Markdown, PDF, Word, HTML, CSV, text — indexed instantly
— applied to files you add next; helps resolve conflicting answers by recency.
Settings
AI answers
When on, Crystal reads the top results and writes a short answer in plain
English, with clickable citations back to the source. When off, it shows the single most
relevant passage exactly as written — no AI, no cost. Requires a Claude (Anthropic) key.
Smarter search
By default Crystal matches the words in your question. Turn on smarter
search to also match by meaning — so “time off” still finds the “PTO policy” even when
the wording differs. Pick one option below; leave all blank to stay
keyword-only (free, offline). Already-indexed documents will offer a quick re-index.
Best when documents are sensitive. Needs more memory and is a little slower.
Keys are stored only on this server and are used solely to call the provider
you turn on. They’re never shown again after you save and never sent anywhere else.