All Tools VerseValidate ASCII Online
Check whether your text is valid 7-bit ASCII and flag any character that falls outside the range. Free, private, and works entirely in your browser.
- Runs in your browser
- Nothing uploaded
- Free, no sign-up
Check whether text is pure ASCII. Paste your text and the tool confirms it is all ASCII, or lists each non-ASCII character with its position and Unicode code point. Useful for finding hidden or accented characters. Runs in your browser.
How to Use Validate ASCII Online
- Paste your text. Drop in the text you want to check.
- Validate. Select the button to scan every character.
- Read the result. See whether the text is pure ASCII, and which characters are not.
- Fix if needed. Replace any flagged characters and check again.
Frequently Asked Questions
What counts as valid ASCII?
Standard ASCII covers the 128 code points from 0 to 127, which includes English letters, digits, and common punctuation.
Why would text fail?
Accented letters, emoji, smart quotes, and many symbols are outside ASCII and need a wider encoding such as UTF-8.
What does the report show?
It tells you if the text is valid ASCII and points out any characters that fall outside the range.
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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