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AI document conversion for math, chemistry, tables and full PDFs

Khan Academy's AI tutor and teaching assistant for guided, Socratic learning

One AI study workspace with 25+ tools for essays, math, research and exam prep

Learn to code free with hands-on lessons and instant playgrounds

Study smarter for IELTS, TOEIC and HSK with AI speaking and writing rooms

PTE practice tests with instant AI scoring and realistic mock exams

Ace the Duolingo English Test with AI scoring and 18,000+ practice questions

Jupyter-native AI agent that writes, runs, and debugs your notebook code

Chat with an open reasoning model for free, straight from your browser

AI-coached CASPer practice questions and full mock tests

Curriculum-infused AI learning tools for children aged 5–12

AI homework help, essays, math and diagrams in 20+ tools

VRAM, throughput and GPU cost calculators plus courses for open-weight LLM deployment

AI-graded TOEFL practice tests with instant scores and feedback

Free multi-model AI chat without throttling

AI-powered diagnostic practice tests for SAT®, ACT®, PSAT/NMSQT® and AP® — scored in about 40 minutes

The AI spreadsheet that connects to your data and explains its answers

Free, open-source, local-first developer workspace for snippets, notes, APIs and diagrams

Unlimited AI-generated Cambridge English practice with instant feedback

Enterprise online exam platform with professional psychometrics

Open-source engineering calculators for civil and structural design

Solve equations and metric conversions as you type, right in your browser.

AI-adaptive LSAT drilling for Logical Reasoning and Reading Comprehension

Expert-reviewed digital SAT prep with adaptive tests and a curated question bank