Free Online Base64 Encoder / Decoder Tool

Our free online Base64 Encoder / Decoder allows you to convert plain text into Base64 encoded format or decode Base64 strings back into human-readable text instantly. It supports UTF-8 character encoding, ensuring full compatibility with special symbols, accented letters, and emojis.

What is Base64 Encoding?

Base64 is a binary-to-text encoding scheme that represents binary data in an ASCII string format. It works by dividing binary data into 6-bit chunks, with each chunk mapped to one of 64 printable ASCII characters (A-Z, a-z, 0-9, +, and /, with = used for padding).

Common Use Cases for Base64

• Data Transmission: Ensures data remains intact without modification during transfer over media designed to deal with text (such as HTTP requests and email protocols like MIME).
• Embedding Images & Assets: Allows small images, SVGs, or fonts to be embedded directly into HTML or CSS files via Data URIs, reducing HTTP requests.
• API Tokens & Authorization Headers: Widely used in web development for encoding credentials in Basic Authentication headers and API payloads.

How to Use This Tool?

• To Encode: Enter or paste plain text into the top box and click Encode Base64.
• To Decode: Paste a Base64 string into the input box and click Decode Base64.
• Copy Result: Click Copy Result to quickly copy the output to your clipboard.