🔒 Privacy First - No Data Storage
We do not store, log, or transmit your tokens. All comparison happens entirely in your browser. Your sensitive data never leaves your device. This tool is 100% client-side for maximum security.
The Token Comparator is a free online tool that allows you to compare two tokens character by character with beautiful visual highlighting. Perfect for verifying JWT tokens, API keys, authentication tokens, and more.
Whether you're debugging authentication issues, verifying token integrity, or comparing API keys between environments, this tool provides instant, secure comparison with detailed statistics.
Key Features
Character-by-Character Comparison
Compare tokens at the character level with visual highlighting. Matching characters are shown in green, mismatches in red with clear borders.
Detailed Statistics
Get comprehensive statistics including total characters, number of matches, mismatches, and match percentage for quick analysis.
100% Client-Side
All processing happens in your browser. Your tokens never leave your device, ensuring maximum security and privacy.
Show/Hide Tokens
Toggle token visibility for added security when working in shared environments. Copy tokens with one click.
Common Use Cases
JWT Token Verification
Compare JWT tokens to verify they match or identify differences in claims, signatures, or headers. Perfect for debugging authentication issues.
API Key Validation
Verify API keys match between environments or check if keys were copied correctly. Ensure consistency across development, staging, and production.
Authentication Token Debugging
Compare session tokens, OAuth tokens, or other authentication credentials to identify why authentication might be failing.
Hash & Checksum Verification
Compare hashes, checksums, or other cryptographic strings to verify data integrity and ensure files or data haven't been tampered with.
Try Token Comparator Now
Compare your tokens instantly with our free, secure, client-side token comparator. No registration required, no data stored.