BASE64 ENCODER
Instantly encode text into Base64 format or decode Base64 strings back to plain text.
Plain Text:
Base64 String:
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Instantly encode text into Base64 format or decode Base64 strings back to plain text.
Base64 is a binary-to-text encoding scheme that converts binary data into a set of 64 printable ASCII characters. It was originally designed to safely transmit binary data through text-based protocols like email (MIME), HTTP headers, and XML documents. The encoding process takes every 3 bytes of input and converts them into 4 Base64 characters, resulting in an output approximately 33% larger than the original. Despite this size increase, Base64 is invaluable because it guarantees that encoded data can pass through any system that supports ASCII text without corruption.
When debugging API integrations, email systems, or authentication tokens, developers frequently need to encode or decode Base64 strings. Our tool provides instant, bidirectional conversion with support for Unicode text including non-Latin characters and emoji. Unlike many online tools that send your data to a remote server, our encoder operates entirely within your browser—especially important when decoding sensitive authentication headers or API tokens.
No. Base64 is an encoding scheme, not encryption. It does not provide any security—anyone can decode a Base64 string without a key. Never use Base64 to hide or protect sensitive data.
Base64 converts every 3 bytes into 4 characters, resulting in approximately 33% size increase. The padding character = is added when input length is not a multiple of 3.
Standard Base64 uses + and / which have special meanings in URLs. Base64url replaces these with - and _ and omits padding. It is used in JWTs and URL-safe contexts.