Vocabulary Builder
Commercial use OK
380+ models
No watermark
No sign-up needed
Model:
+ GPT-5, Claude, Gemini
Build a vocabulary set from a word list or a topic. For each word: IPA pronunciation, part of speech, level-appropriate definition, 2 example sentences showing the word in natural context, a memory-trick mnemonic, synonyms + antonyms, and Latin / Greek / Old-English etymology. Output formats: detailed word cards, CSV for Anki import, word-family trees, fill-in-the-blank worksheet, or a full quiz with answer key.
Vocabulary set
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Build vocabulary with free AI. Learn new words with definitions and examples.
How to Use Vocabulary Builder
1
Enter your input
Type text, upload a file, or describe what you want. No account needed.
2
Click generate
Our AI processes your request in seconds using the best open-source models.
3
Download & share
Download, copy, or share your result. Free for personal and commercial use.
Use this tool via API
Automate this tool from your own code. OpenAI-compatible REST endpoint, Bearer-token auth, no extra SDK required. Token costs match the web interface.
curl -X POST https://api.free.ai/v1/chat/ \
-H "Authorization: Bearer sk-free-..." \
-H "Content-Type: application/json" \
-d '{"model": "qwen7b", "messages": [{"role": "user", "content": "Explain quantum entanglement for a 5-year-old."}]}'Vocabulary Builder — FAQ
Free.ai Vocabulary Builder generates full study cards from a word list, topic, or pasted passage. Each card includes IPA pronunciation, part of speech, level-appropriate definition, 2 example sentences in natural context, memory-trick mnemonic, synonyms + antonyms, and Latin/Greek/Old-English etymology. Output in 5 formats: word cards, Anki-importable CSV, word-family trees, fill-in-the-blank worksheet, or multi-type quiz with answer key.
Quizlet is $7.99/month for AI features. Anki is open-source free but you build cards yourself. Vocabulary.com is $5-16/month. Memrise is $8.99/month. Magoosh GRE Vocab is $129/6mo. Duolingo is $6.99-12.99/month. Free.ai generates ready-to-study cards free and can export to Anki CSV for spaced-repetition review. Pair with Anki for the actual SRS study sessions.
Yes — Qwen 3 30B on our GPUs. A 10-card vocabulary set with full details costs about 600 tokens. Free accounts get 10,000 signup tokens — enough for ~15 vocabulary sets. Premium models produce richer example sentences and more accurate etymologies.
Yes — three input modes: (1) "Word list I have" — you paste words, get cards for each. (2) "Topic — you pick the words" — enter a topic ("SAT vocabulary", "medical terminology", "diplomatic language") and the model picks level-appropriate words. (3) "Extract from passage" — paste a chapter or article and it mines the most study-worthy words, skipping common vocabulary.
Yes — pick "Anki CSV" output format and the download is a ready-to-import CSV with headers word, definition, example, pronunciation, synonyms, etymology. In Anki: File → Import → pick the CSV, map fields, import. Alternatively pick "Word cards" output and the Download-CSV button still converts cards to Anki format.
Yes — the system prompt requires verified etymologies or a 'etymology uncertain' flag. It will NOT invent Greek/Latin roots for words that actually come from Old French or Germanic sources. Cross-check with Etymonline or the OED for competition-level GRE prep.
No — first set runs free, no email, no credit card. Creating a free account unlocks 10K signup tokens, 7-day share links (24h anonymous), generation history, and premium model access.
10 levels: Elementary / Middle school / High school / SAT-ACT prep / TOEFL-IELTS / College / GRE-graduate / Medical (pre-med) / Legal (LSAT) / Professional-business. The system prompt calibrates definitions, example sophistication, and etymology depth to match. A "GRE" level gets Tier-1 abstract vocabulary; "Medical" gets anatomical + pathological terms.
Yes — pick 'Quiz + answer key' output format and get a mixed-type quiz (multiple choice definition match, fill-in-the-blank in context, synonym/antonym match) with a full answer key at the end. Good for self-testing before an exam or as a teacher handout. Fill-in-the-blank mode gives a worksheet with a word bank + separate answer key.
Yes — Print button opens a Georgia-serif print-optimized view of the full cards. For physical index-card flashcards: download Anki CSV, use FlashCardMachine or similar to print. For a nicer handout: download .md, open in any markdown previewer (Obsidian / Typora / Marked), print.
Yes — 11 built-in languages (English, Spanish, French, German, Italian, Portuguese, Japanese, Korean, Chinese, Arabic, Russian) and any of the 99 Free.ai languages via topic mode. Target words stay in their original language; definitions, examples, and notes appear in the chosen display language.
Yes — POST to /v1/chat/ with the vocabulary-builder system prompt (see template source). Useful for test-prep platforms building personalized word sets or LMS plugins generating vocabulary study guides from uploaded readings. Bearer auth, monthly limits. Docs at /api/.
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