Base64 Encoder / Decoder

A developer-grade tool to convert text or images to Base64 and vice versa. 100% Local. Zero tracking.

Raw Text Input

Base64 Output

Input: 0 chars • 0 Bytes Output: 0 chars • 0 Bytes

🔒 PRIVACY NOTE: Your files are processed entirely within your web browser. We do not upload, store, or share your data with any servers. 100% secure and private.

How it works

A simple, smart, and completely secure local conversion tool.

Select Mode

Choose to Encode data into Base64, or Decode a string back. You can input text or upload files directly.

Input Data

Paste your text or string. If you decode a Base64 file or image, FileGulp will smartly detect it and show a preview!

Copy Safely

Click copy or download to grab your result. Everything runs locally in your browser memory for maximum privacy.

Frequently Asked Questions

Is this tool completely free?

Yes! File Gulp provides completely free file conversion tools with no hidden fees, no watermarks, and no registration required.

Are my files safe?

Absolutely. Unlike other converters, File Gulp uses modern WebAssembly technology to convert files directly on your device. Your files never leave your computer, ensuring maximum privacy.

Does it work on mobile devices?

Yes, our tool is fully responsive and works perfectly on smartphones and tablets, directly from your mobile browser.

Will the quality be affected?

No, we use high-quality algorithms to ensure your output files maintain the best possible quality during conversion.

Is there a file size limit?

Very large files may be limited by your device memory/browser performance. For normal image sizes, conversion is fast and seamless.

Encoding Std.

What is Base64?

Base64 is an encoding scheme used to represent binary data (like images or files) in an ASCII string format. This ensures data remains intact and isn't corrupted during transport across networks or within JSON payloads.

Security Warning

Base64 is NOT Encryption

A common mistake in development is assuming Base64 secures or hides data. It does not. Base64 is merely encoding and is universally decodable. Never use it to hide passwords or sensitive secrets.

Common uses for Base64 in Web Development

Data URIs: Encoding small images or SVGs into Base64 allows you to embed them directly inside CSS or HTML, reducing HTTP requests.
API Authentication: Standard Basic Authentication requires you to send your username and password encoded as a Base64 string in the HTTP Header.
JSON Payloads: JSON cannot natively store raw binary data. Files must be converted to Base64 strings before being sent via REST APIs.