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Score titles, thumbnails and captions before you publish — YouTube, Instagram, TikTok, blogs and more. Works anywhere you publish — open the extension on any site, pick your platform, paste your title, upload your thumbnail, and get a score. YouTube, Instagram, TikTok, LinkedIn, blogs, email subject lines. WHAT IT DOES Clks Score (1–100) — how likely people are to click, plus separate Emotion and Curiosity ratings Instant rewrites — three stronger versions of your title, one click to copy Thumbnail review — a score for your thumbnail with specific, concrete fixes Description & tag suggestions — SEO help without leaving the page Works everywhere you publish — YouTube videos, and any page title you paste in HOW TO USE IT Click the ClksOptimal icon and log in with your free account On any YouTube video, click the Clks Score button to score that title instantly In YouTube Studio, click the ClksOptimal badge on any of your video thumbnails for a full review — title, thumbnail, description tip, and tags WHO IT'S FOR Creators, marketers, bloggers, and social media managers — anyone whose work lives or dies by whether people click. FREE TO START Create a free account at https://clksoptimal.com and get started immediately. Paid plans unlock unlimited analyses, AI thumbnail generation, competitor insights, video ideas, goal tracking, and Clks Coach, our AI growth assistant. PRIVACY We only send the title (and, when you ask for a thumbnail review, the thumbnail image URL) to our servers for analysis. We never collect your browsing history, and we never sell data. Full policy: https://clksoptimal.com/privacy.html Questions or feedback? clksoptimalsupport@gmail.com
Sep 7, 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.