Polish your video description before upload. Check length, links, hashtags, chapter lines, and keyword balance — with clear suggestions in seconds.
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YouTube Description Optimizer & SEO Analyzer
YouTube Description Optimizer
Analyze description length, links, hashtags, chapters, and keyword density.
Video description
Free · API · MCPToolYour platform
Use YouTube Description Optimizer & SEO Analyzer three ways
The free YouTube Description Optimizer & SEO Analyzer on this page works in your browser. The same workflow is available via REST API for apps and via MCP for Cursor, Claude, and other agents — one API key, one plan, one quota. This tool is part of the youtube-tools module under Digital Tools.
- Free in browserUse YouTube Description Optimizer & SEO Analyzer here — no account required.
- REST APICall from your server with
X-Api-Key. - MCP for agentsConnect Cursor or Claude to ToolYour MCP with the same key.
- 1. Get an API keySign in and open Dashboard → API Keys (works for REST and MCP).
- 2. Call or connectUse the REST API from your server, or paste the MCP URL into your agent config.
- 3. Same qualityOutput matches the free web tool across all three surfaces.
What is YouTube Description Optimizer & SEO Analyzer?
The description helps viewers and search engines understand your video. The first few lines often appear in Google and YouTube search snippets, and chapters help people jump to the right section. Paste your full description — links, hashtags, timestamps, and all — to see character count, how many hashtags you used (YouTube allows up to 15), which chapter lines were detected, which links you included, and which words repeat most often. You also get targeted suggestions, such as expanding thin opening lines or adding chapters for longer videos. Use it as a final checklist before every upload.
What are common questions about YouTube Description Optimizer & SEO Analyzer?
How many hashtags can I use?
YouTube allows up to 15 hashtags in the description. The tool counts unique hashtags and warns you if you go over the limit.
What should go in the first lines of my description?
Lead with your main topic and a short summary or call to action. Those lines are what many people see before clicking "Show more," and they often feed search snippets. Include your primary keyword naturally, not stuffed.
Is there a character limit?
YouTube descriptions can be up to 5,000 characters. The analyzer warns you if you exceed that limit.
How do chapter timestamps need to be formatted?
Use a line that starts with a timestamp like 0:00 Intro or 1:30 Main topic. Formats like 0:00:00 for longer videos are supported. The tool lists detected chapters so you can verify order and labels before publish.
What is keyword density and should I worry about it?
The tool shows which meaningful words appear most often (common words like "the" are ignored). Use it to confirm your topic words show up naturally — not to cram the same phrase dozens of times.
Too many links — is that a problem?
Lots of links can make the description hard to read. The tool lists and counts your URLs so you can keep the most important ones (website, related video, social) and trim the rest.
What are the key features of YouTube Description Optimizer & SEO Analyzer?
Top keyword overview
See which topic words repeat most, with density percentages, to balance SEO and natural writing.
Hashtag counter
See every hashtag and whether you are within YouTube's 15-hashtag limit.
Link inventory
Review all HTTP and HTTPS links in one list — useful for affiliate links, social profiles, and related videos.
Issue and suggestion list
Get plain-language fixes for empty descriptions, weak openings, missing chapters on long videos, and more.
Chapter line detection
Automatically finds timestamp lines so you can confirm chapters are formatted correctly for YouTube's chapter feature.
How do you use YouTube Description Optimizer & SEO Analyzer?
Paste your full description
Include everything you plan to publish: summary, links, hashtags, affiliate notes, and chapter timestamps.
Run the analysis
Review length, hashtags, chapters, links, and the keyword list in the results.
Apply fixes and re-check
Update your description based on suggestions, then run again until issues are resolved.
Description template that works for most videos
Line 1–2: What the video is about and who it is for. Line 3–5: Key takeaways or CTA (subscribe, download, visit site). Middle: chapters for videos over ~8 minutes, related links, credits, and social handles. End: 3–5 relevant hashtags, not 15 random tags.
Avoid common mistakes
Do not paste only hashtags or link spam at the top. Do not copy the same block to every video without tailoring the opening lines. Do not exceed 5,000 characters. Keep hashtag sets relevant to the specific video, not your entire channel niche.
Chapters help viewers and watch time
Chapters make long tutorials, podcasts, and reviews easier to navigate. Start with 0:00, keep labels short, and ensure timestamps increase in order. Viewers who find the section they need are more likely to stay and return.
Which AI tools pair with this YouTube workflow?
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