Base45 Decode
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Converted locally in your browser with UTF-8 safe TextEncoder and TextDecoder handling. Your text stays only on this page.
Decode Base45 text
Convert Base45 (RFC 9285) back into readable text. Groups of three symbols become two bytes and a trailing group of two becomes one byte, then the bytes are interpreted as UTF-8. The space character is a valid Base45 symbol, so it is preserved; symbols outside the alphabet or out-of-range groups are reported as an error.
When to use this tool
Use Base45 (RFC 9285) when you need to pack binary data into a QR code's alphanumeric mode efficiently, such as building or inspecting EU Digital COVID Certificate (DCC) and similar QR payloads.
Privacy and limitations
This conversion runs locally in your browser. Base45 is an encoding format, not encryption, so anyone can decode the result if they have the encoded text. It is plain Base45 only — no QR generation and no zlib or CBOR (DCC) layering.