YouTube Hashtags and Chapters: Rules, Limits and Data

People search for YouTube hashtags to learn how many to use, which to pick, and whether they do anything. YouTube's help pages answer the first question and part of the third. This guide sets out what they say, adds our own count of what real videos do, and covers chapters, which follow rules just as easy to break.

The hashtag rules

These come from YouTube Help's hashtag page.

• You can add hashtags to a title and a description when you upload a video. Hashtags in either one link to a results page of other videos that share the hashtag.
• "Out of all the hashtags you add to the video's description, up to three hashtags that are considered most engaging will appear by your video title."
• "If a video or playlist has more than 60 hashtags, we'll ignore each hashtag on that content."
• Hashtags cannot contain spaces. Two words can be joined into one, such as #TwoWords.
• "The more tags you add, the less relevant they become for viewers or listeners who are searching."
• Hashtags that are not directly related to the video are not allowed, and YouTube Help says misleading or unrelated ones may lead to the video being removed.

You will see other limits quoted on other sites, such as 15 or 30. The only number on YouTube Help's page is 60, so that is the one this guide uses.

What real videos do with hashtags

We counted how far practice sits from those rules. On 25 September 2026 we read two samples through the YouTube Data API. The first is the most-popular chart for 12 regions (US, GB, IN, BR, DE, FR, JP, KR, MX, CA, AU, ES), 50 videos each, which gave 446 different videos. The second is the latest 50 uploads of channels drawn at random, with a fixed seed, from that first sample: 59 channels returned data, giving 2,796 videos with a known length. A hashtag is counted by the extractor's rule: a "#" followed by letters, numbers or underscores, with at least one letter, in the title or description.

Roughly half of all videos skip hashtags. Among those that use them, the typical count is three, the number YouTube shows above the title. Yet close to half of the users add more, and per YouTube Help those extras cannot appear above the title, though they still link to a results page.

Shorts differ. The uploads sample has 528 of them: 68.2% use hashtags, against 45.1% of longer videos, and 46.2% put one in the title, against 4.2%. The typical count is 4.

Both samples lean toward large channels, because the chart and the channels drawn from it are popular by construction, and the chart sample has only 6 Shorts. These counts show what creators do. They say nothing about what works.

Do hashtags work, and how many should you use?

We found no statement on YouTube Help's hashtag page that hashtags raise views or ranking, and our counts cannot show it either, since we did not measure results. What the help pages do say is narrower. On its page about adding tags, YouTube Help says a video's title, thumbnail and description are more important pieces of metadata for discovery, and that tags, the hidden kind, can be useful if the content of a video is commonly misspelled. That page does not compare hashtags with tags.

Our practical reading, which is not YouTube's: pick up to three hashtags that name the topic in words a viewer would search, put them at the end of the description, and stop. YouTube chooses which three show, so a longer list gives you less control, and the page itself warns that more tags dilute relevance.

Hashtags for Shorts

YouTube Help says that when you add text to a Short and begin typing a hashtag, YouTube shows suggestions to help you apply relevant ones. The page does not say how many show on a Short or where, so we make no claim about that.

Is there a hashtag generator here?

No. The extractor reads a live video. It does not invent hashtags, and it does not use AI to suggest them. The page we read from YouTube Help publishes no list of top or trending hashtags either.

For research, the tool can show which hashtags videos already doing well in your topic use. Paste a few in and look. You learn what those creators tried, not what made their videos perform.

Chapter rules

These come from YouTube Help's chapters page.

• The first timestamp you list must start with 00:00.
• The video should have at least three timestamps, in ascending order.
• The minimum length of a chapter is 10 seconds.
• YouTube can also generate chapters automatically. The box is checked by default for new uploads, and you can switch it off for one video or in your upload defaults. Not all videos are eligible: YouTube Help says automatic chapters are unavailable if the channel has active strikes or the content may be inappropriate to some viewers.

What real videos do with chapters

Using the same two samples, we looked for description lines that start with a timestamp and checked them against the three rules.

None of the 1,234 videos under 5 minutes in the two samples had timestamp lines. Among the 91 long videos in the uploads sample whose descriptions had them, 38 passed. Of the 53 that did not, 44 started somewhere other than 0:00 and 41 had fewer than three. A description can fail both ways.

Read this with care. A line that starts with a time is not always meant as a chapter, so some failures are probably not chapters at all. The API cannot show automatic chapters, so a video without a list may still have them in the player.

What the extractor does

Paste a video link or ID. The tool reads the title and description from the YouTube Data API, at one unit of quota, and parses them on our side. It guesses nothing from the audio or the comments.

For hashtags, it lists what it finds, highlights the ones likely to appear above the title, and warns if a video has more than 60. The top-three highlight is a best-effort rule, because YouTube says it picks the most engaging.

For chapters, it lists the description lines that start with a timestamp, such as "0:00 Intro", and names the rule a line breaks: a first chapter not at 0:00, fewer than three chapters, a time not later than the one before it, a chapter under 10 seconds, or one that starts after the video ends.

Here is an invented example. A description ends with six hashtags and a list of chapters at 0:05, 1:30 and 2:10. The tool marks the first three hashtags as the likely ones above the title, and flags that the first chapter is at 0:05 and not 0:00. Fix that one line, paste the description again, and the list passes.

1. 01

   Paste a video link into the extractor

   It works with a video link, a youtu.be link, a Shorts link or an 11-character ID.

2. 02

   Look at the hashtags

   Check which ones the tool marks as likely to appear above the title, and whether the count is anywhere near 60.

3. 03

   Look at the chapters

   If the list is flagged, fix the line it names and paste the description again.

4. 04

   Confirm on YouTube

   Passing the check means the list follows the rules. YouTube decides what it shows.

FAQ

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