100% local · no upload

Base64 Encoder / Decoder

Encode text or files to Base64 — or decode Base64 back to text and binary files. Standard and URL-safe alphabets.

How it works

Drop your file or paste your content into the tool above.
Adjust the options — every change updates the preview instantly.
Download the result. Your file never leaves your browser.

Your files never leave this page

Every conversion runs entirely in your browser using WebAssembly. There is no upload, no server-side processing, no analytics, and no cookies. Open DevTools → Network during the operation and you will see zero outbound traffic.

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Topics covered

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