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Check your video SEO score before publishing. AI-powered title optimizer, tag viewer, and keyword research for YouTube creators. TubeCheckr — YouTube SEO Score & AI Title Optimizer Check your video SEO score before publishing. Get real-time feedback on your title, description, and tags to maximize views and discoverability. KEY FEATURES: SEO Score Panel (YouTube Studio) - Real-time SEO scoring as you edit your video details - Title analysis: length, power words, numbers, capitalization, hooks - Description analysis: length, structure, links, timestamps, hashtags, CTAs - Tag analysis: count, uniqueness, keyword variety - Letter grade (A-F) with actionable improvement suggestions Tag Viewer (YouTube Watch Pages) - Instantly see any video's tags below the player - One-click copy all tags to clipboard - Auto-updates when navigating between videos (SPA-aware) Keyword Research (Side Panel) - Search YouTube keyword suggestions - Click any suggestion to copy it - Find trending topics and long-tail keywords HOW IT WORKS: 1. Install TubeCheckr 2. Add your YouTube Data API key in the popup (free from Google Cloud Console) 3. Browse any YouTube video to see its tags 4. Open YouTube Studio to get real-time SEO scoring on your videos PRIVACY: - No data collection — all analysis runs locally in your browser - Your API key is stored locally and never sent to our servers - No account required PERFECT FOR: - YouTube creators optimizing video SEO - Content strategists researching competitor tags - Marketing teams managing YouTube channels FREE to use. Pro features (AI-powered title optimization) coming soon. Need help? Report issues at: https://github.com/user/tubecheckr/issues