The mistakes that actually matter
Not all grammar errors are equal. Readers forgive an unusual sentence structure if the meaning is clear. They do not forgive errors that look careless or change meaning. The highest-impact mistakes are:
- Homophone confusion: its/it's, your/you're, their/there/they're, then/than, affect/effect.
- Repeated words: "the the" or "and and" slip past spellcheck but look sloppy.
- Double spaces: Tiny, but they signal lack of polish.
- Sentence-case errors: Starting a sentence with a lowercase letter breaks flow.
- AI-sounding phrasing: Phrases like "delve into," "leverage," and "seamless" are not grammar errors, but they erode trust if overused.
Why over-checking hurts
Advanced grammar tools love to suggest changes that make writing more formal but less human. They flatten voice, kill rhythm, and turn a conversational blog post into a legal brief. The best editing workflow is: catch the obvious errors first, then protect the voice.
How the Glint Grammar Checker works
Glint AI's Grammar Checker runs a fast local ruleset over your text. It highlights homophone risks, repeated words, double spaces, lowercase sentence starts, and common AI-sounding phrases. For deeper correction, it also builds a one-click ChatGPT prompt tuned to your draft.
Free checker vs. paid editor
| Need | Use this |
|---|---|
| Fast sanity check before publishing | Free grammar checker |
| Long-form book or white paper | Human editor |
| Academic or legal document | Subject expert + proofreader |
| Tone and readability tuning | Checker + reading ease tool |
Pair with readability
Grammar fixes the mistakes; readability fixes the experience. After you clean up the errors, run the draft through the reading ease guide to make sure the sentences flow. A grammatically perfect paragraph can still be exhausting to read.