7 Best IELTS Writing Checker Tools (2026)

An IELTS writing checker is only useful if it answers the two questions a real examiner would: what band is this essay, and exactly why. Plenty of tools will underline a missing article. Far fewer can tell you that your Task Response is capping the whole essay at Band 6.

Short answer: the best IELTS writing checker in 2026 is the IELTSbiz Writing Checker, because it grades against all four official band criteria and its engine matched certified human examiners within ±0.5 bands in 94.2% of a 1,200-essay study - and the criterion-level report is free to start.

Full disclosure before we go further: IELTSbiz is our own platform, so weigh that as you read. To keep the ranking honest, every competitor below is described strengths-first, with a genuine "best for" verdict, and the drawbacks we list for our own tool are real ones.

Here is the whole field at a glance, with prices as of 2026. Shortlist two, then read the detailed notes for the trade-offs behind each entry.

How we ranked these writing checkers

We judged every tool on four things, in this order. First, feedback depth: does it explain errors against the official criteria, or just mark them? A band number without reasons changes nothing about your next essay.

Second, measurement: can you see your estimated band per criterion, and can you track it across essays over time? Improvement you cannot see is improvement you cannot steer.

Third, free access: how much genuine value do you get before paying, and is a card required? Fourth, price: what does the paid tier cost against what it unlocks. Accuracy evidence broke any ties - a checker that publishes alignment data against human examiners earns more trust than one that does not.

1. IELTSbiz Writing Checker - Best overall for band-accurate, criterion-level feedback

The IELTSbiz Writing Checker grades your essay the way an examiner does: separately against Task Response (whether you fully answered the question), Coherence and Cohesion, Lexical Resource and Grammatical Range and Accuracy - the four official criteria that each contribute 25% of your Writing band.

You get a band estimate per criterion, an overall band, and specific, sentence-level notes on what is holding each criterion down.

The accuracy claim is measured, not asserted. IELTSbiz's study of 1,200 essays found AI band scores matched human examiners within ±0.5 bands in 94.2% of cases, with an exact band match in 78.3% of essays. That is the difference between a number you can plan around and a number you have to second-guess.

It also sits inside a wider measurement toolkit: reading practice with trap-level feedback, a daily Word Coach for vocabulary, and a free Band Score Calculator.

The free tier includes monthly essay checks with the full criterion report and needs no card; the paid tier is $6.99/month or a one-off $29 lifetime plan, which is unusually cheap for unlimited scored feedback - see the pricing page.

The fair drawbacks: it checks typed essays, so handwriting practice still needs a human eye, and it does not offer live one-to-one teaching. If you want a teacher's commentary in the margins, pair it with a human marking service below.

For the core job - a trustworthy band estimate with reasons, essay after essay - it is the strongest tool here.

2. Engnovate - Best free band estimates with a community

Engnovate has built a real following by making automated essay scoring free at the point of use.

You paste an essay, get a band estimate quickly, and can browse a large community library of other candidates' essays and scores, which is genuinely useful for calibrating what a Band 6.5 versus a Band 7.5 answer actually looks like.

The strengths are speed, zero cost for the basics, and that community corpus. For a candidate who wants a rough number on every practice essay without spending anything, it does the job, and the volume of shared essays is something no other tool on this list matches.

The trade-offs: the free estimates are lighter on criterion-by-criterion reasoning than a full examiner-style report, daily limits apply, and no published study backs the scores' alignment with human examiners. Best for high-volume free checking where a directional number is enough. Our Engnovate alternative page compares the two approaches directly.

3. Writing9 - Best for highlighted, sentence-by-sentence corrections

Writing9 is a dedicated IELTS essay checker whose signature feature is visual: it highlights problem phrases directly in your text and attaches a correction or suggestion to each one, alongside band estimates for the four criteria. Seeing your own sentences marked up is motivating and concrete in a way a summary report is not.

It also stores your checked essays, so you can scroll back through your history, and the interface is clean and fast. For candidates who learn best by seeing exactly which phrase cost them and what to write instead, it is a strong choice.

The honest limits: the useful volume sits behind a subscription (roughly $10-15/month as of 2026, depending on the plan), the free tier is a thin taster, and the band estimates - like most tools here - come without published accuracy data. Best for visual learners who will pay for a correction-first workflow.

4. Cathoven - Best for linguistic depth and CEFR profiling

Cathoven comes at essay analysis from a computational-linguistics angle. Beyond an IELTS-style score, it profiles your text's CEFR level (the A1-C2 European language scale), vocabulary sophistication, sentence complexity and readability - the kind of analysis language teachers use to diagnose a learner's actual level.

That makes it uniquely good at answering "is my vocabulary genuinely Band 7, or am I repeating B1 words?" Its lexical profiling is more granular than any other tool on this list, and teachers preparing IELTS students get a lot of diagnostic value from it.

The trade-offs: it is a language-analysis suite first and an IELTS checker second, so feedback is framed in linguistic metrics more than band-descriptor language, and the credit-based pricing suits occasional deep dives more than daily essay grinding.

Best for data-minded candidates and teachers who want to see under the hood. See our Cathoven alternative comparison for how the two pair.

5. TestGlider - Best for writing scored inside full mock tests

TestGlider's angle is context: rather than checking isolated essays, it scores your writing as part of full-length AI mock tests, so your Task 1 and Task 2 happen under real timing, after a Reading and Listening section, exactly as they will on test day. The AI feedback arrives quickly with band estimates and improvement notes.

