Base64 Encoder / Decoder
Convert any text or file to Base64 encoding and back. Supports text encoding/decoding, file to Base64 conversion (images, documents), and Base64 to file download. Essential for developers working with APIs and data URIs.
About Base64 Encoding
What is Base64?
Base64 is a binary-to-text encoding scheme that converts binary data into a set of 64 ASCII characters. It is commonly used to embed images in HTML/CSS, transmit data in APIs, and encode email attachments.
URL-safe Base64
Standard Base64 uses + and / characters which have special meaning in URLs. URL-safe Base64 replaces these with - and _ making the output safe for use in URLs and filenames.
Size Overhead
Base64 encoding increases data size by approximately 33%. Every 3 bytes of input produces 4 bytes of Base64 output. This trade-off enables safe text-based transmission of binary data.
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