Verify your Excel rows with BounceBlock
Lists in an Excel workbook often go unverified for years — a sheet that piles up dead addresses and duplicates. A CSV round-trip turns it into a verified list.
How to clean Excel data with BounceBlock
Why Excel rows need verifying
Excel stores text, not truth — it can't confirm deliverability or catch a duplicate that differs by capitalization.
Verifying email, phone and company in one pass — flat-priced, not per-verification credits — keeps your Excel rows deliverable and your reporting honest. A native sync is on the roadmap; today it's a quick CSV round-trip or a real-time API check.
Ready to see what’s hiding in your list?
Upload a file and preview your first 100 verifications free — email and phone, in one pass.
Frequently asked
Will my columns be preserved?
Yes — we keep your columns and append verification status and a score.
Both emails and phones?
Yes — validated together.
Free preview?
Yes — 100 rows.
Stop wasting hours on dead leads.
Upload your list and see how clean it really is — free, in under two minutes.