Does it support Chinese and Emoji?

Yes, it does. This tool first encodes with UTF-8 before Base64, so Chinese, Japanese, Emoji, etc., are correctly encoded and decoded without garbled text.

What is the URL-safe variant?

Standard Base64 contains +, /, = characters, which need escaping in URLs. The URL-safe variant replaces + and / with - and _ and removes padding, making it safe to use directly in URLs or filenames.

Base64 Encode/Decode

100% local processing

Plain Text

URL-safe variant (- _ instead of + /, no padding)

FAQ

Yes, it is safe. All encoding and decoding are done locally in your browser, and the text is never uploaded to any server.

What is Base64 Encoding/Decoding?

Base64 is an encoding method that represents binary data using 64 printable characters. It is often used to transmit data in text-only scenarios, such as embedding images in JSON, emails, or Data URLs, or carrying parameters in URLs. Encoding is not encryption; it just converts data into a safe, transmissible text form.

This tool supports bidirectional conversion between text and Base64, fully compatible with multibyte characters such as Chinese, Japanese, and Emoji, and provides a URL-safe variant (using - _ instead of + /, removing padding). All encoding and decoding are done locally in the browser, and the content is not uploaded.

How to Perform Base64 Encoding/Decoding

1Select the 'Encode' or 'Decode' mode.
2Paste the original text or Base64 string in the input box.
3If needed for URLs or filenames, check the URL-safe variant.
4Results are generated in real-time, and can be used with one click to copy.

Why Choose Our Base64 Tool

Privacy first: Encoding and decoding are done locally in the browser; text is not uploaded to servers.

Multi-language compatibility: UTF-8 handling ensures that Chinese and Emoji do not display incorrectly.

Supports URL-safe: Generate a variant that can be safely placed in URLs with one click.