Free browser utility
Base64 Encoder and Decoder
Unlike basic btoa examples, this tool correctly handles Chinese, Japanese, emoji and other Unicode text.
✓ Local processing✓ No registration✓ No file upload
Loading tool…
Before
Hello 你好 😀
→
After
SGVsbG8g5L2g5aW9IPCfmIA=
How to use Base64 Encoder and Decoder
- Paste text or select local files in the tool area.
- Choose any options that match the source data.
- Run the conversion or repair and review the preview.
- Copy the result or download the generated file.
Privacy and local processing
This project performs processing, document generation or calculations in your browser. The page does not include an upload endpoint, analytics script or remote processing API call. Avoid pasting sensitive data into websites you do not control.
Frequently asked questions
Can it decode URL-safe Base64?
Yes. Hyphens and underscores are normalized before decoding.
Is Base64 encryption?
No. Base64 is an encoding and provides no confidentiality.