It is Sunday evening, and you are rewriting the same news article three times: once for your beginners, once for your intermediate group, and once for the two students who arrived last month speaking almost no English. Then come the vocabulary lists, the comprehension questions, and the speaking prompts. If you teach English learners, you know this double-prep problem better than anyone — and you probably pay for classroom materials out of your own pocket.
That is why I put together this guide to free AI tools for ESL teachers in 2026. ESL and ELL teachers do the work of two teachers: you teach content, and you build the language scaffolding that makes the content reachable. Most AI-tool roundups are written for general classroom teachers and ignore what language teachers actually need — text leveling, pronunciation practice, gap-fills, and materials that respect a learner’s first language.
Every tool below has a real free tier that a working teacher can live on, not a seven-day trial. For each one, I will tell you what the free plan actually includes, where the paywall starts, and the specific ESL job it does well. If you want a broader list beyond language teaching, we also keep a roundup of the best free AI tools for teachers updated on this site.
Quick Comparison Table
| Tool | Best For | Free Plan | Paid From | Rating |
|---|---|---|---|---|
| Twee | ESL-specific activities from any text or video | Yes, limited generations | ~$8/month (annual) | 9.3/10 |
| Diffit | Leveling any text for mixed-proficiency classes | Yes, core leveling free | ~$15/month | 9.1/10 |
| Brisk Teaching | Feedback and leveling inside Google Docs | Yes, generous | ~$10/month | 8.9/10 |
| ChatGPT | Custom dialogues, role-plays, grammar explanations | Yes | $20/month (Plus) | 8.8/10 |
| ELSA Speak | Student pronunciation practice | Yes, daily lessons | ~$12/month (Pro) | 8.6/10 |
| Quizizz | AI-generated vocabulary and grammar quizzes | Yes, solid basic tier | School/individual plans vary | 8.5/10 |
1. Twee — Built Specifically for English Teachers
Twee is one of the very few AI tools designed for English language teaching rather than adapted to it. Paste a text or a YouTube link and it generates discussion questions, dialogues, fill-in-the-gap exercises, multiple choice questions, and vocabulary work matched to a CEFR level you choose.
ESL use case: Turn a three-minute YouTube video into a complete B1 listening lesson — pre-teaching vocabulary, while-listening questions, and a follow-up discussion — in under ten minutes.
- Generates activities by CEFR level (A1 to C2)
- Creates dialogues, gap-fills, essay questions, and word-definition matching
- Works from YouTube videos, pasted texts, or a topic alone
- Exports to editable documents
Pros: Made for language teaching, CEFR-aware, very fast for listening lessons. Cons: Free tier caps the number of generations per month; output still needs a native-speaker sanity check for idioms.
Pricing: Free plan with limited monthly generations; the paid plan runs around $8 per month billed annually (check the site for current rates).
Best for: ESL teachers who build their own lessons from authentic materials and want CEFR-leveled activities in minutes.
2. Diffit — One Text, Every Proficiency Level
Diffit takes any article, passage, or topic and rewrites it at the reading level you choose, then adds vocabulary lists, comprehension questions, and summaries. For mixed-proficiency ESL classes, this is the single biggest time-saver on this list.
ESL use case: Take the grade-level science article your school requires and produce accessible versions for newcomers, intermediate learners, and near-fluent students — all covering the same content, so the whole class can discuss it together.
- Adjusts any text to a target reading level
- Auto-generates vocabulary lists with student-friendly definitions
- Creates comprehension and discussion questions
- Supports translated glossaries for multilingual learners
Pros: Core leveling features are free for teachers; excellent for content-based instruction and newcomers. Cons: Premium export formats and some sharing features sit behind the paid plan; leveled texts occasionally simplify away key nuance.
Pricing: Free plan for individual teachers covers the core leveling workflow; premium plans are roughly $15 per month, with school licenses available.
Best for: Teachers with newcomers and advanced learners in the same room who need one lesson at three levels.
3. Brisk Teaching — AI Inside Google Docs and Slides
Brisk is a free Chrome extension that adds AI actions directly into Google Docs, Slides, and websites. Instead of copying student writing into a chatbot, you click Brisk inside the document to generate feedback, level a text, or build a rubric.
ESL use case: Give targeted, glow-and-grow writing feedback on thirty student paragraphs without leaving Google Classroom — with feedback phrased in simple English your learners can actually understand.
- Writing feedback generated inside Google Docs
- One-click leveling and translation of web articles
- Rubric, quiz, and lesson-plan generators
- Inspect Writing feature shows a document’s revision history
Pros: Lives where your students already write; free tier is genuinely usable every day. Cons: Chrome-only; the most advanced feedback options have moved to the paid tier.
Pricing: Free core plan; premium is around $10 per month for unlimited use of the advanced tools.
Best for: ESL teachers in Google Workspace schools drowning in writing feedback.
4. ChatGPT — The Flexible Free Workhorse
ChatGPT needs no introduction, but ESL teachers use it differently than most professionals. Its free tier is a materials generator, a dialogue writer, and a grammar explainer that never gets tired of the question “but why is it ‘have been living’ and not ‘am living’?”
