Base64 Encoder
Encode or decode Base64 text safely.
How to use the Base64 Encoder
Paste your input
Drop the snippet, token or document into the editor. Invalid characters are highlighted as soon as parsing fails.
Choose how to process it
Select formatting, validation or conversion options. Results are calculated as you type, with no submission step.
Copy or download
Use the copy button for a clean result, or download it when the output is large.
What Base64 Encoder is for
Convert UTF-8 text to Base64 and back, with full Unicode support. Useful for data URLs, headers and quick payload inspection.
The Base64 Encoder is part of the Developer collection on ToolFlow. It is designed for one concrete job: encode or decode Base64 text safely. Everything runs client-side, so you can use it with sensitive material without creating a copy on someone else's server.
Common use cases
- Encode a token for a header
- Decode a data URL
- Move UTF-8 text through ASCII channels
Good to know
- No account is required, and there is no usage limit on the browser tool.
- Processing happens locally. Files are read from disk and the result is written back to your downloads folder.
- Results are reproducible: the same input and options produce the same output, with no hidden server round-trip.
- If the tool needs a live data source, the page states it explicitly instead of silently failing.
Base64 Encoder FAQ
The questions people ask before using this tool.