CSV schema guesser — infer types & column stats (local)
Paste CSV to guess per-column types (integer, number, boolean, date, email, URL, string, mixed) plus empty/unique counts, numeric min/max/mean, and sample values. Delimiters auto-detected; nothing uploaded.
Frequently asked questions
No. CSV profiling runs entirely in your browser with Papa Parse; data is not uploaded or stored. Nothing is sent to LocalTools servers for processing.
Types are heuristics from cell patterns (numbers, ISO dates, emails, URLs, yes/no). Mixed appears when non-empty values disagree without a clear majority. Use results for exploration, not as a formal database schema.