Check whether an email address is structurally valid before you add it to a form, CRM or mailing list. The validator checks local-part rules, domain shape, consecutive dots and other common typos. Validation is local to your browser — no verification emails are sent and nothing is stored.
🔒 Your file is processed locally in your browser whenever supported. This tool runs entirely on your device — nothing you type or upload is sent to a server, logged, or stored.
No. Syntax validation cannot prove delivery. Only a confirmation email (double opt-in) verifies a mailbox actually receives mail.
Sub-addressing is a standard feature of many mail systems. A leading or trailing + in the local part is legal; this validator accepts it.
This tool checks one address at a time. For bulk lists, run each through the validator or use a spreadsheet formula plus spot checks — never upload a list to an untrusted online service.
| Platform | Supported | Offline | Local | Server | Network |
|---|---|---|---|---|---|
| WEB | Yes | Yes | Yes | No | Not required |
| PWA | Yes | Yes | Yes | No | Not required |
| ANDROID | Yes | Yes | Yes | No | Not required |
| IOS | Yes | Yes | Yes | No | Not required |
Validate URL syntax and inspect protocol, host and path.
Test a JavaScript regular expression against sample text.
Check email address syntax with clear pass/fail detail.
Estimate password entropy and get practical hardening tips. Checked locally only.
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