ESL use case: Generate a role-play script for ordering food at a restaurant with exactly the target grammar (present simple questions), exactly ten exchanges long, using only A2 vocabulary — then regenerate it for a doctor’s appointment scenario in thirty seconds.
- Custom dialogues, stories, and cloze exercises on any topic
- Grammar explanations at any complexity level, in the student’s first language if needed
- Instant word banks, sentence frames, and writing models
- Voice conversation mode for listening and speaking practice
Pros: Unmatched flexibility; strong multilingual support for contrastive explanations. Cons: Free tier has usage limits at peak times; you must write good prompts to get level-appropriate output, and everything needs a proofread.
Pricing: Free tier; ChatGPT Plus is $20 per month for higher limits and stronger models.
Best for: Teachers who want one flexible tool for materials, models, and explanations rather than a dozen single-purpose apps.
5. ELSA Speak — Pronunciation Practice That Scales
ELSA is an AI pronunciation coach: students speak into their phone and get instant, phoneme-level feedback on what they said versus what a fluent speaker would produce. You cannot sit with every student and drill minimal pairs — ELSA can.
ESL use case: Assign ten minutes of ELSA practice as homework targeting the specific sounds your class struggles with, then spend precious classroom time on communication instead of repetition drills.
- Speech recognition tuned for non-native accents
- Phoneme-level feedback with visual guides
- Placement test that maps student level
- Daily free lessons on the free plan
Pros: Feedback quality on individual sounds is excellent; students genuinely use it because it feels like a game. Cons: Free plan limits daily lessons; full course access requires Pro; less useful for intonation and connected speech than for individual sounds.
Pricing: Free plan with limited daily lessons; ELSA Pro is roughly $12 per month, with frequent discounts on annual plans.
Best for: Homework-based pronunciation practice, especially for students preparing for speaking exams.
6. Quizizz — AI Quizzes Your Students Will Ask For
Quizizz is a game-based quiz platform with an AI generator: paste your vocabulary list or reading text and it drafts a ready-to-play quiz. ESL students get the repetition they need for vocabulary retention, wrapped in music, memes, and a leaderboard.
ESL use case: End every vocabulary unit with a five-minute live Quizizz game, then assign the same quiz as spaced-repetition homework a week later.
- AI quiz generation from any text or topic
- Read-aloud accommodation for lower-literacy learners
- Live games plus self-paced homework mode
- Huge library of existing ESL quizzes to adapt
Pros: Genuine student enthusiasm; accommodations matter for ELLs; solid free tier. Cons: Some question types and larger AI limits are paid; the library’s quality varies wildly, so preview before you assign.
Pricing: Free basic plan for teachers; individual and school upgrade pricing varies, so check the site for current plans.
Best for: Vocabulary review and low-stakes assessment that students actually look forward to.
How to Get Started
Step 1: Pick one repetitive task, not one tool. Identify the prep job that eats most of your week — for most ESL teachers it is leveling texts or writing comprehension questions. Choose the single tool above that targets it (Diffit for leveling, Twee for questions).
Step 2: Run a two-week trial with real lessons. Use the tool for every lesson in one class for two weeks. Keep what it produces. At the end, compare the AI-assisted materials to what you would have made by hand and check honestly whether quality held up.
Step 3: Build a prompt bank. When ChatGPT or Twee gives you a great B1 dialogue, save the exact prompt in a document. Ten good saved prompts are worth more than any premium subscription.
Step 4: Check your school’s AI and data policy before student-facing use. Teacher-facing prep tools are usually fine; anything students log into (ELSA, Quizizz) may need approval under your district’s student-data rules. Ask first — it protects you and your learners.
Frequently Asked Questions
Are free AI tools safe to use with ESL student data?
Teacher-facing tools where you paste anonymized text are low risk. For anything requiring student accounts, check for COPPA/FERPA compliance (or your country’s equivalent) and get district approval. Never paste student names or identifying details into any AI tool.
What is the best free AI tool for making ESL worksheets?
Twee, by a clear margin — it is the only tool on this list built specifically for language teaching, and its gap-fills, dialogues, and CEFR-leveled questions need the least editing. Diffit is the better pick if your main problem is mixed reading levels.
Can AI tools really help with pronunciation?
Yes, within limits. ELSA’s phoneme-level feedback is excellent for individual sounds and word stress. AI is weaker on natural intonation and connected speech, so keep modeling those yourself in class.
Will AI replace ESL teachers?
No. AI generates materials; it does not build the trust that makes a nervous learner willing to speak. What it does replace is the hours of unpaid evening prep — and most teachers I know are happy to lose those.
Do these tools work for very low-level or non-literate learners?
Partially. Diffit can level texts down to early-reader complexity, and Quizizz’s read-aloud mode helps. But for true beginners and pre-literate learners, AI output still needs heavy adaptation — treat it as a first draft, never a finished lesson.
Conclusion
If you only install one tool from this list, make it Twee — it is the only one that thinks like a language teacher out of the box, and its free tier covers a normal teaching week. Pair it with Diffit the moment you have newcomers and advanced students in the same class, and let ELSA handle the pronunciation homework you never have time for.
The free tiers here are not crippled demos; they are enough to hand you back several hours a week. Start with one tool, one class, two weeks — and if you want to see what else is out there, explore more AI tools for professionals.