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Grammar checker with multi-tone preview, style guides, and 30+ languages.
An AI grammar checker reads your text and flags problems with spelling, grammar, punctuation, style, and clarity. The good ones explain why a fix matters so you write better next time. The great ones do it in any language, at any reading level, for any audience, without storing your text.
This one was built to do what the giants do not: unlimited words per check, custom style guide upload, multi-tone preview, in-browser private mode, and 30+ languages on the free tier. Privacy first. No surprise charges. One-click cancel.
Drop in a sentence, paragraph, or full document. No word limit on the free tier.
Spelling, grammar, style, clarity, inclusivity, AI-detection. Pick a target tone or reading level.
Inline suggestions with explanations. Accept all or pick one by one. Multi-tone preview shows 5 variants at once.
Spelling, grammar, punctuation, style, clarity, conciseness, passive voice, weak verbs, and repetition.
See the same paragraph rewritten in 5 tones (formal, casual, academic, persuasive, executive) in one view.
Rewrite for CEFR B1, 8th grade, executive summary, or non-native reader. Hit your audience precisely.
Flags gendered, ableist, or culturally biased language. Explains why so you learn for next time.
Drop a PDF of your AP, Chicago, or company style guide. The checker enforces every rule.
Premium runs the check in WebAssembly. Your text never leaves your device. Built for journalists, lawyers, and doctors.
Spanish, French, German, Portuguese, Italian, Dutch, Russian, Polish, Korean, Hindi, and more. English variants supported.
Live AI-detection score on every sentence. Find passages that read too smooth or formulaic.
Most checkers cap free at 500 to 1,000 words. We give you unlimited per check, 5 checks per day.
Every suggestion includes a one-sentence reason. You become a better writer just by using the tool.
Free tier deletes your text immediately. Premium runs entirely in your browser. We never train on your work.
One price, one click to cancel, email reminder before every renewal. No surprise charges, ever.
Polish essays before submission. Match your professor's preferred reading level. Export with track changes for revision.
Tighten prose, vary rhythm, catch repetition across long pieces. Style guide upload keeps brand voice consistent.
Polish emails, reports, and proposals. Pick executive summary tone to hit your audience cleanly.
Native-sounding English without losing your meaning. Reading-level targeting matches your audience.
Citation-aware checking. Custom style guide for APA, MLA, Chicago. Multi-language support for European and Asian academics.
In-browser ghost mode means client text never leaves your device. Compliance-friendly for HIPAA and legal privilege.
How this checker stacks up against Grammarly, ProWritingAid, and LanguageTool.
| Feature | Molixa | Grammarly | ProWritingAid | LanguageTool |
|---|---|---|---|---|
| Free word limit | Unlimited | Hidden caps | 500/check | 10,000 chars |
| Languages | 30+ | 23 | 1 (6 dialects) | 30+ |
| Multi-tone preview | 5 tones at once | One at a time | No | No |
| Reading level targeting | Yes | Goal setting | Reports | No |
| Custom style guide | Yes (PDF upload) | Enterprise only | No | Premium |
| Inclusivity scanner | Yes (with reasoning) | Flags only | No | No |
| In-browser private mode | Premium | No (cloud only) | No | Self-host |
| Pricing transparency | One price, one-click cancel | Trial trap complaints | Lifetime deal | Clean |
First pass runs a fast rule-based engine for spelling, grammar, and punctuation (the deterministic stuff). Second pass runs an AI model for style, clarity, tone, and inclusivity (the judgment calls). Both passes run together and merge into a single review.
Premium ships with a quantized language model running in WebAssembly. Your text never leaves your device. Slightly slower than cloud (1 to 2 seconds for a paragraph) but completely private. Lawyers and journalists need this.
Every fix has a confidence score. High-confidence suggestions get shown by default. Low-confidence ones go in an Optional tab so you are not overwhelmed by uncertain calls. Reduces the false-positive frustration that kills grammar checkers.
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The AI Grammar Checker page is built, reviewed, and maintained by the Molixa team. We use the tool we ship and update the docs when the behavior changes.