When to use base64 encoder and decoder
Base64 represents bytes as printable characters and is commonly used in transport formats. This tool converts text to UTF-8 bytes before encoding, so accented letters and emoji are handled correctly. Decode reverses the operation and reports invalid input. Base64 is an encoding and provides no secrecy or encryption.
How it works
- Paste plain text or a Base64 string.
- Choose Encode or Decode.
- Copy the result.
Try this example
Hello, 世界!
Before you export or rely on the result
The decoder expects UTF-8 text, not arbitrary binary files. This tool uses standard Base64; JWT Base64URL segments belong in the JWT decoder.
Does this tool upload my input?
No. This tool processes input in your browser. Optional advertisements are separate third-party content and load only when you allow ads. See the privacy notice for hosting logs and advertising details.
Can I use the result without creating an account?
Yes. Base64 Encoder and Decoder is free to use without an account. Review the result against the limits above and the requirements of the app or document where you plan to use it.