Sentence Checker review
A broad free checker for everyday English corrections, tone, and sentence structure.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Sentence Checker is a web-based writing tool for students, teachers, journalists, authors, researchers, lawyers, and other writers. It accepts pasted text, highlights potential issues, and provides correction suggestions across grammar, spelling, punctuation, sentence structure, word choice, and parts of speech. The tool also covers fragments, run-on sentences, passive voice, plagiarism, and tone. Its free plan makes it suitable for people who want basic English correction without committing to a paid tier, while the Chrome extension extends checking to online documents.
The published plans show a Free tier with grammar checking, spelling and punctuation checking, and unlimited checks stated on the site. A Premium tier adds advanced features and capabilities, but the plan description does not break those additions into a detailed feature list. For buyers comparing paid writing tools, the free plan is the clearest fit when core correction is the priority. Premium may suit users who want broader capabilities, but its value depends on which advanced functions matter to their workflow.
Sentence Checker’s main strength is breadth within basic writing correction: it combines mechanical checks with sentence structure, word choice, passive-voice, plagiarism, and tone detection. Its AI features may support these correction and analysis functions, while multiple English variants are also described. The product is a practical choice for web-based writing and document review, especially when tone feedback and a browser extension are useful. Writers needing a narrowly defined workflow beyond the web and Chrome, or a more fully detailed paid offering, should compare alternatives before choosing it.
Sentence Checker pros and cons
- Where it wins
- Free plan includes grammar, spelling, and punctuation checks
- Checks sentence structure, word choice, passive voice, and tone
- Chrome extension supports checking in online documents
- Where it doesn't
- Premium adds advanced capabilities without detailed feature breakdown
- Platform coverage is centered on web and Chrome
- Plagiarism checking is included without further scope details
Sentence Checker fact sheet, pricing and score →
Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.
Last updated · How we research and update