Email Validator
Free email format validator: check address syntax in one second. Handy for form validation, developer debugging, and list hygiene — local rules only.
Input
Adjust options and run the tool.
Result
Your output appears here.
How it works
- Validation uses a simplified RFC 5322 regex.
- Common typos trigger a suggestion.
About this tool
What email format validation does
Before pasting an address into a signup form or script, check basic syntax: presence of @, a plausible domain, and a TLD. This tool runs local rules only — no remote DNS lookup, and your input never leaves the browser.
When to use it
Form debugging, quick list hygiene before a bulk import, and double-checking a copied temporary address. For alias / role / disposable-domain hints, use the email privacy checker.
With Freetempmail
Addresses from the homepage are already well-formed. Use this tool when you need to validate strings from elsewhere. After validation, pair accounts with a unique secret from the password generator.
Related tools
Free online email extractor: pull addresses from text, logs, or HTML in your browser. Local-only — no upload, with a privacy warning for bulk lists.
Free email privacy checker: detect aliases, role prefixes, and disposable-domain signals. Local rule checks only — your email never leaves the browser.
Free Base64 encode/decode tool with UTF-8-safe handling in your browser. Useful for tokens, email attachment headers, and API payload debugging.