JWT & Base64 Decoder/Verifier
Sviluppatori
Gratis · Progettata per iPad. Non verificata per macOS.
JWT Decoder, Encoder & Verifier is the JSON Web Token companion your phone has been missing. Paste a token and instantly see its header, payload, and claims decoded - then verify its signature, sign your own, or convert Base64 back and forth. Everything runs on the device. No accounts, no network calls, nothing stored.
100% OFFLINE, NOTHING LEAVES YOUR DEVICE
Tokens often carry sensitive data, so this app never uploads them. All parsing, verification, signing, and Base64 work happens locally. There is no server, no logging, and no analytics on the content you paste. It is the safe way to inspect a production token on your phone.
DECODE
- Live decoding as you type or paste - no "decode" button needed
- Pretty-printed JSON for both the header and the payload
- Time claims (iat, nbf, exp) shown as readable UTC, with EXPIRED and "not yet valid" badges
- Raw Base64URL signature segment displayed separately
- Clear, specific errors for malformed tokens
VERIFY SIGNATURES
- HMAC: HS256, HS384, HS512 with a shared secret (raw or Base64 key)
- RSA: RS256, RS384, RS512 (RSASSA-PKCS1-v1.5) with a PEM public key
- RSA-PSS: PS256, PS384, PS512 with a PEM public key
- ECDSA: ES256, ES384, ES512 with a PEM public key
- The input automatically switches between secret and PEM based on the token's algorithm, and the result clearly states valid, invalid, or why it could not be checked
SIGN AND GENERATE
- Build and HMAC-sign a JWT from any JSON payload (HS256/384/512)
- One-tap "Generate key pair" creates a throwaway RSA or EC key for testing, fills the private key, and shows the public key to copy straight into the Verify tab - a complete sign-then-verify loop, entirely on device
BASE64 TOOLBOX
- Encode and decode standard Base64 and URL-safe Base64URL
- Optional padding control
- Falls back to a hex view when decoded bytes are not valid UTF-8 text
BUILT FOR ENGINEERS
- Paste straight from the system clipboard with one tap
- Load a built-in example to see how each tool works
- Copy any result to the clipboard
- Monospace, selectable output throughout
POLISHED TO MATCH YOUR PHONE
- Native Material Design 3 interface
- Light and dark themes that follow the system setting
- Localized in English, Traditional Chinese, Simplified Chinese, and Japanese
WHO IT IS FOR
- Backend and mobile developers debugging auth tokens
- Security engineers inspecting and verifying JWTs
- QA and support teams checking expiry and claims
- Anyone who needs to decode a token without pasting it into a website
A note on standards: this tool reads and verifies tokens; it is an inspection and testing utility, not a secrets manager. Keys you paste or
generate stay on the device and are never transmitted.
JWT Decoder, Encoder & Verifier is fast, private, and made for real debugging. Install it once and stop pasting tokens into random web decoders.
Valutazioni e recensioni
- L’app non ha ricevuto un numero sufficiente di valutazioni o recensioni per poter mostrare una panoramica.
- Smoother, more reliable experience with under-the-hood improvements.
Lo sviluppatore, Yuan-Yi Chang, ha indicato che le procedure per la tutela della privacy dell’app potrebbero includere il trattamento dei dati descritto di seguito. Per scoprire di più, consulta l’informativa sulla privacy dello sviluppatore .
Dati utilizzati per monitorarti
I seguenti dati possono essere utilizzati per monitorarti nelle app e nei siti web di proprietà di altre aziende:
- Dati sull’utilizzo
Dati non collegati a te
I seguenti dati possono essere raccolti ma non vengono collegati alla tua identità:
- Dati sull’utilizzo
Accessibilità
Lo sviluppatore non ha ancora indicato le funzioni di accessibilità supportate dall’app. Scopri di più
Informazioni
- Dimensioni
- 39,6 MB
- Categoria
- Sviluppatori
- Compatibilità
Richiede iOS 15.0 o versioni successive.
- iPhone
Richiede iOS 15.0 o versioni successive. - iPad
Richiede iPadOS 15.0 o versioni successive. - iPod touch
Richiede iOS 15.0 o versioni successive. - Mac
Richiede macOS 12.0 o versioni successive e un Mac con chip Apple M1 o versioni successive. - Apple Vision
Richiede visionOS 1.0 o versioni successive.
- iPhone
- Lingue
- Inglese
- Età
4+
- 4+
- Contiene
Pubblicità
- Fornitore
Yuan-Yi Chang
- Yuan-Yi Chang non si identifica come operatore commerciale per questa app. Se ti trovi all’interno dello Spazio economico europeo, i diritti dei consumatori non si applicano agli accordi tra te e il fornitore.
- Copyright
- © 2026 AINFO.APP