Files processed locally in your browser
Base64 Encode & Decode
Encode or decode Base64 text and files privately in your browser.
Or drop a file to encode as Base64
Processed locally — large files may be slow
How to use this tool
- Choose encode or decode.
- Paste text or drop a file.
- Copy the result.
When to use Base64
Base64 is common in data URLs, email attachments, and APIs.
Why use FreeTools?
Unlike many online utilities, FreeTools processes your files in the browser using modern Web APIs and WASM libraries. That means faster results on your machine, no waiting for uploads, and a clear privacy story: we never see your documents or photos. No account is required — open the page, drop a file, download the result.
FAQ
Is file encoding private?+
Yes. Files are read locally and never uploaded.
Why did decode fail?+
Input must be valid Base64.
Related tools
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