Does this handle Unicode?

Yes. Input is UTF-8-encoded before Base64 encoding, so emoji and non-ASCII characters round-trip cleanly.

Is the output URL-safe?

No — it uses standard Base64 (with `+`, `/`, `=`). For URL-safe Base64, replace `+` → `-` and `/` → `_`.

What about binary files?

This tool handles text. For binary files, use your OS: `base64 < file.bin` on macOS/Linux.

Base64 encode

Encode any UTF-8 text as Base64 in your browser. Safe for tokens, IDs, and internal payloads.

Runs in your browser Instant No signup, no tracking

Text

Base64

About this tool

Encode UTF-8 text into Base64 — the encoding used for HTTP Basic auth headers, data URIs, JWT payloads, and lots of internal APIs. Unlike `btoa()` alone, this tool safely handles multi-byte characters (emoji, accented letters, CJK) by UTF-8-encoding first. Runs entirely in your browser.

Example

Paste the input on the left and you will get output like this:

Sample Text

Hello, world! 👋

Resulting Base64

SGVsbG8sIHdvcmxkISDwn5GL

How to use Base64 encode

Paste or type your Text into the left pane.
The Base64 appears instantly in the right pane. Conversion runs in your browser — nothing is uploaded.
Copy the result to your clipboard or download it as a file.

FAQ

Does this handle Unicode?: Yes. Input is UTF-8-encoded before Base64 encoding, so emoji and non-ASCII characters round-trip cleanly.
Is the output URL-safe?: No — it uses standard Base64 (with `+`, `/`, `=`). For URL-safe Base64, replace `+` → `-` and `/` → `_`.
What about binary files?: This tool handles text. For binary files, use your OS: `base64 < file.bin` on macOS/Linux.