Free tool
Email List Hygiene Score
Paste a list and get a hygiene score from 0–100 based on syntax, duplicates, role and disposable addresses — all in your browser. Advanced mode folds in bounce rate and last-verified date.
How it works
- 1Paste your email addresses (one per line or comma-separated).
- 2We score syntax, duplicates, role and disposable ratios into a grade.
- 3Advanced: add your bounce rate and months since last verified for a fuller picture.
Questions
Frequently asked
What makes a list 'hygienic'?
Low duplicates, no malformed addresses, few role or disposable accounts, and a recent verification. This score weighs those signals into a single grade.
Is my list sent anywhere?
No — the scoring runs entirely in your browser. For live mailbox and catch-all checks, upload the list to BounceBlock.
Can I check a whole list at once?
This free tool checks one at a time. To verify a full list — email, phone and company together — upload a CSV to BounceBlock and preview your first 100 rows free.
Stop wasting hours on dead leads.
Upload your list and see how clean it really is — free, in under two minutes.
100 free creditsNo credit cardCancel anytime