Writing Correction Tool Reviews
How much text can you actually check for free?
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The Short Answer
- QuillBot — QuillBot's grammar checker page says "Run unlimited grammar checks at no cost" with "no sign up or payment required", and reserves advanced recommendations for Premium.
- ProWritingAid — ProWritingAid publishes its free cap as a "500 word count limit" and repeats it in the FAQ: free accounts "only receive suggestions for 500 words at a time".
- LanguageTool — LanguageTool caps free checks at a "Character limit per text field" of "2,000" against Premium's 150,000, and renders its prices client-side so no USD figure could be read.
- Grammarly — Grammarly's help centre states that "Users of Grammarly Free have a limited number of suggestions per day" — a cap that appears nowhere on the pricing page and is never given as a figure.
| Product | Best for | From | Free plan | Free-plan limit |
|---|---|---|---|---|
| QuillBot | Unlimited checks, basic suggestions | $8.33/mo (annual) | Yes | Corrects, capped |
| ProWritingAid | 500 words at a time, stated twice | $10/mo (annual) | Yes | Corrects, capped |
| LanguageTool | 2,000 characters, and no readable price | — | Yes | Corrects, capped |
| Grammarly | A cap with no number, in the help centre | $12/mo (annual) | Yes | Corrects, capped |
What we checked, and what we did not test
A writing tool’s free tier is not limited the way a video tool’s is. There is no watermark and no export button — the restriction is quieter. It is either a length you cannot exceed, or a class of suggestion you can see the existence of and not the content of. Both decide whether the free tier is a tool or a demo, and neither shows up in a feature list as anything more than the word “basic”.
So we opened four pricing pages on 6 August 2026 and looked for a number: words, characters, or uses per day. Each verdict quotes what we found. We did not paste text into any of them.
Three of the four publish a number, and they are wildly different numbers — 500 words at a time, 2,000 characters per field, or unlimited checks with no account at all. The fourth is the most used product of the four, and what it publishes is the existence of a limit without its size: “Users of Grammarly Free have a limited number of suggestions per day.” Not on the pricing page — in a help-centre article about a different feature.
Unlimited checks, basic suggestions
1. QuillBot — Unlimited checks, basic suggestions
QuillBot draws its line across suggestion depth instead of text length, which is the only such line in this group.
Best for Unlimited free grammar checks without an account
From $8.33/mo (annual). Free plan: Free — "Paraphrase up to 125 words", 2 paraphrase modes, "Fix basic grammar errors", humanising up to 125 words at 6 uses a day, and plagiarism checking capped at "25,000 words/month".
- Premium — $8.33/mo billed annually · 1 seat ("$8.33 USD Per month, billed annually" is the only price the page shows — no monthly-billed figure appears)
- Team — price not shown on the page we opened (No price shown; the page offers only "Explore Team Plan")
QuillBot's grammar-checker page is unusually direct: "Our AI Grammar Checker is completely free to use. There is no sign up or payment required" and "100% free: Run unlimited grammar checks at no cost." The pricing page draws the line elsewhere — free is "Fix basic grammar errors" while Premium adds "Get advanced grammar recommendations" — so the cap is on suggestion depth rather than on length.
Pros
- Unlimited free grammar checks with no sign-up, stated in those words on the vendor's own page.
- The free tier applies real corrected text rather than counting issues behind a paywall.
Skip it if
- Free grammar help is explicitly "basic"; advanced recommendations require Premium.
- Paraphrasing on free is capped at 125 words at a time.
- Only the annualised $8.33 figure is published — there is no monthly-billed price to compare it against.
500 words at a time, stated twice
2. ProWritingAid — 500 words at a time, stated twice
ProWritingAid publishes the smallest free allowance here and is the clearest about it.
Best for The only free cap published as an exact number
From $10/mo (annual). Free plan: Free — a "500 word count limit", "2 runs per report per day", "10 Rephrases per day" and "3 Sparks per day".
- Premium — $30/mo, or $10/mo billed annually · 1 seat ($120 total when billed yearly; the page claims "Save 67% compared to monthly")
- Premium Pro — $36/mo, or $12/mo billed annually · 1 seat ($144 total when billed yearly)
- Lifetime Premium — price not shown on the page we opened · 1 seat ($399.00 one-time payment rather than a subscription)
- Lifetime Premium Pro — price not shown on the page we opened · 1 seat ($699.00 one-time payment rather than a subscription)
The free tier's cap is printed as "500 word count limit", and the FAQ repeats it without ambiguity: "With a free account, you will only receive suggestions for 500 words at a time. With a Premium or Premium Pro license, you can use ProWritingAid with documents of any length." Free users see and can apply the actual suggestions — in 500-word slices.
Pros
- The free limit is an exact number stated twice — on the plan card and in the FAQ.
- Every paid tier, including two lifetime options, carries an exact USD price.
- Free users get real grammar, spelling and punctuation suggestions rather than a teaser count.
Skip it if
- 500 words at a time makes long documents a chore of slicing and re-pasting.
- Reports are capped at "2 runs per report per day" and several report types are excluded entirely from free.
- AI rewriting is limited to "10 Rephrases per day" and "3 Sparks per day".
2,000 characters, and no readable price
3. LanguageTool — 2,000 characters, and no readable price
LanguageTool publishes its free cap precisely and its price not at all.
