Base32 Encoder & Decoder (RFC 4648)
Encode and decode RFC 4648 Base32 strings and 2FA / TOTP authentication secret keys.
Execution runs 100% locally inside the browser sandbox using HTML5 Canvas, Web Cryptography Subtle API, and Web Workers. No data is ever transmitted across the network.
Zero network latency. Operates completely offline with zero dependencies on third-party backend servers or cloud services.
Built according to official RFC specifications, cryptographic test vectors, and enterprise-grade data transformation standards.
How to Use Base32 Encoder & Decoder (RFC 4648)
Choose between Encode Text to Base32 or Decode Base32 to Text.
Type or paste your text string or RFC 4648 Base32 encoded token.
Copy the processed output directly to your clipboard.
Frequently Asked Questions
What is Base32 encoding used for?
Base32 uses a 32-character alphabet (A-Z, 2-7) designed to be human-readable and case-insensitive, commonly used in 2FA authenticator seeds (Google Authenticator) and DNS labels.
How does Base32 differ from Base64?
Base32 uses only uppercase letters and digits 2-7, avoiding visually ambiguous characters like '0', 'O', '1', 'I', making it easier to read and transcribe manually.
Related Unit & Code Converters Tools
View all →Calculate exact file download & transfer times across bandwidth speeds.
Convert Bytes, KB, MB, GB, TB, PB with binary vs decimal bases.
Convert CSV to JSON and JSON to CSV with custom delimiters and exports.
Encode plain text to Base64 or decode Base64 back to text.