Free tool

CSV Lead Cleaner and Deduplicator

Paste or upload a messy lead list. Get back a deduplicated, trimmed, properly cased CSV ready for your CRM. It all happens in your browser.

Runs 100% in your browser. Your file is never uploaded.

Build clean lists from the source

Leadsforlinked exports deduplicated, normalized LinkedIn leads to CSV, 1 credit per lead, no Sales Navigator required. Start with 100 free.

Get my 100 free leads

Then run outreach on it

Push your clean list into multi-step campaigns with a unified inbox and AI Responder, all in one tool.

See the platform

What the cleaner does

It parses your CSV, trims stray spaces, standardizes name casing, drops blank rows, and removes duplicates by email (or by LinkedIn URL when there is no email), ignoring tracking parameters and www differences. Everything runs locally. For building clean lists in the first place, see bulk export LinkedIn leads safely and export LinkedIn search results to CSV.

Frequently asked questions

Is my CSV uploaded?

No. It runs in your browser with JavaScript. The file never leaves your device.

How are duplicates detected?

By email if present, otherwise by LinkedIn URL, matched case-insensitively and ignoring tracking parameters and www.

What format do I need?

A standard comma-separated CSV with a header row. Quoted fields with commas are supported.