Does it support Unicode / emoji?

Yes. Text is encoded as UTF-8 before Base64, so any Unicode character works correctly.

No. Encoding runs entirely on your device — nothing is sent to a server.

How do I decode Base64?

Use the companion Base64 Decode tool to convert Base64 back to text.

Encode any text to Base64 with full UTF-8 support. Runs entirely in your browser — no uploads, no sign-up.

Encode text to Base64 in your browser, the standard way to embed binary-safe data in URLs, JSON, data URIs and HTTP headers.