Free CSV tools for contact lists

Dedupe and clean a contact list in a minute with tools your AI agent can call too.

Pick a tool

CSV dedupe

Name splitter

Email normalizer

List merger

Domain extractor

Company normalizer

Test data generator
A chat where an assistant calls the dedupe tool over MCP and reports the rows in, rows out and duplicates removed.

Built for people and for AI agents

A chat assistant gets asked to clean a list. It has no tool to call. It writes a script that half works.

Every tool here is also an MCP server and a JSON API any agent can call.

Use it from a script or an AI agent

Use in Claude 
GET  https://dedupe.ly/tools/api                  the six tools and their limits
GET  https://dedupe.ly/tools/api/openapi.json     OpenAPI 3.1
POST https://dedupe.ly/tools/api/<tool>           JSON in, JSON and CSV out
MCP  https://dedupe.ly/tools/mcp                  Streamable HTTP, no auth
     https://dedupe.ly/.well-known/api-catalog    RFC 9727 catalog

OpenAPI document · API index · llms.txt

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20 free trial merges and as much free support as you need to get your duplicates under control.

"I was really pleased with Dedupely. It's highly configurable and works well when used manually or for automated deduping."

Laura R

Salesforce User

Salesforce AppExchangeSalesforce AppExchange

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