JWT Decoder
FreePaste a JWT token to instantly decode and inspect its header, payload, and signature. View claims like expiration time, issuer, and audience in a human-readable format. Check if the token is expired and verify its structure. Essential for debugging authentication flows, API integrations, and OAuth implementations.
How It Works
Upload or enter your data
Drag and drop your file or paste your content into the tool input area.
Configure options
Adjust settings and preferences to get exactly the output you need.
Get your result
Download your processed file or copy the output. Everything happens in your browser.
Frequently Asked Questions
You can view the header (algorithm and token type), payload (all claims including sub, iss, exp, iat, and custom claims), and signature status. Timestamps are shown in both Unix and human-readable formats.
Yes, if the token contains an 'exp' (expiration) claim, our decoder automatically checks whether the token is expired and shows the time remaining or time since expiration.
Yes, all decoding happens entirely in your browser. Your token is never sent to any server. JWTs are base64-encoded (not encrypted), so anyone with the token can read the payload.
Related Tools in Developer Tools
JSON Formatter & Validator
Format, validate, and beautify JSON data instantly
Base64 Encode/Decode
Encode and decode Base64 strings and files
URL Encode/Decode
Encode and decode URL components and query strings
HTML/CSS/JS Minifier
Minify HTML, CSS, and JavaScript to reduce file sizes
Regex Tester
Test and debug regular expressions with real-time matching
Color Picker & Converter
Pick colors and convert between HEX, RGB, HSL, and more
Markdown to HTML
Convert Markdown to clean, semantic HTML
Code Beautifier
Format and beautify code in 20+ programming languages