Validate Email List Free: Bulk Email Checker Online
Validate an email list free online: instantly separate valid from invalid addresses, remove duplicates, and copy clean bulk lists — in your browser, no uploads.
Sending to a dirty email list is one of the fastest ways to land in spam folders. Invalid and malformed addresses bounce, and too many bounces tell inbox providers your mail is untrustworthy. Cleaning the list first protects your deliverability.
You don't need a paid service for the first, most important pass: catching addresses that are structurally invalid, duplicated, or inconsistently cased.
What 'validation' catches
- Missing @ or domain: entries like 'jane@' or 'not an email'.
- Bad structure: doubled dots, trailing dots, or missing top-level domains.
- Duplicates: the same address repeated, often with different casing.
- Whitespace and stray punctuation from copy-pasted spreadsheets.
Validate your list step by step
- 1Open the Email Validator and paste your list — one per line, or comma-separated, or straight from a CSV column.
- 2Turn on Deduplicate and (optionally) Lowercase to normalize the list.
- 3Read the pass-rate summary: how many valid, how many invalid, how many duplicates were skipped.
- 4Use the one-click Copy buttons to grab the clean 'valid' list and the 'invalid' list separately.
What to do with the results
Send to the valid list with confidence. Keep the invalid list too — it's worth scanning for fixable typos (like 'gmial.com') that you can correct and recover instead of discarding.
Because the tool runs entirely in your browser, your subscribers' addresses never touch a server — important when you're handling personal data under GDPR and similar rules.