Data and files
Base64 encoder and decoder
Encode or decode UTF-8 text as standard or URL-safe Base64.
UTF-8 text, up to 100,000 UTF-16 units. Base64 is encoding, not encryption. Only spaces, tabs and CR/LF are ignored when decoding. Standard alphabet includes padding; URL-safe omits it. Nothing is sent or saved.
What this tool does
Encode or decode UTF-8 text using standard or URL-safe Base64 with padding and pad-bit validation.
How to use it
- Enter text or Base64 according to the selected operation.
- Choose standard with padding or URL-safe without padding.
- Process and copy the full result even if the preview is partial.
Verifiable example
- Input
- Text hello, standard encoding.
- Expected result
- aGVsbG8=; decoding returns hello.
Limitations to review
- Base64 is not encryption and does not hide secrets. This tool accepts UTF-8 text, not arbitrary binary files.
- Up to 100,000 UTF-16 units. Only spaces, tabs and CR/LF are ignored when decoding; invalid UTF-8 is rejected.
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Browse all guides. Local processing: the page downloads HTTP resources but does not send files or input data to a server for these functions.