Best for A published character cap, and no published price
From —. Free plan: Basic — a "Character limit per text field" of "2,000" against Premium's "150,000", and "Sentence rephrasing by A.I." limited to "3 per day".
- Premium — price not shown on the page we opened · 1 seat (Prices are injected client-side by Recurly and geo-detected; the page we fetched carried data-country="KR" and data-currency="KRW" with no USD figure in the HTML, and forcing ?country=US changed nothing)
- Teams — price not shown on the page we opened (Seat selector from 2 to 1000 users, with amounts loaded the same client-side way)
The comparison table gives the free Basic plan a "Character limit per text field" of "2,000" against Premium's "150,000", and caps "Sentence rephrasing by A.I." at "3 per day". Corrections themselves are applied rather than withheld — Premium adds "More than 20,000 additional checks" on top.
Pros
- The free cap is published as a number — 2,000 characters per text field.
- Free users get corrected text, not a locked preview.
- Multilingual checking is included at the free tier rather than reserved for Premium.
Skip it if
- 2,000 characters is roughly 300 words, which rules out long documents.
- No USD price could be read at all: the pricing page renders amounts client-side and geo-detected us as Korea.
- AI rephrasing is capped at three uses a day on free.
A cap with no number, in the help centre
4. Grammarly — A cap with no number, in the help centre
Grammarly inverts the pattern: the clearest prices on the page, and a free limit that exists, is admitted, and is never quantified.
Best for Clear prices, and a free limit stated only in the help centre
From $12/mo (annual). Free plan: Free — "Write without mistakes", "See your writing tone", and "Generate text with 100 AI prompts" against Pro's 2,000 a month; no word or character limit is stated anywhere on the page.
- Pro — $30/mo, or $12/mo billed annually · 1 seat ("$12 USD / member / month, billed annually" against "$30 when billed monthly", with a 7-day free trial)
- Enterprise — price not shown on the page we opened ("Contact Sales" with no number)
The pricing page never states a free cap, but the help centre does: "Users of Grammarly Free have a limited number of suggestions per day", with the advice that "If you're on the Free plan, consider upgrading to Pro to increase your usage limit." So free users do see and apply real corrections and the allowance is rationed daily — and the number itself is published nowhere we could find.
Pros
- Pro's price is published in both billing periods: $12 a month billed annually, $30 billed monthly.
- The free plan includes tone detection, which the other three here do not offer at all.
Skip it if
- The free plan is capped at "a limited number of suggestions per day" and the number is never published.
- That cap appears only in help-centre articles, not on the pricing page a buyer reads.
- Enterprise pricing is unpublished.
What this means if you are choosing today
For a quick check on an email or a paragraph, QuillBot is the only one of the four that needs no account and states no length cap on grammar checking. For a chapter or a report, all three published caps are too small to work in — 500 words and 2,000 characters are both “paste it in sections” territory — which is exactly what they are designed to be.
Grammarly’s unnumbered cap is worth reading as information rather than an oversight. Three competitors publish a figure for the same thing; the largest product in the category publishes the word “limited” and leaves it there, in a support article rather than on the page where people decide. That only becomes visible when someone lines the four pricing pages up next to each other and then goes looking for the number that is missing from one of them.
Frequently Asked Questions
What is the free word limit on ProWritingAid?
500 words, stated in two places. The plan card reads "500 word count limit" and the FAQ says "With a free account, you will only receive suggestions for 500 words at a time. With a Premium or Premium Pro license, you can use ProWritingAid with documents of any length." Free reports are additionally capped at two runs per report per day.
Is QuillBot's grammar checker really free?
For grammar checking, its own page says so directly: "Our AI Grammar Checker is completely free to use. There is no sign up or payment required" and "100% free: Run unlimited grammar checks at no cost." The paywall sits on depth rather than length — free is "Fix basic grammar errors", Premium adds "advanced grammar recommendations" — and paraphrasing is separately capped at 125 words.
How long a text can LanguageTool check for free?
2,000 characters per text field, which is roughly 300 words. The comparison table puts that against 150,000 characters on Premium, and caps free AI sentence rephrasing at "3 per day". Corrections themselves are applied on the free tier rather than withheld behind a counter.
What is Grammarly's free limit?
A daily one, and Grammarly does not say how large. Its pricing page states no cap at all; its help centre does: "Users of Grammarly Free have a limited number of suggestions per day", adding that "If you're on the Free plan, consider upgrading to Pro to increase your usage limit." This page first recorded Grammarly as unconfirmed on the strength of the pricing page alone, which was one page short.
Did you paste text into each of these?
No. Every verdict here was read on the vendor's own pricing page or product page on 6 August 2026 and is labelled as read, not run. Grammarly's blank is the clearest case for a hands-on test on this whole site: pasting 5,000 words into a free account and seeing what happens would settle in one minute what the pricing page does not say at all.
How We Keep This Updated
Prices move and vendors rewrite their plan tables, so every value on this page carries the date we read it. When a page changes, the change lands here rather than being edited away quietly. The procedure is on the methodology page. tell us and we will re-check it.
- 2026-08-06 — Corrected. Grammarly was first recorded as unconfirmed because its pricing page states no free cap. Its help centre states that free users have "a limited number of suggestions per day", so the verdict is now a stated condition — with the number still unpublished anywhere we could find.
- 2026-08-06 — First published. Free-tier caps read on each vendor's own pricing or product page; LanguageTool prices recorded as unavailable because the page renders them client-side and geo-detected us as Korea.