Verdict up front: IELTSOnlineTests is the volume king of free IELTS practice - over 100 free mock tests in a realistic computer-based interface, at no cost. What the free model cannot fund is depth: feedback stops at answer keys and band scores, with no analysis of why you keep losing the same marks.
Full disclosure: IELTSbiz is our own platform and appears as the recommended companion at the end. IOT is described strengths-first, and for what it gives away free, it deserves the praise.
What is IELTSOnlineTests?
IELTSOnlineTests - usually shortened to IOT - is one of the largest free IELTS practice websites, operated by the InterGreat Education Group. Its core offer is simple and generous: a library of over 100 up-to-date IELTS mock tests, free to sit online, with instant scoring for the objective sections and a band calculator alongside.
The platform funds itself through advertising and adjacent services rather than paywalls, which is why the headline promise - the tests are always free - has held for years.
Who is IOT for?
Any candidate who needs practice volume without spending money. Students sitting weekly timed mocks for months, candidates in countries where paid platforms are unaffordable, and anyone taking computer-delivered IELTS who wants interface familiarity - IOT serves all of them at zero cost.
It fits less well as your only tool if you are stuck at a plateau. When three consecutive mocks return Band 6.5, the question becomes which questions and why - and an answer key cannot answer it.
IELTSOnlineTests features
The free mock test library
The headline feature: 100+ full mock tests for Listening and Reading, refreshed with recent-format material, sat under real timing in the browser. For raw practice volume at zero cost, nothing mainstream beats it.
Computer-based test interface
IOT's test player closely mirrors the official computer-delivered IELTS experience - highlighting, navigation, timing. For candidates booked onto computer-based IELTS, that familiarity is genuinely valuable rehearsal and costs nothing. Our guide to computer-based vs paper-based IELTS covers why interface practice matters.
Instant scores and band calculator
Objective sections are scored instantly, with a band conversion on the spot. Answer keys let you review what the correct answers were; locations and explanations of varying depth accompany many tests.
Community
A large global user community means shared discussion around tests and questions - the site reports a user base in the tens of millions across more than a hundred countries. Peer discussion is not examiner feedback, but seeing how others reasoned through a question has real value.
IELTSOnlineTests pricing (as of 2026)
| Tier | Price (as of 2026) | What you get |
|---|---|---|
| Free | $0 | 100+ mock tests, instant scoring, band calculator, ad-supported |
| Premium/VIP options | Low-cost upgrades, offer-dependent | Ad removal and extras where offered |
The free tier is the product; paid extras have varied over time and by region, so treat anything beyond "the tests are free" as check-the-site territory.
IELTSOnlineTests pros and cons
Pros
- Enormous free mock test library - 100+ tests at no cost
- Realistic computer-based test interface
- Instant scoring with band conversion
- Up-to-date, recent-format material
- Active global community around the tests
Cons
- Ad-heavy free experience and a busy interface
- Feedback stops at answer keys - no analysis of why you missed what you missed
- No per-question-type tracking across your test history
- Writing and Speaking are not meaningfully assessed free
Verdict: 8/10
IOT earns an 8/10 for doing one thing at a scale nobody matches: free, realistic, timed practice volume. As the rehearsal half of a preparation, it is close to unbeatable value, because the value is infinite per dollar.
The missing points are the measurement half. A mock test tells you your score; it does not tell you that four of your seven Reading losses were True/False/Not Given paraphrase traps. Candidates who sit ten IOT mocks and plateau are usually missing exactly that layer - diagnosis, not more volume.
The best alternative: IELTSbiz
Strictly a companion as much as an alternative: IELTSbiz supplies the analysis layer that free volume cannot fund. Full disclosure again: IELTSbiz is our own platform - the free tier is the honest way to check the claims.
Every IELTSbiz practice session generates a Cambridge-style passage by question type and returns trap-level feedback on every wrong answer - which distractor pattern caught you and how to spot it next time. Sessions accumulate into a per-question-type band estimate, so the "which questions and why" that a mock cannot answer becomes your dashboard.
Writing - which free mock sites cannot assess - is covered by the AI Writing Checker, scoring all four official criteria per essay. The accuracy is measured: IELTSbiz's study of 1,200 essays found AI band scores matched human examiners within ±0.5 bands in 94.2% of cases.
Free to start with no card; Pro is $6.99/month or $29 lifetime (pricing).
IELTSOnlineTests vs IELTSbiz at a glance
| IELTSOnlineTests | IELTSbiz | |
|---|---|---|
| Price | Free, ad-supported (as of 2026) | Free to start; $6.99/month or $29 lifetime |
| Writing feedback | Not meaningfully assessed free | AI checker, all four criteria, every essay |
| Reading practice | 100+ static mock tests, answer keys | Unlimited generated passages with trap-level feedback |
| Band tracking | Score per mock test | Estimated band per question type over time |
| Free tier | Everything, with ads | Free daily practice and writing checks, no card |
The strongest zero-to-low-budget setup in IELTS prep is arguably these two together: IOT for weekly full timed mocks, IELTSbiz for daily diagnostic practice and essay checks between them.
Our IELTSOnlineTests alternative page details the pairing, the best IOT alternatives roundup covers the wider field, and the best free IELTS practice websites guide ranks everything free side by side.