Nightspar features
Save words wherever you find them, get complete AI-built flashcards, and review them with spaced repetition. Everything below ships in the free beta.
Browser extension
Select a phrase on any page and save it in one click, sentence and all.
AI assistant (MCP)
Save words to your library from a ChatGPT or Claude conversation, over MCP.
Bulk import
Paste a list or a whole article, review what AI picked out, import it all at once.
Smart collections
Describe what belongs in a collection, and matching phrases gather themselves.
Spaced repetition
Every saved phrase becomes a flashcard, scheduled to return right before you forget it.
Try it yourself — free during the beta
Free during beta · no credit cardor try the demo first — no signup