Base64 Encoder

Base64 is an encoding scheme that represents data using only 64 safe characters: A–Z, a–z, 0–9, '+' and '/', with '=' as padding. It exists because many systems — email bodies, URLs, JSON strings, HTTP headers — can mangle raw binary data or special characters. Encoding to Base64 turns anything into plain, transport-safe ASCII.

This encoder converts your text to UTF-8 first and then encodes it, which means emoji, accented letters, and non-Latin scripts encode correctly — something naive Base64 tools (and JavaScript's raw btoa function) get wrong.

The output appears live as you type. Expect it to be about 33% longer than the input: Base64 packs every 3 bytes of data into 4 characters.

Developers hit Base64 constantly. HTTP Basic Authentication headers are Base64-encoded 'user:password' strings. Small images get embedded in CSS and HTML as Base64 data URIs to save a network request. API payloads and JWT tokens carry Base64 segments. When you need one of these encoded quickly, opening a terminal or writing a script is overkill.

It's also the standard way to smuggle structured text through systems that would otherwise break it — putting a JSON blob into a single environment variable, an XML fragment into a query parameter, or binary-ish content into a YAML file.

One thing Base64 is not: encryption. It's a reversible public encoding with no key — anyone can decode it. Never treat Base64 as a way to protect secrets.

1. Type or paste your plain text into the input box.

2. The Base64 result appears instantly in the output box.

3. Copy the encoded string to your clipboard.

4. To reverse the process later, paste the string into our Base64 Decoder.

Input:

Hello World!

Output:

SGVsbG8gV29ybGQh