IB Essay Grader — Free AI Feedback on IA, Extended Essay & TOK
IBLens is a free AI essay grader for IB students. Paste your Internal Assessment, Extended Essay, or TOK Essay and get criterion-by-criterion feedback with a predicted score in 60 seconds — against the official IB rubric for your subject. No account required for your first analysis.
Subjects and work types supported
IBLens grades all major IB assessment types:
- Internal Assessments (IA): Biology, Chemistry, Physics, Economics, History, Psychology, Mathematics (AA and AI), Computer Science, Business Management, and English A
- Extended Essay (EE): All subjects — the Extended Essay grader uses the universal EE rubric and applies subject-specific knowledge expectations
- TOK: Both the TOK Essay (1,600-word prescribed title essay) and TOK Exhibition (three-object commentary)
How IBLens works
- Select your work type and subject — IBLens loads the official IB rubric for your specific assessment
- Paste your text — copy and paste from your word processor; no file upload required
- Add your research question or title (optional) — helps the AI evaluate whether your analysis addresses the question
- Get your feedback in 60 seconds — a predicted score for each criterion with specific, actionable improvement suggestions
How IBLens compares to RevisionDojo
IBLens and RevisionDojo are both AI IB essay graders. The main differences:
- Pricing: RevisionDojo charges $19/month subscription. IBLens charges per analysis ($4.99) with a free first analysis — better value for students who only need occasional feedback.
- No account needed: IBLens lets you run your first analysis without creating an account. RevisionDojo requires registration.
- TOK Exhibition: IBLens grades TOK Exhibitions against the official rubric. RevisionDojo also supports this.
Frequently asked questions
- Is IBLens free?
- Every essay gets a free preview (band range, weakest criterion with full feedback, top risks). The full report unlocks for $4.99, or $19.99 for a pack of five.
- How accurate is the AI grading?
- IBLens uses the official IB rubric descriptors for each subject and assessment type. The predicted score closely approximates what an experienced examiner would award — but your teacher's assessment is always the official mark.
- Is my essay stored or used to train AI?
- No — your essay is sent to the AI for analysis and not stored permanently. IBLens does not use student essays to train AI models.
- Can I grade my essay more than once?
- Yes — many students grade a draft, then revise and grade again. Each analysis uses one credit. A pack of five analyses ($19.99) is designed for iterative improvement across drafts.
Why students use IBLens
- Marks against the official IB assessment criteria for each subject and component — including both Extended Essay rubrics: the current 34-mark criteria (through November 2026) and the new 30-mark May 2027 criteria.
- $4.99 for a full report — no subscription, you pay per essay.
- Free preview on every essay: predicted band range and your weakest criterion, no account needed.
- Covers Internal Assessments across 17 subjects, the Extended Essay, the TOK essay and the TOK exhibition.