Encode and decode Base32 format online
Text Tools
About This Tool
Base32 Converter is an online tool that encodes text to Base32 format and decodes Base32 strings back to plain text using the RFC 4648 alphabet. It supports one-click mode switching, sample data loading, and instant conversion with clear error feedback. All processing happens locally in your browser with no data sent to any server.
Key Features
- Bidirectional Base32 encoding and decoding using RFC 4648 alphabet (A-Z, 2-7)
- One-click mode switching between encode and decode
- Side-by-side input and output panels for easy comparison
- Built-in sample data to quickly test encoding and decoding
- Clear status feedback with success and error messages
- One-click clear to reset both input and output fields
Use Cases
- Encode data for TOTP secret keys and multi-factor authentication systems
- Decode Base32 strings from DNSSEC records for debugging
- Convert data for legacy systems that require Base32 encoding
- Verify Base32 encoded content during development and testing
- Encode binary data for case-insensitive transport or storage
base32
encoding
decoding
rfc4648
Frequently Asked Questions
What is the Base32 Converter?
Base32 Converter is an online tool that encodes text to Base32 format and decodes Base32 strings back to text using the RFC 4648 alphabet. It runs entirely in your browser with no data sent to any server.
What alphabet does Base32 encoding use?
Base32 uses the alphabet A-Z and 2-7 (ABCDEFGHIJKLMNOPQRSTUVWXYZ234567) as defined in RFC 4648. This makes it case-insensitive and avoids visually ambiguous characters like 0, 1, 8, and 9.
How do I switch between encode and decode modes?
Click the Encode or Decode button at the top of the tool to switch modes. The input and output panels will clear automatically, and you can then enter your text or Base32 string and click Convert.
Is my data safe when using the Base32 Converter?
Absolutely. All encoding and decoding happens locally in your browser. No data is uploaded to any server, ensuring your information remains completely private and secure.
Can I use the Base32 Converter on my phone?
Yes, the Base32 Converter is fully responsive and works on all devices including smartphones, tablets, and desktop computers. On smaller screens the input and output panels stack vertically.