# Free Email List Checker: Dedupe and Analyze

Paste a list. The analysis runs in your browser, so nothing is uploaded until you choose to verify.

## How it works
1. **Paste your list.** Paste addresses one per line, or separated by commas.
2. **Review the X-ray.** See duplicates, malformed rows, role accounts and free-mail share, computed locally.
3. **Verify a sample.** Send up to 20 addresses to the live checker and download the clean results.

## FAQ
**Is my list uploaded?**
No. The analysis runs in your browser. Only if you press Verify are up to 20 addresses sent to the live checker.

**How many addresses can I verify here?**
This page verifies up to 20 at a time. Sign up free to verify full lists.

**What file formats does the full product accept?**
CSV, TXT and XLSX, parsed in your browser before you confirm.