How to use the YouTube Tag Checker
- Paste your tags. Separate them with commas or new lines. Copy them from YouTube Studio or from your notes.
- Enter your main keyword and title. The keyword check looks for the exact phrase as a tag and for the individual words. The title check finds tags that only repeat the title.
- Read the budget and duplicates. Commas count toward 500, and a tag with a space counts two extra for the quote marks YouTube adds. Exact and near duplicates are listed.
- Copy the cleaned list. Use the cleaned list, which drops quotes and duplicates and stays inside the budget, or the suggested order with the main keyword first.
How the YouTube tag checker works
What it checks
The total tag budget with commas and the quote-mark rule, the longest tag, exact duplicates ignoring case, near duplicates, tags that repeat the title, quoted multi-word tags, the number of tags, coverage of your main keyword, and a suggested order.
Your tags stay in your browser. Nothing is uploaded.
Rules and sources
Per the YouTube Data API reference for the videos resource, checked October 2026: the tags list has a maximum length of 500 characters, commas between items count, and a tag with a space is treated as if wrapped in quotation marks that also count.
Per YouTube's help page "Add tags to your YouTube videos", checked October 2026: tags can be useful if the content is commonly misspelled, otherwise they play a minimal role in discovery, and excessive tags break the spam policy.
Order, plural handling and the long-list warning are our editing suggestions. YouTube does not publish them as rules.
Limitations
Plural matching only strips a trailing s or turns ies into y, so it will miss irregular plurals. The tool cannot see your video, so it cannot say whether a tag is accurate. For titles, descriptions, chapters and hashtags, use the YouTube Title and Description Checker.
Frequently asked questions
How many characters can YouTube tags use?
500 in total, per the snippet.tags entry in the YouTube Data API reference for videos (checked October 2026). Commas between tags count. A tag containing a space is handled as if wrapped in quote marks and the quote marks count too, so "Foo Baz" costs 9 while Foo-Baz costs 7. The tool does this sum for you.
Do YouTube tags still matter for ranking?
Only a little. YouTube's own help page on tags says they can be useful if your video's topic is commonly misspelled, and otherwise play a minimal role in discovery, with the title, thumbnail and description being more important. It also warns that adding excessive tags is against its spam policy. Use this tool to keep the list short and clean, not as a ranking tactic.
How many tags should I use?
YouTube gives no target number. A handful that describe the video and its common misspellings is enough. The 500 character budget is a ceiling, not a goal, and the tool warns when a list gets long.
Do I need quote marks around multi-word tags?
No. In YouTube Studio you type the phrase and press comma or Enter. The API adds the quote marks itself when it counts, which is why a phrase tag costs two extra characters. The cleaned list removes typed quotes.
Are "recipe" and "recipes" two different tags?
You would spend budget twice for almost no gain. The tool flags tags that differ only by case, a plural s, spacing or a hyphen as near duplicates and keeps the first one.
Should my first tag be the main keyword?
It is a sensible habit. YouTube does not say order matters, so this is an editing suggestion, not a rule. The tool puts the exact keyword first and then the most specific tags, those with more words.