Base64 Encoder / Decoder

Does this Base64 tool send my text to any server?

No. All Base64 encoding and decoding happens entirely inside your browser tab using JavaScript. Your text, encoded output, and decoding operations never leave your device, ensuring complete privacy.

Is this tool safe for UTF-8 text, emojis, and non-English characters?

Yes. This tool uses a safe UTF-8 compatible Base64 implementation, meaning emojis, multilingual text, special characters, and symbols are all correctly encoded and decoded without corruption or data loss.

What does the line wrapping option (64 or 76 characters) do?

Line wrapping breaks the Base64 output into fixed-length lines, which is required by some email systems, MIME encoders, and older protocols.

Why is there an option to strip whitespace before decoding?

Some Base64 text gets broken across multiple lines or contains tabs/spaces. Stripping whitespace ensures clean decoding and prevents errors with malformed Base64 blocks.

Can this tool decode large binary Base64 data such as files?

This tool is designed for text payloads. For large binary Base64 (PDFs, images, ZIPs), use your dedicated 'File ↔ Base64' converter instead.

What happens when I use the Swap Input/Output button?

The swap button switches between Encode and Decode mode and automatically moves your previous output into the new input field.

Why does decoding sometimes fail?

Common causes include missing padding, hidden whitespace, or incomplete Base64 blocks. Enabling whitespace stripping usually resolves the issue.