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Base32 Encoder Decoder

Encode text or hex to Base32 (RFC 4648) and decode Base32 strings back to UTF-8 instantly in your browser.

Updated

What is the Base32 Encoder Decoder?

Instantly encode any text or hex data to Base32 (RFC 4648 standard) or decode Base32 strings back to readable UTF-8 text. This free online tool runs entirely in your browser with no data sent to servers.

Base32 is widely used for encoding secrets in two-factor authentication (TOTP), generating human-readable identifiers, and safely transmitting binary data in text-only environments. Our tool supports full Unicode, hex input, separator ignoring, and live conversion with helpful statistics.

How it works

Base32 converts binary data (bytes) into a text string using a 32-character alphabet: A-Z and 2-7. Each character represents 5 bits of data.

Encoding Process

  1. Convert input text to UTF-8 bytes
  2. Group bits into 5-bit segments (padding with zeros if needed)
  3. Map each 5-bit group to a character in the Base32 alphabet
  4. Add = padding so the output length is a multiple of 8 characters

Decoding Process

  1. Remove padding (=) and optional separators
  2. Convert each Base32 character back to 5 bits
  3. Reassemble into 8-bit bytes (removing padding bits)
  4. Decode bytes back to UTF-8 text

The tool automatically handles case-insensitivity, common separators (spaces, dashes), and provides both text and hex output for decoded results.

Examples

Encode Hello World

Convert a simple greeting to Base32 format

Hello, World!
JBSWY3DPFQQFO33SNRSCC===

Decode TOTP Secret

Convert a common Base32 secret back to readable text

JBSWY3DPK5XXE3DEKNSWG4TFOQ======
HelloWorldSecret

Hex to Base32

Encode binary data provided as hex

48656c6c6f
JBSWY3DP

Frequently asked questions

What is Base32 used for?

Base32 is commonly used in TOTP/2FA secrets (like Google Authenticator), generating compact case-insensitive IDs, encoding binary data for URLs or emails, and situations where Base64 might introduce ambiguous characters (+ / =).

Does this tool support RFC 4648?

Yes. It implements the official RFC 4648 Base32 standard with correct padding and alphabet (A-Z, 2-7). It also handles common real-world variations like mixed case and separators.

Can I encode emoji and international characters?

Yes. The tool fully supports UTF-8 encoding and decoding, so you can process any Unicode text including emojis, accented characters, and non-Latin scripts.

Is my data private?

Completely. All encoding and decoding happens locally in your browser. Nothing is sent to any server.

What about hex input?

You can switch to "Hex Bytes" mode to encode raw binary data provided as a hexadecimal string (e.g., 48656c6c6f for "Hello").

Why use Base32 instead of Base64?

Base32 is case-insensitive, avoids ambiguous characters (like + / in Base64), and is more human-readable while still being compact. It's especially popular for security tokens and identifiers.

How do I copy the result?

Click the copy button next to any output field. Results update live as you type.

Does it handle padding correctly?

Yes. The tool automatically adds and removes = padding according to the RFC 4648 specification.

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