Our Base91 Encoder and Decoder is a powerful tool that converts text between regular format and Base91 encoding. Base91 is one of the most efficient binary-to-text encoding schemes available, using 91 printable ASCII characters and processing 13 or 14 bits at a time to achieve maximum compression.

Base91 achieves about 30% better compression than Base64 by using a larger character set and a unique bit-processing approach. This makes it ideal for situations where every character counts, such as in URL parameters, email attachments, or any text-based protocol where data size matters.

This tool provides real-time encoding and decoding with instant feedback, error detection for invalid Base91 input, and support for different character encodings. The interface is designed for both quick conversions and handling larger text blocks efficiently.

All processing happens locally in your browser, ensuring your data remains private and secure. No data is ever sent to external servers or stored anywhere. The tool works offline and provides instant results without any external dependencies.