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File to Base64

Drop any file and get its Base64 representation. Useful for embedding assets in CSS, HTML, or JSON config files.

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BASE64

File → Base64

Reads any file and outputs its raw Base64 representation — without the data URI prefix.

Runs entirely in your browser

How it works

Text encoding uses the browser's built-in btoa and atob functions with proper UTF-8 handling. File reading uses the FileReader API — entirely within your browser, with no upload.

Your data stays local

All encoding and decoding happens inside your browser tab. The text or file you provide is never sent to a server — it stays entirely on your device.

Frequently asked questions

What files can I convert?

Any file your browser can read — images, PDFs, fonts, audio, and more.

Is there a file size limit?

There's no hard limit, but very large files (100 MB+) may slow down the browser.

Is the file uploaded?

No. The conversion uses the FileReader API which reads the file into memory locally.