How to use it
- 1Choose the platform
TikTok, YouTube Shorts, or Both to see the area that is safe on each.
- 2Add a frame
Choose or drag in an image or video. It is drawn in your browser on a 1080 × 1920 frame; nothing is uploaded.
- 3Move anything in the shading
Text, faces or logos inside the shaded areas can be hidden by buttons, captions or the account name. Download the overlay to share it.
Safe zone margins used by this tool
| On a 1080 × 1920 frame | Top | Bottom | Left | Right |
|---|---|---|---|---|
| TikTok | 240 px | 660 px | 120 px | 120 px |
| YouTube Shorts | 288 px | 672 px | 48 px | 192 px |
| Both platforms | 288 px | 672 px | 120 px | 192 px |
Approximate, measured on 15 October 2026 from TikTok’s In-Feed ad template and Google’s universal safe zones for YouTube video ads. TikTok also covers an action column from 780 px across and 840 px down, which the TikTok and Both overlays shade.
Caption and description limits
| Field | Limit | Source |
|---|---|---|
| TikTok video caption | 2,200 UTF-16 characters | TikTok Content Posting API |
| TikTok photo-post title | 90 UTF-16 characters | TikTok Content Posting API |
| TikTok photo-post description | 4,000 UTF-16 characters | TikTok Content Posting API |
| YouTube title | 100 characters | YouTube Data API |
| YouTube description | 5,000 bytes | YouTube Data API |
Checked against the sources on 15 October 2026. These are the limits the platforms publish for their developer interfaces; limits shown inside an app can differ.
Where do TikTok and Shorts cover your video?
On TikTok, the account name, caption and sound label sit across the bottom left, and the like, comment, share and profile buttons run down the right edge. That is why the bottom and right margins are large, with an extra notch on the lower right.
YouTube Shorts puts its title, channel and subscribe button along the bottom and its action buttons on the right, so the right margin is wider than the left.
Are these margins official?
No. Neither TikTok nor YouTube publishes safe zones for organic posts. These margins are measured from the platforms’ published ad safe-zone templates, which are made for ads; organic posts are laid out similarly. Interfaces vary by device and change with app updates, so preview before posting.
FAQ
Is my image or video uploaded anywhere?
No. The file is read by your browser and drawn on this page. Nothing is sent to a server and nothing is stored.
Do hashtags count toward the caption limit?
Yes. Hashtags and mentions are part of the caption text, so they use up the same limit. The counter includes them.
My video is not 9:16. What happens?
The tool measures a 1080 × 1920 (9:16) frame. A different shape is fitted inside it without cropping, so you will see bars.
Does AutoGenShorts keep captions inside the safe zone?
Yes. AutoGenShorts burns captions in, timed to the narration, positioned for vertical video, so they are not hidden by the app interface.