About this tool
Convert text to and from RFC 9285 Base45 over UTF-8 bytes, entirely in your browser.
Frequently asked questions
Where is Base45 used?
It encodes binary data into the QR-friendly alphanumeric set, notably for the EU Digital COVID Certificate.
How does the encoding work?
Bytes are taken in pairs and written as three Base45 characters; a lone trailing byte becomes two characters.