Email Unsubscribe Link Validator

Email Unsubscribe Link Validator checks your email HTML for visible opt-out links, common unsubscribe wording, mailto targets, merge-tag placeholders, and optional List-Unsubscribe header text. It gives you a structured pre-send report so you can confirm that the essential unsubscribe experience is present before a campaign goes live.

A valid link in source code is not the same as a working subscriber experience. Use this browser-based validator to catch obvious template issues, then send a real test email, click the link, and complete the opt-out process in your email platform. Your HTML is analyzed locally and is not stored.

• Visible-link discovery: Finds anchor tags and checks their link text for unsubscribe and preference wording.
• URL structure checks: Distinguishes HTTPS, mailto, relative, placeholder, and missing destinations.
• Merge-tag awareness: Identifies ESP-style placeholders that require a real preview or test send.
• Optional browser link test: Attempts a request for publicly accessible HTTP(S) unsubscribe URLs.
• List-Unsubscribe review: Parses header text when you paste it alongside your campaign HTML.
• Compliance-oriented guidance: Flags missing or hard-to-recognize opt-out language for human review.
• Private HTML analysis: No account or upload needed.

1. Paste the final email HTML exported from your ESP or template.
2. Optionally paste List-Unsubscribe header values from your sending setup.
3. Run the validator to locate visible unsubscribe and preference links.
4. Review each finding, especially placeholders, relative URLs, or links without clear opt-out text.
5. Test a sent message in a real inbox, click the unsubscribe link, and confirm the request is honored.

Standard link: <a href="https://example.com/unsubscribe?token=...">Unsubscribe</a> is a visible HTTPS opt-out link that can be structure-checked.

ESP placeholder: <a href="*|UNSUB|*">Unsubscribe</a> must be verified in a Mailchimp preview or sent test because it resolves only when the platform processes the campaign.

List-Unsubscribe: List-Unsubscribe: <mailto:unsubscribe@example.com>, <https://example.com/unsub> can support mailbox-provider unsubscribe controls but should supplement, not replace, the footer link.

• Prevent compliance gaps: Catch a missing or broken-looking opt-out footer before sending.
• Improve subscriber trust: Make preferences and unsubscribe options clear and easy to use.
• Speed up email QA: Review every candidate link in one place.
• Support deliverability: A straightforward opt-out path can reduce spam complaints.
• Keep templates private: Analyze email HTML locally in your browser.