# JWT Lens

> Decode & verify JWTs offline

Canonical page: [https://chrome-stats.com/d/id6774901745](https://chrome-stats.com/d/id6774901745)

## Overview

- **ID:** `id6774901745`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** Masaya Kontani
- **Category:** Developer Tools
- **Version:** 1.0
- **Last updated:** 2026-06-03
- **First published:** 2026-06-03
- **Size:** 699 KB
- **Data as of:** 2026-10-10
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/jwt-lens/id6774901745)
- **Website:** [https://mkontani.github.io/jwt-lens/](https://mkontani.github.io/jwt-lens/)
- **Privacy policy:** [https://mkontani.github.io/jwt-lens/privacy.html](https://mkontani.github.io/jwt-lens/privacy.html)

## Description

Inspect any JSON Web Token in a tap: color-coded header & payload, human-readable expiry, and local signature verification. 100% on-device — no network, no tracking.

JWT Lens is a fast, private JSON Web Token decoder and verifier for developers — a Safari extension that works entirely on your device.

Tap the toolbar icon, paste a token (or grab the text you've selected on the page), and instantly see:

• Pretty-printed, color-coded Header and Payload
• Human-readable timestamps — exp, iat and nbf shown in your local time with relative phrasing ("expires in 59 minutes")
• An at-a-glance expiry badge: valid, expired, or not yet valid
• Plain-English descriptions of standard claims (iss, sub, aud, and more)

Need to check a signature? JWT Lens verifies HS256/384/512, RS256/384/512, PS256/384/512 and ES256/384/512 using a secret or PEM public key you provide — all computed locally with the system's WebCrypto, never sent anywhere.

Privacy by design:
• No network requests — ever
• No analytics, no tracking, no accounts
• Nothing is stored: tokens and keys live only in the popup while you use it

Whether you're debugging OAuth / OIDC flows, inspecting a bearer token, or learning how JWTs work, JWT Lens keeps it quick, clear, and completely on-device.

Universal app: works in Safari on macOS, iOS and iPadOS.

## Rankings

- #1,823,050 — Overall

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Source: [Chrome-Stats](https://chrome-stats.com/d/id6774901745)