Clean a CSV File in two minutes
A raw CSV exported from any tool is the lowest common denominator of contact data — invalids, duplicates, mistyped domains and dead phone numbers all jumbled together. Uploading it to BounceBlock turns that messy export into a verified, deduplicated file you can hand to any system with confidence.
What's hiding in your list
Exports from different tools use inconsistent column names and formats, making manual cleanup slow and error-prone.
Duplicates hide behind formatting differences — the same person with two capitalizations or a trailing space slips past a basic dedupe.
A spreadsheet can't tell you whether an address is deliverable or a number is connected; it only sees the text.
Email and phone — cleaned in one pass
Verify in one pass
Every email checked for deliverability and every phone validated — in a single upload.
Catch what others miss
Typos, catch-all domains, disposable addresses, dead numbers and silent duplicates.
Flat, simple pricing
Upload a CSV and get a verified file back in minutes. No per-credit math, no surprise overage bills.
Clean leads in three steps
No setup, no integrations, no learning curve. Upload a file, download a better one.
Upload your CSV
Drag in any contact list. We auto-detect email, phone, name and company columns.
We verify everything
Every email checked for deliverability, every phone validated, duplicates flagged — with a live quality score.
Download clean leads
Export a verified, deduplicated list your team can actually call and email.
Email and phone, cleaned in a single upload — see exactly how many bad contacts are hiding in your list before you pay a cent.
100 free verifications · no credit card · results in under 2 minutes
Frequently asked
What formats can I upload?
Any CSV from a CRM, spreadsheet or email tool — BounceBlock auto-detects the email, phone and company columns on upload.
Does it deduplicate the file?
Yes — duplicates are caught even when formatting differs, and you get back a clean, annotated file.
What do I get back?
A verified CSV with each row's email and phone status, a quality score, and duplicates removed — ready to re-import anywhere.
Stop wasting hours on dead leads.
Upload your list and see how clean it really is — free, in under two minutes.