All Tools VerseValidate UTF-8 Online
Check whether your text is valid UTF-8 and get a clear report of any issues found. Free, private, and works entirely in your browser.
- Runs in your browser
- Nothing uploaded
- Free, no sign-up
Check text for valid UTF-8 and see useful stats. Paste text to confirm it has no broken (unpaired surrogate) characters, and view the code point count, UTF-8 byte length, and whether it is pure ASCII. Runs in your browser.
How to Use Validate UTF-8 Online
- Paste your text. Drop in the text you want to check.
- Validate. Select the button to scan it as UTF-8.
- Read the result. See whether the text is valid UTF-8 and any details.
- Fix if needed. Correct any problem and check again.
Frequently Asked Questions
What does the validator check?
It confirms the text is well formed UTF-8, meaning every character is encoded correctly with no broken sequences.
When would text be invalid?
Usually when bytes from a different encoding are mixed in, or when a multi byte character was cut in the middle.
Why does UTF-8 matter?
It is the standard for web text. Valid UTF-8 means your content displays correctly across browsers and devices.
Is my data sent anywhere?
No. Everything runs in your browser, so what you enter is never uploaded.
Is it free?
Yes. Every tool here is free to use with no sign up.
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