Email Address Validator
Validate email addresses for correct syntax. Check single or bulk emails, detect disposable domains.
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About Email Address Validator
Validate email addresses for correct RFC 5322 syntax. Paste a single address or a list of addresses (one per line) to get instant validation results. Detects common issues: missing @ symbol, invalid domain format, missing TLD, consecutive dots, and disposable email domains (mailinator, guerrillamail, etc.). Shows a summary of valid vs. invalid addresses. All validation is client-side.
All processing happens entirely in your browser using modern web APIs. Nothing is uploaded to our servers — your data stays local and private. Free to use forever, with a Pro plan for power users who want an ad-free experience and API access.
Common use cases
- Validating a bulk email list before sending a campaign
- Checking email addresses collected in a form for obvious typos
- Filtering out disposable/temporary email addresses from a user signup list
- Verifying the email format of data imported from a spreadsheet
- Cleaning an exported contact list of malformed email addresses
How it works
Applies an RFC 5322-compliant regular expression to check the local part (before @) and domain part. The local part allows letters, digits, and special characters per the spec. The domain part must have at least one dot and a valid TLD. Disposable domain detection uses a curated list of known temporary email providers. No external API calls — everything runs in your browser.