Encode text to Base64 or decode Base64 strings back to plain text instantly. Supports Unicode characters and file encoding.
Base64 is a binary-to-text encoding scheme that represents binary data using 64 ASCII characters (A-Z, a-z, 0-9, +, /). It was designed to safely transmit binary data through text-only channels like email (MIME), URLs, and HTTP headers.
Every 3 bytes (24 bits) of input are split into four 6-bit groups. Each 6-bit value (0-63) maps to one of 64 characters. If the input isn't a multiple of 3 bytes, padding characters (=) are added. This is why Base64 strings often end with one or two equals signs.
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Web developers
Embed small images as data URIs in CSS/HTML to reduce HTTP requests.
API developers
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DevOps engineers
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Email developers
Understand how MIME attachments encode binary files for email transport.
Base64 is a binary-to-text encoding scheme that represents binary data as an ASCII string. It is commonly used to embed images in HTML/CSS, transmit data over text-based protocols like email, and encode data in URLs.
No. Base64 is an encoding scheme, not an encryption algorithm. It does not provide any security - anyone can decode Base64 data. Use proper encryption (like AES) for securing sensitive information.
Base64 encoding increases data size by approximately 33%. This is because every 3 bytes of binary data are represented as 4 ASCII characters. This tradeoff is accepted because the resulting text is safe for transmission over text-based systems.