Email Validator

Validate email addresses, detect disposable domains, and extract clean lists. Free, private — all in your browser.

About Email Validator

Clean and validate your email lists with confidence. Our validator checks email format syntax, detects disposable/temporary email domains, and extracts clean lists — all in your browser with zero data uploads.

Smart Validation

Validates email format with regex, detects common typos, and flags disposable domains from an extensive blocklist.

Disposable Detection

Flags emails from 100+ known disposable and temporary email providers including Mailinator, GuerrillaMail, and 10MinuteMail.

Bulk Processing

Process hundreds of emails at once. Paste them in or upload a list. See results instantly with clear valid/invalid counts.

Private & Secure

All validation happens in your browser. Your email list never leaves your device. No servers, no tracking, no uploads.

📋 Common Use Cases

Email List Cleaning

Validate email addresses before sending campaigns. Remove invalid addresses, catch typos in domain names, and improve deliverability rates.

Phone Number Standardization

Normalize phone numbers from international customers into a consistent format. Ensure your CRM, dialer, or messaging system accepts every number.

Form Data Quality

Validate user-submitted data before storing it in your database. Catch errors at entry time rather than discovering them during analysis.

Database Migration Prep

Clean and validate data before importing into a new system. Find and fix format issues that would cause import failures.

🪜 How to Use This Tool

  1. Paste or upload your data
    Enter individual values or upload a file with multiple records. Most validators accept CSV, TSV, and plain text.
  2. Configure validation rules
    Set the level of validation, choose output format, or specify which checks to perform — syntax only, domain verification, or full deliverability.
  3. Review validation results
    See a summary of valid/invalid counts and per-record details. Invalid entries are flagged with the specific reason for failure.
  4. Export cleaned data
    Download validated records or fix issues directly. Separate valid and invalid entries for targeted cleanup.

📚 Related Guides

Frequently Asked Questions

Is this data tool free?▼
Yes. All data tools are completely free. No signup needed.
Is my data sent to a server?▼
No. All data processing happens in your browser. Your JSON, CSV, SQL, and text data never leaves your device.
Can these handle large files?▼
JSON formatter and CSV tools comfortably handle files up to ~10MB in browser. Performance depends on your device for larger datasets.