Base64 Encoder & Decoder
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How to use Base64 Encoder & Decoder
- Choose your file (or drop it onto the page).
- Adjust the options shown.
- Select the action button and wait for it to finish.
- Review the result, then download it.
What to expect
A new file is created. Your original file is never modified.
- Files are limited to 25 MB.
- Base64 is encoding, not encryption — it protects nothing.
Frequently asked questions
Can I decode a data: URI?
Yes. Paste the whole data URI and the prefix is removed automatically.
Is my data uploaded anywhere?
No. The data is read and processed by JavaScript in your browser. Only the website's own code and assets are downloaded.
Do I need to create an account?
No. Every tool works without sign-up or login.
Is it safe for confidential documents?
Files are processed locally in your browser and never uploaded. Close the tab or select Clear to release them from memory.