Base64 Encoder & Decoder

What is Base64?

Base64 is a way of representing binary data (images, files, audio) as plain ASCII text. It uses 64 characters — A–Z, a–z, 0–9, +, /, and = for padding. Because the result is text, base64 data can travel safely through systems that only handle text, like JSON payloads, HTML, email, and URLs.

When do developers actually use it?

• Embedding images in HTML or CSS — a small logo as a data:image/png;base64,… URL avoids an extra request.
• API payloads — sending binary files as a text field in a JSON request.
• Debugging — inspecting the base64 blobs you see in network logs and database dumps.
• Storing binary in text columns — when your storage layer can't handle raw bytes.

Why our tool instead of a command line?

You could run echo -n hello | base64 in a terminal. But when the data is a screenshot, a config file, or text with Chinese characters, pasting it here is faster — and this version is UTF-8 safe, so it handles emoji and CJK text correctly (many simple converters corrupt those).

Privacy first

Everything runs in your browser. Your images and files never leave your device — no server, no upload, no logs. That's the whole point.