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Base32 Encoder

Developer Tools

Encode text and data to Base32 format.

⚡ Instant🔒 Private, in your browser🆓 Free, no sign-up👥 For developers
Your data never leaves your browser. We do not store inputs.

What Base32 Encoder does

The Base32 Encoder converts text or data into Base32 format, the RFC 4648-defined encoding that uses a 32-character alphabet (A-Z and 2-7) instead of Base64's mixed-case scheme — the format used by things like TOTP secret keys and some filesystem- and DNS-safe identifiers. Type or paste your input and get the encoded, or decoded, output instantly in your browser.

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Reviewed by the FreeToolsVerse team · Last updated · How we check our tools

How to use Base32 Encoder

  1. Paste or type the text you want to encode
  2. Click Encode to generate the Base32 output (or switch to Decode for the reverse)
  3. Review the encoded or decoded result
  4. Copy the output for use in your application or config

Who should use it

Made for developers. Typical uses:

  • Generating or inspecting a Base32-encoded TOTP secret key for two-factor authentication setup
  • Encoding identifiers that need to be case-insensitive and filesystem- or URL-safe
  • Decoding a Base32 string found in a config file or API response to see its original content

Frequently asked questions

Is the Base32 Encoder free to use?
Yes, completely free.
Is my data uploaded anywhere?
No, encoding and decoding happen entirely in your browser.
How is Base32 different from Base64?
Base32 uses a 32-character alphabet (A-Z, 2-7) with no lowercase letters or symbols, making it safe for case-insensitive systems, while Base64 packs more data per character using a 64-character set.
Does it follow the RFC 4648 standard?
Yes, it uses the standard Base32 alphabet and padding rules.
Can I decode Base32 back to the original text?
Yes, switch to decode mode and paste the Base32 string.

Learning resources

Explore more in Developer Tools, read the guides and articles, or see how we test our tools.

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