JWT Tool – Token Decoder

Decode, Build & Verify JWTs

Free · Designed for iPad

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.

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The developer, 志鹏 潘, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary based, for example, on the features you use or your age. Learn More

    Accessibility

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Information

    • Provider
      • 志鹏 潘
    • Size
      • 32.4 MB
    • Category
      • Developer Tools
    • Compatibility
      Requires iOS 15.1 or later.
      • iPhone
        Requires iOS 15.1 or later.
      • iPad
        Requires iPadOS 15.1 or later.
      • iPod touch
        Requires iOS 15.1 or later.
      • Mac
        Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
      • Apple Vision
        Requires visionOS 1.0 or later.
    • Languages
      • English
    • Age Rating
      4+
    • Copyright
      • © 2026 Zhipeng
  • Developer Website
  • Privacy Policy

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