Free Bulk Email Verifier —
Clean Your List in Minutes.
Upload a CSV or TXT file to remove invalid, disposable, and duplicate email addresses for free. Our free email list cleaner processes thousands of addresses with real-time progress and exports clean, invalid, and risky emails as separate files.
Free plan: 100 verifications/day · No credit card required
What our free email list cleaner removes
Every email in your list is run through a multi-layer scrubbing process to identify and remove addresses that will harm your sender reputation.
Invalid Email Addresses
Addresses that fail syntax validation or whose domain has no MX records — guaranteed bounces.
Disposable & Temporary Emails
Throwaway addresses from providers like Mailinator or Guerrilla Mail that inflate your list with junk.
Non-Existent Mailboxes
Addresses that look syntactically valid but whose mailbox doesn't exist — caught via SMTP check.
Duplicate Addresses
Exact duplicates in your list are automatically deduplicated before verification to save credits.
Catch-All Addresses
Domains that accept all email regardless of whether the mailbox exists are flagged as 'risky'.
Hard Bounce Sources
Any address that caused a hard bounce in a previous send is identified and separated for removal.
How to clean your email list for free
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1
Create a free account
Sign up in under 30 seconds — no credit card, no spam. Free plan includes 100 verifications per day.
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2
Upload your CSV or TXT file
Drag and drop your email list file (CSV or plain text, one email per line). Files up to thousands of rows are supported.
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3
Watch real-time progress
ListEmailCheck processes your list asynchronously with a live progress bar. Syntax, MX, and SMTP checks run in parallel.
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4
Download clean results
When done, download three separate files: ✅ Valid emails · ❌ Invalid emails · ⚠️ Risky emails. Import the clean list directly into your ESP.
Bulk Email Verifier — FAQ
How do I clean an email list for free?
Sign up for a free account, go to your dashboard, and upload your CSV or TXT file. The free plan gives you 100 verifications per day with no credit card required.
What formats are supported for bulk upload?
CSV files (with an email column) and plain TXT files (one address per line) are both supported.
Can I remove duplicate emails free?
Yes. Duplicates in your uploaded list are automatically removed before verification, so you don't waste credits.
Does the free bulk verifier check for disposable email addresses?
Yes. Every address is checked against a continuously updated database of disposable and temporary email providers.
What is a catch-all email verifier?
Some domains are configured to accept all incoming email regardless of whether the mailbox exists. These are called catch-all addresses. ListEmailCheck detects and flags them as 'risky' so you can decide whether to include them in your sends.
How is a free B2B email list cleaner different from a consumer one?
B2B lists often have more catch-all domains (corporate mail servers), role-based addresses (info@, sales@), and strict SMTP servers. Our verifier handles all of these and separates them into appropriate result buckets.
Clean your first list for free today
No credit card required. Free plan includes 100 verifications/day. Upgrade anytime for unlimited bulk cleaning.
Create Free AccountAlso see: Free Email Validator · Email Bounce Checker