Pick where the records are going, drop in the CSV or spreadsheet, and find out what the import would reject, truncate or silently merge.
.csv, .tsv or .xlsx, up to 50 MB
No file to hand?
The file is parsed in this browser tab. It is never uploaded — no code here sends it. What the browser enforces is narrower: this page can reach no server but our own and Cloudflare's analytics, which never receives your file.
