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Email Validator

Validate single email addresses or a whole list. Checks format, syntax, length limits, and top-level domain against the real IANA TLD list, with clear per-error explanations. Batch mode + CSV export. 100% private.

100% Private Works Offline Instant

About Email Validator

Validate single email addresses or a whole list. Checks format, syntax, length limits, and top-level domain against the real IANA TLD list, with clear per-error explanations. Batch mode + CSV export. 100% private. Everything runs locally in your browser — your data never leaves your device.

How to use

  1. Enter your input in the tool above.
  2. Adjust any options to your preference.
  3. Use the Copy or Download buttons to save the result.
  4. Everything happens locally — your data never leaves your browser.

FAQ

Does this actually send an email?

No. It performs a fully local, standards-aware syntax check. It never sends network requests, so you can validate a list privately.

What does it check?

Valid characters and structure (local@domain), allowed special characters in the local part, length limits (max 64 local / 255 total), domain format, and the TLD against the real IANA list (e.g. .com, .org, .in, .dev).

What extras does it have?

Extras: (1) Single + batch modes; (2) Per-email pass/fail with reason; (3) IANA TLD check; (4) Length and character rules; (5) Summary counts; (6) Copy results; (7) CSV export; (8) 100% offline.

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