Question 1

What is Base32 encoding?

Accepted Answer

Base32 is a binary-to-text encoding scheme defined in RFC 4648. It represents binary data using 32 characters from the uppercase alphabet (A-Z) and the digits 2-7. Base32 is case-insensitive and avoids visually similar characters like 0 (zero) and 1 (one). It is commonly used in TOTP/HOTP secrets for two-factor authentication, IPFS identifiers, and other applications requiring human-friendly encoded data.

Question 2

Where is Base32 used?

Accepted Answer

Base32 is widely used in: TOTP (Time-based One-Time Password) secrets for two-factor authentication apps like Google Authenticator and Authy, IPFS content addresses (CIDv1), Tor hidden service addresses (.onion), DNS-safe encodings (Base32 output is case-insensitive and contains no special characters), and some file systems that require case-insensitive naming.

Question 3

What is the difference between Base32 and Base64?

Accepted Answer

Base32 uses a 32-character alphabet (A-Z, 2-7) while Base64 uses 64 characters (A-Z, a-z, 0-9, +, /). Base32 produces longer output - 8 characters per 5 bytes (60% overhead) versus Base64's 4 characters per 3 bytes (33% overhead). Base32 is case-insensitive and safe for use in DNS names and file systems. Base64 is more compact and better suited for binary data in HTTP headers and JSON payloads.

Question 4

How does Base32 padding work?

Accepted Answer

Base32 uses the = character for padding to ensure the encoded output length is a multiple of 8. For example, encoding 1 byte produces 2 Base32 characters padded with 6 = signs (e.g., ME======). Encoding 5 bytes produces exactly 8 Base32 characters with no padding. Some implementations (like TOTP secrets) omit padding - this tool handles both padded and unpadded input when decoding.

כלים חינמיים למפתחי אתרים

מקודד / מפענח Base32

טקסט מפוענח

Base32 מקודד

כיצד פועל מקודד/מפענח Base32

מה הכלי עושה

מקרי שימוש נפוצים למפתחים

פורמטי נתונים, טיפוסים או וריאנטים

מלכודות נפוצות ומקרי קצה

מתי להשתמש בכלי הזה לעומת קוד