JWT & Base64 Decoder/Verifier
開發人員工具
免費 · 專為 iPad 設計。尚未針對 macOS 驗證。
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.
評分與評論
- 此App未收到足夠的評分或評論以顯示概況。
- Smoother, more reliable experience with under-the-hood improvements.
開發者Yuan-Yi Chang表明App的私隱慣例或包括下列資料的處理。詳情請參閲 開發者的私隱政策 。
用於追蹤你的資料
以下資料可能會用於追蹤你在其他公司的 App 和網站的活動：
- 使用資料
不會與你連結的資料
開發者可能會收集以下資料，但不會連結你的個人身份：
- 使用資料
輔助使用
開發者尚未表示此 App 支援哪些輔助使用功能。 進一步了解
資料
- 供應商
- Yuan-Yi Chang
- 大小
- 39.6 MB
- 類別
- 開發人員工具
- 相容性
須使用 iOS 15.0 或以上版本。
- iPhone
須使用 iOS 15.0 或以上版本。 - iPad
須使用 iPadOS 15.0 或以上版本。 - iPod touch
須使用 iOS 15.0 或以上版本。 - Mac
須使用 macOS 12.0 或以上版本及配備 Apple M1 或以上版本晶片的 Mac。 - Apple Vision
須使用 visionOS 1.0 或以上版本。
- iPhone
- 語言
- 英文
- 年齡分級
4+
- 4+
- 包含
廣告
- 版權
- © 2026 AINFO.APP