JWT Token Viewer
Decode and inspect JSON Web Tokens (JWT). View header, payload, and signature. All processing happens locally in your browser.
100% Private & Secure
Your data never leaves your browser
How to Decode JWT Tokens Online?
Paste Token
Copy and paste your JWT token into the input field. The tool accepts any valid JWT format.
View Decoded Parts
Instantly see the decoded header, payload, and signature. Expiration status is automatically checked.
Analyze Claims
Review all claims including issuer, expiration, and custom data. Copy any part with one click.
Why Use BrowserKits JWT Viewer?
100% Client-Side Processing
Your JWT tokens NEVER leave your browser. Safe for decoding production tokens with sensitive claims.
Instant Decoding
See decoded content in real-time. No server delays - perfect for debugging authentication issues.
Expiration Detection
Automatically checks and displays token expiration status. Know instantly if your token is valid.
Completely Free
No limits, no registration, no hidden fees. Decode unlimited JWT tokens.
Use Cases
Auth Debugging
Debug authentication issues by inspecting token claims, expiration times, and issuer information.
Token Inspection
View the full payload of JWT tokens to verify user permissions, roles, and custom claims.
Security Audit
Audit tokens to ensure proper algorithm usage and identify potential security vulnerabilities.
How It Works: Client-Side Processing
Your privacy is our priority. Here's why our approach is different:
Base64 Decoding
Decodes the Base64URL-encoded header and payload sections of the JWT to reveal their contents.
Expiry Checking
Automatically checks the 'exp' claim and displays token validity status with human-readable times.
No Server Calls
All decoding happens locally in your browser. Your tokens never leave your device.
Frequently Asked Questions
Is my JWT token sent to any server?
No, absolutely not. All JWT decoding happens entirely in your browser using JavaScript. Your tokens never leave your device - this is critical for tokens containing sensitive user data or permissions.
Can this tool verify JWT signatures?
This tool decodes and displays JWT content but doesn't verify signatures (which requires the secret key). It's designed for inspection and debugging, not signature validation.
What JWT claims are displayed?
The tool displays all standard claims (iss, sub, aud, exp, nbf, iat, jti) and any custom claims in your token. Expiration time is automatically converted to a readable format.
How to Decode JWT Tokens Online?
Paste Token
Copy and paste your JWT token into the input field. The tool accepts any valid JWT format.
View Decoded Parts
Instantly see the decoded header, payload, and signature. Expiration status is automatically checked.
Analyze Claims
Review all claims including issuer, expiration, and custom data. Copy any part with one click.
Why Use BrowserKits JWT Viewer?
100% Client-Side Processing
Your JWT tokens NEVER leave your browser. Safe for decoding production tokens with sensitive claims.
Instant Decoding
See decoded content in real-time. No server delays - perfect for debugging authentication issues.
Expiration Detection
Automatically checks and displays token expiration status. Know instantly if your token is valid.
Completely Free
No limits, no registration, no hidden fees. Decode unlimited JWT tokens.
Use Cases
Auth Debugging
Debug authentication issues by inspecting token claims, expiration times, and issuer information.
Token Inspection
View the full payload of JWT tokens to verify user permissions, roles, and custom claims.
Security Audit
Audit tokens to ensure proper algorithm usage and identify potential security vulnerabilities.
How It Works: Client-Side Processing
Your privacy is our priority. Here's why our approach is different:
Base64 Decoding
Decodes the Base64URL-encoded header and payload sections of the JWT to reveal their contents.
Expiry Checking
Automatically checks the 'exp' claim and displays token validity status with human-readable times.
No Server Calls
All decoding happens locally in your browser. Your tokens never leave your device.
Frequently Asked Questions
Is my JWT token sent to any server?
No, absolutely not. All JWT decoding happens entirely in your browser using JavaScript. Your tokens never leave your device - this is critical for tokens containing sensitive user data or permissions.
Can this tool verify JWT signatures?
This tool decodes and displays JWT content but doesn't verify signatures (which requires the secret key). It's designed for inspection and debugging, not signature validation.
What JWT claims are displayed?
The tool displays all standard claims (iss, sub, aud, exp, nbf, iat, jti) and any custom claims in your token. Expiration time is automatically converted to a readable format.