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Free email open tracking for Gmail. See a ✓✓ the moment your email is read — in real time. Seenly — Free Email Open Tracker for Gmail Know the exact moment your email is read. Seenly adds real-time ✓✓ read receipts to Gmail, so you never have to wonder whether your message landed. When you send an email from Gmail, Seenly quietly attaches an invisible tracking pixel. The instant your recipient opens the message, you see a ✓✓ read receipt — updated live, no refreshing, no polling. ★ WHAT YOU GET • Real-time ✓✓ read receipts — see opens the moment they happen • Works right inside Gmail — in your Sent list, inside the thread, and in the Seenly popup • Completely free — no trials, no credit card, no per-email limits • Clean and lightweight — built to feel like a native part of Gmail • Optional "Sent with Seenly" footer you can turn on or off anytime • Sign in securely with your Google account ★ HOW IT WORKS 1. Install Seenly and sign in with Google. 2. Compose and send an email from Gmail as you normally would. 3. Watch for the ✓✓ — it appears the instant your email is opened. ★ PRIVACY FIRST Seenly only tracks emails YOU send. Your data belongs to you — read events are tied to your account and are never shared or sold. Seenly requests only the minimal Google permissions needed to identify you (name and email). See our privacy policy for full details. Stop guessing. Start knowing the moment your email is read — with Seenly.
Aug 26, 2026
rating_count is the Chrome Web Store ratings count, not a written-review count.
Media assets
Screenshots and videos on the listing.
Has promo video
Whether the listing includes at least one video.
Languages
Declared language locales.
Developer website
Listing exposes a developer website URL.
Contact email
Listing exposes a contact email.
Keyword in name
Case-insensitive substring match in the name.
Keyword in description
Case-insensitive substring match in the description.
Keyword occurrences in description
Count of case-insensitive occurrences in the description.
Category user-count percentile
Share of same-category extensions with fewer users (null if unknown).
These are transparent listing completeness / keyword signals, not a prediction of Chrome Web Store search ranking.