The ultimate Chrome extension for developers. Encode/decode text, inspect JWT tokens, and convert images to Base64 — all from your browser. No external websites needed.
Five powerful tools packed into a lightweight extension. No more switching between websites.
Instantly convert any text, file, or URL to Base64 and back. Perfect for API testing, data serialization, and debugging.
Paste any JWT token and instantly decode its payload to a human-readable JSON format. Inspect claims, check expiration, and verify token data without external tools.
Right-click any image on a webpage and copy its Base64 string. Ideal for embedding images in CSS, HTML emails, or JSON payloads.
Encode or decode entire files — images, PDFs, JSON — within the extension. Drag & drop support with no upload limits.
Copy results instantly with one click. Use customizable keyboard shortcuts and the omnibox keyword "64" for quick access.
Clean, distraction-free interface with both light and dark themes. Snappy performance with near-zero resource usage — it won't slow your browser down.
Encode and decode text, images, audio, video, and more.
Plain Text
Images
Audio
Video
JSON
PDF & Docs
Base64 Strings
JWT Tokens
Paste any JWT token and instantly decode its payload to a clean, pretty-printed JSON view. No need for external websites like jwt.io — everything runs locally in your browser for maximum privacy.
{
"sub": "1234567890",
"name": "John Doe",
"iat": 1516239022,
"exp": 1716239022
}
Convert images to Base64 without leaving your page. Just right-click any image and select "Copy image to Base64" from the context menu. The Base64 string is instantly copied to your clipboard.
Watch how Base64Coder works — encoding, decoding, JWT inspection, and more.
Experience the extension without installing — it works exactly like the real thing.
Drag & Drop to Upload File
Join developers who trust Base64Coder for their daily encoding, decoding, and JWT inspection needs.
Privacy First: No data collection, no external requests, no tracking. Everything runs locally.
Yes! Base64Coder is completely free with no hidden costs, premium tiers, or in-app purchases. It's open-source software under the MIT license.
Never. All encoding, decoding, and JWT inspection happens 100% locally in your browser. No data is ever sent to external servers.
JWT (JSON Web Token) payload decoding lets you inspect the claims inside authentication tokens used by most modern APIs. You can verify user info, permissions, and check expiration without third-party tools.
Type "64" in address bar, press Tab, then type or paste your text. Press Enter to encode it to Base64 instantly — no need to open the extension.
Absolutely! You can drag and drop files into the extension to encode them to Base64, or paste Base64 strings to decode them back into their original format.
Yes! Base64Coder has a beautiful dark theme by default and also supports light mode. It follows your system preference or you can toggle manually.