or public key and confirms the token was not tampered with. Treat decoded payload data as readable but unverified.

Three steps