UlvixorBasic Grammar Checker
Scans a text for common mechanical issues: consecutive repeated words, spaces before punctuation marks, missing spaces after a punctuation mark, repeated punctuation, and a short list of frequently confused word pairs. It's not an AI grammar engine: these are explicit rules that run in your browser, without sending your text to any server.
How it works
- Type or paste your text into the input panel.
- Choose the language: Spanish or English.
- Click 'Check text' to run the rules against the content.
- Each match is shown with the exact detected snippet and an explanation of what to review.
Use cases
- Catch words accidentally repeated while typing or pasting text quickly ('the the', 'que que').
- Find misplaced spaces around commas, periods, or exclamation marks.
- Check a text before publishing to catch duplicated punctuation from a typo.
- Get a reminder about common spelling confusions like 'its'/'it's' or 'your'/'you're'.
Use cases
- Catch words accidentally repeated while typing or pasting text quickly ('the the', 'que que').
- Find misplaced spaces around commas, periods, or exclamation marks.
- Check a text before publishing to catch duplicated punctuation from a typo.
- Get a reminder about common spelling confusions like 'its'/'it's' or 'your'/'you're'.
Common mistakes
- Expecting this tool to catch gender, number, or verb tense agreement errors.This tool uses mechanical rules (text patterns), not a language model that understands sentence meaning. Errors like subject-verb disagreement aren't detected here.
- Treating the flagged 'common confusions' as definite errors that always need fixing.Words like 'its' or 'their' are perfectly correct in many contexts; the tool only flags them so you can manually check whether that form or the alternative fits, not to change them automatically.
- Using this tool as a substitute for human review before an important publication.It's meant as a quick first pass for obvious mechanical errors. For formal or high-stakes texts (theses, articles, contracts), always complement it with human review or an AI-powered grammar tool.
Frequently asked questions
No. It uses a set of explicit rules (regular expressions) to detect specific mechanical patterns, not a trained language model.
Consecutive repeated words, spaces before commas or periods, missing spaces after punctuation, and repeated punctuation (like '??' or ',,'). These are mechanical patterns detected with certainty.
They're words often confused with a similar form (for example 'its' with 'it's'). The tool flags them as a suggestion to check the context, not as a confirmed error, since telling them apart requires understanding the sentence's meaning.
No. All rules run locally in your browser with JavaScript. Your text never leaves your device.
Alternatives
Tools like Grammarly or LanguageTool use trained language models to catch far more sophisticated grammar and style issues, but require sending your text to an external server. This tool prioritizes privacy (nothing leaves your browser) in exchange for a more limited scope.