That exam-conditions realism is its genuine strength. Writing a decent essay fresh is one skill; writing one in the final hour of a full sitting is another, and TestGlider trains the second.

The limits: essay feedback is one component of a broader mock-test product, so the criterion-level depth is thinner than a dedicated checker, and the free tier is a trial rather than an ongoing allowance. Best for candidates in the final month who need full-test stamina with a scored Writing section included.

6. E2 Language assessments - Best for human teacher marking

E2 Language includes human writing assessments in its paid IELTS courses: you submit an essay and a real teacher returns a mark with written comments.

The value is judgment - a human can notice that your argument contradicts itself in paragraph three, or that your tone is wrong for a formal letter, in ways automated tools still handle unevenly.

The teaching around the assessments is strong too: method videos, live classes and structured courses mean the feedback lands inside a curriculum rather than in a vacuum.

The trade-offs are the classic human-marking ones: turnaround takes days rather than seconds, assessment credits are finite, and the course pricing is premium. Best used as an occasional calibration check - two or three human marks across your preparation - while an AI checker handles the essay-after-essay volume in between.

7. Grammarly - Best adjunct for surface grammar, not a band scorer

Let us be precise about what Grammarly is, because it is excellent at it: a general-purpose proofreader that catches grammar slips, spelling, punctuation and awkward phrasing across everything you write, with a generous free tier and premium plans from about $12/month as of 2026.

For polishing Grammatical Range and Accuracy at the surface level, it is best in class.

What it is not - and does not claim to be - is an IELTS tool.

It has no concept of Task Response, cannot judge whether you addressed both views in a discussion essay, and will happily polish a Band 5 answer into a grammatically clean Band 5 answer. It knows nothing about the band scale.

The right way to use it: draft, run your essay through an IELTS-specific checker for the band-level diagnosis, and let Grammarly sweep the surface errors it is built to catch. As an adjunct it earns its place; as your only checker it will quietly mislead you.

Best for candidates whose grammar slips are frequent enough to need a daily net.

What makes a checker genuinely IELTS-specific?

One test separates the field: does the tool report four separate criterion scores? IELTS Writing is marked on four descriptors of equal weight, and each fails for a different reason.

Task Response falls when you answer half the question; Coherence and Cohesion falls when your paragraphs do not build; Lexical Resource falls to repetition; Grammatical Range and Accuracy falls to error density or timid structures.

A single overall number hides which of those four is your problem, and the fixes have nothing in common. A candidate capped by Task Response needs to change how they plan, not how they conjugate. A candidate capped by cohesion needs paragraph logic, not vocabulary lists.

So when you evaluate any checker, ask three questions. Does it show a band per criterion? Does it quote your own sentences as evidence rather than issuing generic advice?

And does it tell you what to do differently on the next essay? Tools that pass all three are IELTS instruments; tools that pass none are proofreaders wearing an IELTS label.

Word count is a small but telling extra: Task 2 penalises essays under 250 words, and an IELTS-aware tool flags this before scoring. A general proofreader has no idea the threshold exists. Our guide to the 150/250 word rules explains why length sits upstream of every criterion.

What are the common mistakes when using a writing checker?

The first mistake is chasing the number instead of the reasons. Submitting the same essay to three tools and averaging the scores tells you nothing; reading one tool's criterion feedback carefully and rewriting tells you everything. The score is a thermometer, not a treatment.

The second is checking untimed essays. An essay written in ninety leisurely minutes is not the essay you will produce in forty under pressure, so its score flatters you. Always draft under exam timing, then check - the gap between your timed and untimed writing is itself useful data.

The third is fixing everything at once. Feedback listing twelve issues invites you to fix none of them. Pick the lowest criterion, ignore the rest, and let the next essay's scores confirm the fix landed before you move on.

The fourth is skipping the rewrite. A checked essay you never rewrote is a diagnosis you never treated. The single highest-value hour in Writing preparation is rewriting a scored essay with the feedback open beside it, then submitting the rewrite and watching the criterion move.

Can an AI writing checker really predict my IELTS band?

Within an honest margin, yes - if it is trained against the actual band descriptors and validated against human examiners. The IELTSbiz study cited above found ±0.5-band alignment in 94.2% of 1,200 essays, which is comparable to the variation between two human examiners marking the same script.

The caveat is that this holds for tools that grade all four criteria. A tool that only counts errors is measuring one criterion out of four and extrapolating. Treat any single estimate as a range, and trust the trend across five or six essays more than any individual number.

Should I pay for an IELTS writing checker or use free tools?

Start free, and pay only when you hit a real limit. The free tiers of IELTSbiz and Engnovate together cover a lot of checking at zero cost.

The moment paying makes sense is when Writing is your gap skill and you need scored feedback on essay after essay - at that point an unlimited plan costs less than a single hour of private tutoring.

Our wider guides to the best free IELTS practice websites and the best paid IELTS prep websites apply the same logic across every skill.

How should you actually use a writing checker week to week?

A workable loop: write one timed essay every two or three days, check it immediately, and fix one criterion at a time. If Task Response is your lowest score, your next essay's only goal is a plan that answers every part of the question - ignore the vocabulary notes until that number moves.

Recheck old prompts after two weeks. Rewriting an essay you already received feedback on, then comparing the two scores, is the fastest proof that the feedback is changing your writing rather than washing over you.

Finally, pair the checker with input: a checker diagnoses, but model answers teach. Our guide to the Band 7 essay structure and the Writing band descriptors decoded supply the "what good looks like" side of the loop. Then run your next essay through the Writing Checker and see which criterion moves first.