Why you need to know the tag limit

Tags help viewers and the algorithm find your video.

YouTube checks the total characters in all tags.

Go over the limit and tags get cut or ignored.

How many tags you can use

YouTube does not limit the number of tags by count.

It limits the total tag characters to 400.

That means all tags added must fit in 400 characters.

Shorter tags help you include more and stay under the limit.

Tips for picking good tags

• Research keywords that match your video topic
• Mix broad and specific tags
• Use single words and short phrases
• Avoid repeating the same tag
• Keep it relevant to your content

How to add tags in YouTube Studio and via API

To add tags in Studio:

1. Open YouTube Studio and pick your video.
2. Go to the Details tab.
3. Find the Tags section and type your tags.
4. Save or update the video.

To add tags via the Data API, use this JSON payload:

{
  "id": "VIDEO_ID",
  "snippet": {
    "tags": ["travel", "vlog", "adventure"]
  }
}

Ensure you replace VIDEO_ID and include your tags list.