Encoding
Base64 Decoder
Decode UTF-8 Base64 text locally in your browser.
What is Base64 Decoder?
Decode Base64-encoded UTF-8 text with clear validation errors. Your input is processed on your device and is never sent to a server.
How to use Base64 Decoder
- Paste or type your input into the editor.
- Use the tool action to process your data in the browser.
- Review the output, then copy or download it if needed.
Key features
- Private browser-based processing.
- No account or login required.
- Works without uploading your data.
- Fast results for common developer tasks.
Frequently asked questions
Why can’t I decode my Base64?
The input may not be valid Base64, or it may represent binary data rather than UTF-8 text.
Is my data uploaded?
No. Base64 decoding happens entirely in your browser.