Paste a JSON Web Token to decode its Base64URL header and payload in your browser. Inspect the declared algorithm, token type, claims, expiration time, and issued-at timestamp in readable JSON. Decoding does not verify the signature or prove that a token is trustworthy, so use the result for debugging and inspect sensitive production tokens carefully.
Privacy Protected
Decode JSON Web Tokens
Decode JWT header and payload locally. Inspect claims without server calls. Secure debugging. Fast, free, and 100% private. All processing happens locally.
Share Tool
Select files or drag & drop here
Processed 100% locally in your browser. Your files never touch an external server.
Choose File to Begin
100% Client-Side Privacy•No File Size Limits•Free Forever
About Decode JSON Web Tokens
FusioFiles 100% Client-Side Privacy Guarantee
Your files and data never leave your browser — processed directly on your device.
Zero Server UploadsExecution occurs entirely in browser memory via WebAssembly and HTML5 Canvas.
HIPAA & GDPR ReadySafe for confidential tax forms, medical records, financial sheets, and legal contracts.
Zero Cloud LatencyInstant results with no upload delays, server queues, or third-party tracking.
Automatic RAM PurgeBuffers and caches are automatically wiped clean the instant you close the tab.
1
Paste Token
Enter the eyJ... string.
2
View
Read the JSON data.
3
Save Your Output
Click the download or copy button to export your results to your device or clipboard.
Key Features
No Signature Check
Decodes payload without needing the secret key.
Date Parsing
Converts timestamps to readable dates.
Frequently Asked Questions
We decode it client-side only. However, for maximum security, rotate your tokens if you feel unsure.
Currently, we only decode the payload for debugging purposes.
Related Tools
View allLast updated on