ListScrub — Clean your lead list in 60 seconds. Nothing leaves your browser.

How it works

1. Paste or upload
Drop in your CSV or paste it directly. No account, no sign-up.

2. Clean instantly
ListScrub flags invalid emails, normalizes phone numbers, and dedupes — all inside your browser.

3. Download
Get an import-ready CSV plus a before/after summary.

Why not just use Excel?

Excel dedup only catches exact matches and doesn't validate email syntax or normalize phone formats. ListScrub does both in one click, with a clear before/after report — no formulas required.

Why not a verification API?

Bulk email verification services require uploading your list to their servers and charge per lookup. ListScrub never uploads your data — it's not a deliverability checker, it's a fast, private cleanup tool for formatting, syntax, and duplicates. If you need live mailbox verification, run that separately after cleaning formatting here.

Pricing

Free

Up to 200 rows per run. Full cleaning features. CSV export.

Pro

$19 one-time

Unlimited rows, saved custom column-mapping rules. No subscription.

Buy Pro on Gumroad →

FAQ

Does this verify if emails actually work?: No — it checks formatting/syntax and flags obviously invalid or disposable addresses, but does not do live mailbox/deliverability checks.
Where does my data go?: Nowhere. All processing happens locally in your browser. The only network call the extension ever makes is an optional one-time license check when you enter a Pro key — that call contains no contact data.
What list sizes work best?: Tested up to several thousand rows. Free tier caps at 200 rows per run.

Add to Chrome — Free