Decode a JWT and read its header and claims locally
Paste a JSON Web Token and read its header and payload in your browser. The token is decoded locally and the signature is never verified.
JWT Decoder workspace
Drop files here or browse files
Drop a file here or browse to start.
- Header and payload side by side
- Decode only, signature never checked
- Any algorithm, including unsigned tokens
- Bearer tokens stay in your tab
EditPDFKit base64url-decodes the header and payload segments of a JSON Web Token inside the page and displays both as formatted JSON, without verifying the signature and without any network request.
Built and maintained by Akash Kore · About
How to Use the Free Online JWT Decoder Studio in 4 Steps
Simple 4-step walkthrough for fast, secure processing
Paste the token
Drop the full token into the Paste JWT box, starting at eyJ and without the word Bearer.
Read the Header pane
It shows alg and typ, plus kid when the issuer rotates keys — the field you need to look up the right public key.
Read the Payload pane
Here are the claims: sub, iss, aud, scopes, and the raw exp and iat timestamps.
Select what you need
Both panes are selectable text, so you can highlight a single claim and copy it with your usual shortcut.
EditPDFKit vs. Traditional Cloud Services for JWT Decoder
Why thousands of privacy-conscious users choose EditPDFKit over cloud converters
| Feature | EditPDFKit (editpdfkit.com) | Traditional Cloud Tools (iLovePDF, Smallpdf) |
|---|---|---|
| Where Files Are Processed | Directly on Your Device (Zero Uploads) | Uploaded to Remote Company Servers |
| Privacy & Safety | Zero Uploads • Files Never Leave Your Device | Files Uploaded and Retained on Remote Company Servers |
| Local Hardware Acceleration | Uses your device's multi-core CPU and WebAssembly for instant output | Processes on shared cloud servers with upload and download delays |
| Built-in Privacy Vault | Saved Privately on Your Device (View or delete anytime) | Saved on Cloud Servers (Cannot verify if or when deleted) |
| Daily Usage Limits | 100% Unlimited & Free Forever | Free tiers commonly cap daily files; check their pricing pages |
| File Size Limits | No Limits (Process files of any size) | Free tiers commonly cap upload size; check their pricing pages |
| Works Without Internet | Yes • 100% Offline (Works without Wi-Fi) | No • Fails without constant internet connection |
| Account & Sign In | No Signup • No Login • Zero Email Required | Commonly requires an account or email to use fully |
| Watermarks on Your Files | 100% Clean • No Watermarks Ever | Free tiers commonly add a watermark or charge to remove it; check their pricing pages |
How JWT Decoder Works: Keep Your Files Safe & Private
See step-by-step how your files are processed. Everything happens right inside your browser — your files are never uploaded to the internet or shared with anyone.
1. Open on Your Device
When you pick a file, your browser opens it directly on your computer or phone. Your document stays on your device and is never uploaded anywhere.
2. Process in Your Browser
Your device does all the work right inside your browser. Because there are no server queues or waiting lines, your files are processed instantly.
3. Save in Private Vault
When you save your work, your file is stored securely inside your browser's private vault on your device. You can view or reopen it anytime, even without internet.
4. Download, Reuse, or Delete
Download your finished file, send it directly to another tool without re-uploading, or click 'Clear Vault' to permanently erase your files anytime with one click.
How You Can Prove Your Files Never Leave Your Device
Open this tool, turn off your Wi-Fi or turn on Airplane Mode, and drop your file. It will still edit, convert, or compress and let you download the result! This proves the tool works completely offline without sending anything to any server.
Press F12 on your keyboard (or right-click anywhere and choose "Inspect"), click on the Network tab, and process your file. You will see 0 bytes of your file sent over the web — absolute proof of 100% privacy.
JWT Decoder Technical Specifications & Device Capabilities
Key features, device compatibility, and supported file types
Runs Directly on Your Device
Processed by your browser with zero waiting or upload lag
100% Private (0 Files Uploaded)
Safe for bank statements, IDs, tax forms, and confidential files
100% Watermark-Free
Clean original documents ready for official submissions
.txt
Drag & drop or paste directly from clipboard (Ctrl+V)
100% Free With No Limits
No account needed, no daily limits, no paywalls
Works on All Phones & Computers
iPhone, Android, Windows PC, Mac, iPad, and Chromebook
Need to Hit an Exact File Size Upload Limit?
Online job boards, immigration visa portals, universities, and court e-filing systems enforce strict KB ceilings. Select a calibrated target size solver below to compress without losing readability.
Legal & Court Portals
Strict compliance while keeping vector text razor sharp.
Exam, Job & Visa Portals
The ceiling UPSC, SSC, bank exam and visa forms set most often.
Job Portals & HR Forms
Ideal for resume attachments, certificates, and multi-page scans.
Email & Universities
Reduces large PDF decks under standard mail attachment limits.
Any Custom Limit
Set an exact target size with interactive compression preview.
Looking for a Free Alternative to Popular Cloud Tools?
Unlike cloud-based services that upload your files to remote servers or enforce hourly limits, EditPDFKit runs 100% in your browser.
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Frequently Asked Questions About JWT Decoder
Everything you need to know about JWT Decoder on editpdfkit.com