JWT Exp Decoder

Overview

Paste a JWT to decode header and payload locally. Exp countdown and copy — nothing leaves your browser.

JWT Exp Decoder is a minimal, privacy-first JWT inspector for developers who copy tokens from logs, API clients, or DevTools — and want to decode them without pasting into a third-party website. Features: • Paste any JWT — header and payload decoded instantly as formatted JSON • Exp countdown — see time until expiry (or how long ago it expired) with live updates • Copy header, payload, or the full token with one click • 100% local — no network requests, no storage, no telemetry • Zero host permissions — paste-only workflow • English and Chinese UI (follows Chrome language) • Light and dark mode Use cases: debugging OAuth/OIDC flows, checking exp/iat claims, inspecting API tokens, and verifying JWT structure during development. Privacy: No data is collected, stored, or transmitted. Your tokens never leave this browser.

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Details

Version
1.0.0
Updated
July 3, 2026
Flag concern
Offered by
ExtMate
Size
12.46KiB
Languages
2 languages
Developer
Email
dufubing218@gmail.com
Non-trader
This developer has not identified itself as a trader. For consumers in the European Union, please note that consumer rights do not apply to contracts between you and this developer.

Privacy

Manage extensions and learn how they're being used in your organization

The developer has disclosed that it will not collect or use your data.

This developer declares that your data is

Not being sold to third parties, outside of the approved use cases
Not being used or transferred for purposes that are unrelated to the item's core functionality
Not being used or transferred to determine creditworthiness or for lending purposes

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