5 Best JWT.io Alternatives (2026)

March 22, 2026 · 7 min read

JWT.io is the go-to tool for decoding JSON Web Tokens. Built by Auth0 (now Okta), it's been the default recommendation in every JWT tutorial for years. But it has limitations — and for certain use cases, an alternative might serve you better.

Security note: JWTs often contain sensitive data — user IDs, email addresses, roles, and permissions. Before pasting a production JWT into any online tool, check whether the tool processes data client-side (in your browser) or sends it to a server. If it's server-side, you're sharing that token with a third party.

Why Look for JWT.io Alternatives?

Privacy concerns — JWT.io's debugger loads external libraries and the site is owned by a commercial auth provider (Okta). While decoding is client-side, some developers prefer tools with no external dependencies.
Simplicity — JWT.io's interface includes signature verification, algorithm selection, and library recommendations. If you just want to see what's inside a token, that's a lot of UI for a simple task.
Additional features — Some alternatives offer features JWT.io doesn't: expiry countdown, claim explanations, multi-token comparison, or dark mode.
Offline use — JWT decoding doesn't require a server (it's just Base64 + JSON parsing). A fully client-side tool works even when you're offline.

Quick Comparison

Tool	Client-Side	Sig Verify	Claim Explain	Dark Mode	Signup
JWT.io	Yes*	Yes	Partial	No	No
UtilShed	Yes	No	Yes	Yes	No
token.dev	Yes	Yes	Yes	Yes	No
JWT Decoder (CLI)	Local	Yes	No	N/A	No
jwt-decode (npm)	Local	No	No	N/A	No

* JWT.io decoding is client-side, but the page loads external scripts and analytics.

1. UtilShed JWT Decoder

Best for: Quick, private JWT inspection with human-readable claim explanations.

UtilShed's JWT decoder runs 100% in your browser with zero external requests. Paste a token and instantly see the decoded header and payload with syntax highlighting. What sets it apart: it explains standard claims in plain English — iat shows "Issued At: March 22, 2026 at 4:30 PM", exp shows "Expires: in 2 hours", and registered claims like iss, sub, and aud are labeled.

It automatically detects expired tokens and flags them. Dark mode by default (the way it should be).

Pros: Fully client-side, claim explanations, expiry detection, dark mode, no external scripts, instant

Cons: No signature verification (decoding only — see note below)

Decode JWTs instantly — private, no signup, dark mode Open JWT Decoder

A Note on Signature Verification

UtilShed's decoder intentionally doesn't verify JWT signatures. Here's why: signature verification in the browser gives a false sense of security. Real signature verification should happen server-side, in your application's auth middleware, using a secret key you control. An online tool that says "signature verified" doesn't mean the token is trustworthy — it means the tool had the right key at that moment. If you need to debug signature issues, use your backend logs and key management tools.

2. token.dev

Best for: Full-featured JWT debugging with signature verification.

token.dev is a modern JWT debugger with a clean interface. It supports decoding, claim inspection, and signature verification for HMAC and RSA algorithms. The UI is well-designed with dark mode support and clear claim labeling.

It's the closest feature-for-feature alternative to JWT.io, with a more modern look and better UX.

Pros: Clean modern UI, signature verification, claim explanations, dark mode

Cons: Less well-known than JWT.io, fewer algorithm options

3. Command-Line Decoding

Best for: Developers who live in the terminal and want zero browser dependency.

You don't need any tool to decode a JWT — it's just three Base64-encoded segments. Here's a one-liner:

echo "eyJhbGciOiJIUzI1NiJ9.eyJzdWIiOiIxMjM0NTY3ODkwIn0.abc" \
  | cut -d. -f2 \
  | base64 -d 2>/dev/null \
  | jq .

Or with Node.js:

node -e "console.log(JSON.parse(Buffer.from(process.argv[1].split('.')[1], 'base64url')))" YOUR_TOKEN

Or install a dedicated CLI tool:

# Using jwt-cli (Rust)
cargo install jwt-cli
jwt decode YOUR_TOKEN

# Using step-cli
step crypto jwt inspect --insecure < token.txt

CLI decoding is the most private option — your token never touches a network.

4. jwt-decode (npm package)

Best for: Decoding JWTs programmatically in JavaScript/TypeScript applications.

If you need to decode JWTs in your code (not just inspect them manually), jwt-decode is the standard npm package. It's tiny (under 1KB), has zero dependencies, and works in both Node.js and browsers.

import { jwtDecode } from "jwt-decode";

const token = "eyJhbGciOiJIUzI1NiJ9...";
const decoded = jwtDecode(token);
console.log(decoded.sub);  // "1234567890"
console.log(decoded.exp);  // 1711234567

Important: jwt-decode does NOT verify signatures. It only decodes. Use it for reading token claims in frontend code (like checking expiry before making an API call), not for authentication decisions.

5. Browser DevTools

Best for: Quick inspection when you already have the token in a network request.

Your browser's DevTools can decode JWTs without any external tool. In the Console tab:

// Paste this in the browser console:
JSON.parse(atob("eyJzdWIiOiIxMjM0NTY3ODkwIn0"))

Or if you're inspecting an Authorization header in the Network tab, just copy the token value (after "Bearer "), split on dots, and Base64-decode the second segment. No tool needed.

Some browser extensions also add JWT decoding directly to DevTools, showing decoded tokens inline in the Network tab's headers.

When to Stick with JWT.io

JWT.io is still the right choice when:

You need signature verification — JWT.io's debugger supports HS256, HS384, HS512, RS256, RS384, RS512, ES256, ES384, ES512, PS256, PS384, and PS512
You want library recommendations — JWT.io maintains a list of JWT libraries for every programming language, with security audit status
You're sharing a link — JWT.io supports URL-encoded tokens in the URL, making it easy to share decoded tokens with colleagues

The Verdict

For quick token inspection, UtilShed's JWT Decoder is the fastest option — paste, read, done. No external scripts, no signup, instant decode with human-readable claim explanations.

For full debugging with signature verification, token.dev or JWT.io are your best bets. For maximum privacy, decode in the terminal or browser console — the token never leaves your machine.

Related Resources

How to Decode JWT Tokens — Complete Guide
UtilShed JWT Decoder — decode tokens instantly, client-side
Base64 Encoder/Decoder — decode JWT segments manually
JSON Formatter — pretty-print decoded JWT payloads
Unix Timestamp Converter — convert JWT exp/iat timestamps

All UtilShed tools are free, private, and run in your browser Browse All 100+ Tools