Base64 encode and decode, text or files
Text and file modes, both directions.
Files stay on your device. No accounts. Free.
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About this tool
Encode text or any file to Base64, or decode a Base64 string back, as text on screen, or as a downloadable binary file when the content isn't text. UTF-8 and URL-safe variants with missing padding are handled automatically.
Useful for data URIs, basic-auth headers, API payloads and config values. Everything runs on your device, so credentials you encode here stay yours.
How it works
- Paste your input, or drop a text file onto the box.
- The output updates live as you type.
- Copy it to the clipboard, or download it as a file.
Frequently asked questions
Is Base64 encryption?
No, and this matters: Base64 is just a different alphabet for the same bytes, anyone can decode it instantly. Use it for transport and embedding, never for hiding secrets.
Can I encode a file, not just text?
Yes. Switch to file mode and drop any file, image, PDF, binary, and you get its Base64 string, ready for a data URI or an API payload. Decoding works in reverse and offers a download when the result is not text.
Why does my Base64 string fail to decode elsewhere?
Usually it is the URL-safe variant, which swaps + and / for - and _ and often drops the trailing = padding. This tool detects and accepts both variants automatically.