Base64 Encoder/Decoder

Encode and decode Base64 strings instantly

Convert text, images, and data to Base64 format and vice versa

Language:

Mode

Input

Type or paste your text or Base64 string

Output

Encoded or decoded result

Tips

• Base64 encoding increases data size by approximately 33%
• Base64 is commonly used for embedding images in HTML/CSS
• Base64 strings are URL-safe when using the URL-safe variant
• Always validate Base64 strings before decoding to avoid errors

Base64 is a binary-to-text encoding scheme that represents binary data in an ASCII string format. It's widely used in web development for encoding data URLs, API authentication, and data transmission.

Did You Know?

Base64 encoding was first standardized in RFC 1421 in 1993, originally designed for encoding email attachments.

Base64 uses 64 characters: A-Z, a-z, 0-9, plus '+' and '/' (with '=' for padding), representing 6 bits per character.

Base64 encoding increases data size by approximately 33%, making it inefficient for large files but useful for embedding small data in text formats.

These facts help provide context and educational value about the tool's purpose and history.