# JWT Tool – Token Decoder > Decode, build & verify JWTs. Learn security best practices. 100% offline. Canonical page: [https://chrome-stats.com/d/com.fishnetwork.jwttool](https://chrome-stats.com/d/com.fishnetwork.jwttool) ## Overview - **ID:** `com.fishnetwork.jwttool` - **Platform:** Android - **Type:** Android app - **Status:** Available - **Publisher:** Fish Network - **Category:** TOOLS - **Downloads:** 73 - **Version:** 1.0 - **Last updated:** 2026-02-08 - **First published:** 2026-02-08 - **Publisher country:** CN - **Size:** 33 MB - **Data as of:** 2026-09-13 - **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=com.fishnetwork.jwttool) - **Website:** [https://srmapp.com](https://srmapp.com/) - **Privacy policy:** [https://srmapp.com/docs/privacy-policy.html](https://srmapp.com/docs/privacy-policy.html) ## Description JWT Tool — The Complete JWT Toolkit

A fast, privacy-first JWT toolkit for developers, security professionals, and learners.
Decode, build, and verify JSON Web Tokens — completely offline.

JWT Decoder
• Paste JWT or extract from clipboard instantly
• View decoded header, payload, and signature
• Real-time expiration countdown timer
• Verify signatures (HS256, RS256, ES256 and more)
• Automatic security vulnerability scanning
• Load example tokens to learn JWT structure

JWT Builder
• Create tokens with customizable claims
• Quick templates: Auth, ID, Refresh tokens
• Support for multiple algorithms (HMAC, RSA, ECDSA)
• Set expiration with quick buttons (+1h, +1d, +7d)
• Random secret key generator with strength indicator
• Real-time token preview with color-coded sections

JWT Learning Guide
• Structured tutorials from beginner to advanced
• Learn JWT basics, structure, and algorithms
• Interactive practice exercises
• Track your learning progress

Developer Tools
• Base64 Encoder/Decoder
• Unix Timestamp Converter
• Cryptographic Key Generator

Security Features
• Detect alg=none vulnerability
• Identify weak secrets and key confusion attacks
• Check missing expiration and required claims

Token History
• Save decoded and generated tokens
• Mark favorites for quick access
• Organize by date

Privacy First
• No account required
• No tracking or analytics
• Works fully offline
• All data stays on your device

Whether you're debugging authentication flows, building secure APIs, or learning JWT concepts, JWT Tool is your essential mobile companion. ## Rankings - #2,102,097 — Overall ## Permissions and access ### Permissions - `android.permission.INTERNET` - `android.permission.READ_EXTERNAL_STORAGE` - `android.permission.READ_PHONE_STATE` - `android.permission.WRITE_EXTERNAL_STORAGE` - `com.android.vending.CHECK_LICENSE` - `com.fishnetwork.jwttool.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION` - `com.google.android.finsky.permission.BIND_GET_INSTALL_REFERRER_SERVICE` ## Similar extensions and apps - [JWT Decoder](https://chrome-stats.com/d/com.yasien.jwtdecoder) — 2 users - [JWT Decoder](https://chrome-stats.com/d/info.camposha.jwt_decoder) — 229 users - [JWT Decoder / Token Viewer](https://chrome-stats.com/d/com.kns.jwtdecoder) — 210 users - [JWT & Base64 Decoder/Verifier](https://chrome-stats.com/d/app.ainfo.jwt.decoder) — 11 users - [JWT Generator - Token Tool](https://chrome-stats.com/d/com.devtools.jwtgenerator) — 76 users - [Dev Tools: JWT, JSON, Regex](https://chrome-stats.com/d/com.devtools.app) — 19 users - [Base64 Toolkit: Encode & JWT](https://chrome-stats.com/d/com.mobileappzgroup.base64toolkit) — 32 users - [JWT Checker](https://chrome-stats.com/d/com.yauheni.jwt) — 8,064 users, 3.47 / 5 - [DevToolbox](https://chrome-stats.com/d/com.mrwhitedeveloper.devtoolbox) — 3 users - [Azodik Utils - Developer Tools](https://chrome-stats.com/d/com.azodik.utils) — 21 users - [Dev Tools: JSON, JWT, Regex](https://chrome-stats.com/d/com.mm.toolbox.dev.tools) — 21 users - [JWT Codec - Encoder Decoder](https://chrome-stats.com/d/com.iorgana.jwt_enc) — 282 users --- Source: [Chrome-Stats](https://chrome-stats.com/d/com.fishnetwork.jwttool)