Pick the columns that decide a match and download the clean file.
Free for files up to 2,000 rows and 10 runs a day. Sign up for Dedupely to go further.
Match on the columns that matter
A spreadsheet dedupe compares whole rows. One extra space or a capital letter hides the duplicate. The same contact survives twice.
This tool matches on the columns you choose and ignores case and punctuation.
Stop cleaning the same export twice
The duplicates came from a CRM. Next month’s export has them back. A clean file does not clean the source.
Dedupely merges the duplicates inside your CRM and keeps new ones out.
Use it from a script or an AI agent
POST https://dedupe.ly/tools/api/csv-dedupe
{ "csv": "Email,Name\n...", "columns": ["Email"] }
MCP https://dedupe.ly/tools/mcp (tool: dedupe_csv)
Docs https://dedupe.ly/tools/api/openapi.json
Get started for free
20 free trial merges and as much free support as you need to get your duplicates under control.
Or sign up with Google
"Incredibly effective at tackling massive duplicate data cleanup - exactly what we needed."
D Wright
HubSpot User
HubSpot Marketplace Running CRM cleanup for clients? See the Partner Program
