Free Email Verifier & Validator
Check and Find Email Addresses Instantly
Verify email addresses in real-time. Check if emails are valid, working, and deliverable. Reduce bounce rates and improve email campaign success with our professional email verification tool.
🧩
Chrome Extension Required
To validate emails, you need to install our Chrome extension.
Manual Installation Instructions:
Step 2: Install Extension
- Extract the downloaded ZIP file to a folder
- Open Chrome and go to
chrome://extensions/ - Enable "Developer mode" (top right toggle)
- Click "Load unpacked" and select the extracted extension folder
- The extension will appear in your toolbar
Enter an email address to check if it's real and working
Find emails using different discovery methods
Enter a LinkedIn profile URL to extract their personal email
Enter name and company website to retrieve the email associated
AI-powered discovery finds all working emails at any company domain
Validate multiple emails, LinkedIn URLs, or contacts at once by entering them one per line
Free REST API for developers - No authentication required
check_circle
100% Free
No API keys, no registration, no fees
speed
Rate Limits
100/hr single • 10/hr bulk • 5/hr discovery
public
CORS Enabled
Use from any domain or application
https://www.startuphub.ai/wp-json/email-validator/v1
Validate an email address
curl -X POST https://www.startuphub.ai/wp-json/email-validator/v1/validate \
-H "Content-Type: application/json" \
-d '{"email": "[email protected]"}'Find email from name + company
curl -X POST https://www.startuphub.ai/wp-json/email-validator/v1/discover \
-H "Content-Type: application/json" \
-d '{
"firstName": "Sam",
"lastName": "Altman",
"domain": "openai.com"
}'POST /validate Validate a single email
POST /validate/bulk Validate multiple emails (max 100)
POST /discover 🔥 Find email from name + company
GET /status API health check
GET /docs JSON documentation
Valid Emails Found:
Business Emails:
Personal Emails:
No valid emails found with the provided information.
📧
Make sure you're logged into Gmail in this browser for accurate validation.
Everything you need to find and verify professional contacts.
StartupHub.ai provides powerful tools for sales teams, recruiters, and marketers to build accurate contact lists.
verified_user
Single Email Verification
Instantly check if any email address is valid and deliverable in real-time.
person_search
LinkedIn Email Finder
Extract and verify professional email addresses directly from LinkedIn profiles.
format_list_numbered
Bulk List Cleaning
Upload CSV files to validate thousands of contacts and export clean lists.
Our Multi-Layer Verification Process
Every email goes through five independent validation checks to guarantee 99%+ accuracy:
Syntax Validation
Confirms proper email format according to RFC 5322 standards and character encoding
Domain Verification
Checks DNS records to ensure the domain exists and has active mail servers
SMTP Authentication
Connects to mail servers to verify the specific mailbox accepts messages
Disposable Email Detection
Flags temporary email services that expire after short periods
Catch-All Detection
Identifies domains configured to accept emails to any address
The Business Impact of Email Verification
trending_down
Cut Bounce Rates by 98%
Hard bounces destroy sender credibility with ESPs like Gmail and Outlook. Keep your bounce rate under 2% to maintain inbox placement and avoid spam filters.
inbox
Maximize Campaign ROI
Reach more prospects in the primary inbox instead of spam. Clean lists mean higher open rates, click-through rates, and conversions for every campaign.
savings
Stop Wasting Marketing Budget
Email platforms charge per contact regardless of validity. Remove 15-30% of invalid addresses before import to slash monthly costs and improve targeting.
shield
Build Long-Term Deliverability
Consistent email hygiene establishes trust with ISPs. Maintain a strong sender score and domain reputation for sustainable email marketing success.
Frequently Asked Questions
What is email verification? −
Email verification is the process of validating that an email address is valid, active, and able to receive messages. It checks syntax, domain configuration, and mailbox existence without sending actual emails.
How accurate is the email validator? +
Our email verification system achieves 99%+ accuracy through multi-layer validation including syntax checks, DNS verification, SMTP validation, and mailbox confirmation. We use real-time checks to ensure the most current status.
Can you verify Gmail, Yahoo, and Outlook addresses? +
Yes! Our system successfully verifies email addresses from all major providers including Gmail, Yahoo Mail, Outlook/Hotmail, AOL, and thousands of other domains worldwide.
Is email verification legal and safe? +
Absolutely. Email verification is a standard best practice in email marketing and communication. Our process never sends emails to the addresses being verified - we only check technical configurations and deliverability.
What's the difference between syntax validation and full verification? +
Syntax validation only checks if an email follows the correct format (like [email protected]). Full verification goes further by confirming the domain exists, has mail servers configured, and the specific mailbox can receive messages.
How long does email verification take? +
Single email verification happens in real-time, typically within 1-3 seconds. Bulk verification speed depends on list size, but we process thousands of emails per minute.
What types of invalid emails are detected? +
We detect: invalid syntax, non-existent domains, disabled mailboxes, full mailboxes, temporary/disposable addresses, role-based emails (info@, admin@), catch-all domains, and spam traps.
Can I verify emails before adding them to my mailing list? +
Yes! That's exactly what our tool is designed for. Verify emails at the point of collection (form submission) or before uploading to your email marketing platform to maintain list hygiene from day one.