Convert strings between plain text and Base91 format with this free online Base 91 Encoder / Decoder. Type or paste content into the editor, or import a supported file to begin the conversion process. Once completed, the converted text can be copied or saved for later use.
Base91 encoding is used when binary information must be transferred or stored in text form with improved space efficiency. It is often applied in software utilities, communication protocols, data serialization tasks, and systems that exchange information through text-based channels.
Understanding Base 91 Encoder / Decoder
Base91 is an advanced text encoding technique that maps binary data to a collection of 91 printable characters. Its design aims to achieve higher efficiency than several traditional binary-to-text encoding methods by reducing the amount of additional characters required.
During encoding, raw bytes are transformed into sequences of printable symbols. Decoding performs the reverse operation, reconstructing the original byte stream from the encoded representation while preserving the underlying information.
Base91 Examples
Example 1 – Encoding
Text:
OpenAIConverted Base91:
@t_1Bu3BExample 2 – Encoding
Text:
Encode MeConverted Base91:
NoX<5+UC06yExample 3 – Decoding
Base91:
fG^FDecoded Text:
ABC