What is Base64 encoding?

Base64 encodes binary data as ASCII text using 64 characters. It’s commonly used to embed images, files, or credentials in text formats.

Is the encoding/decoding done locally?

Yes. Everything runs in your browser—no data is uploaded or stored on any server.

This tool uses UTF‑8 for text input/output and the standard Base64 alphabet.

Yes. The decoder ignores whitespace and line breaks automatically.

Convert text to Base64 and back—fast, free, and private. All processing happens locally in your browser.

Fast, private, in‑browser Base64 conversions with UTF‑8 support.

We use the browser’s built‑in btoa/atob methods with UTF‑8 handling to encode and decode text locally—your data never leaves your device.

Paste Base64 with line breaks—whitespace is ignored. Use Swap to quickly flip input/output, and Copy to grab results.