UTF8 Encoder
cross-browser testing tools
World's simplest online UTF8 encoder for web developers and programmers. Just paste your text in the form below, press the UTF8 Encode button, and you'll get UTF8-encoded data. Press a button – get UTF8. No ads, nonsense, or garbage. Works with ASCII and Unicode strings.
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Want to UTF8 decode text?
Use the UTF8 decoder tool!
Using a UTF8 Encoder in Cross-browser Testing
A UTF8 encoder can be useful if you're doing cross-browser testing. For example, you can use it to craft data for testing input forms or for checking data sanity. If the input form has weak UTF8 validation, then you may be able to bypass various security checks. Similarly, you can use an UTF8 encoder to find out what bytes are present in the input data. For example, text can have homoglyphs that look like regular characters but are actually similar-looking Unicode characters. By encoding your data, you'll be able to tell what bytes each characters is made out of. Additionally, you may use an UTF8 encoder to check how many bytes the input takes. If a browser checks data length, then by using weird Unicode characters, you can feed it more bytes than it expects that can lead to issues in your application.
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Pro tip: You can use ?input=text query argument to pass text to tools.
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