Why this tool is useful
Use Base45 when binary data must fit efficiently inside alphanumeric QR payloads without the larger alphabet required by Base64.
Text & List Tools · runs locally
Base45 Text Encoder and Decoder
Transform UTF-8 text with the compact RFC 9285 Base45 alphabet used by QR-oriented data formats.
Ready. Your working data stays in this browser.
How it works
Two bytes become three Base45 characters and a final single byte becomes two; the decoder validates every group before UTF-8 reconstruction.
Practical example
The byte pair AB encodes as BB8, the worked example used by the Base45 standard.
Validation
The calculation is deterministic and explains validation errors instead of silently changing invalid input.
Privacy boundary
Input and output remain in this tab. Copy and download happen through browser APIs without a server upload.
Result passport
Every run reports its tool mode, timestamp and input/output size so transformed data can be audited.