TikTok video width and height: 1080x1920, and how to export it

The width and height guides give for a TikTok video is 1080x1920 pixels at a 9:16 ratio, MP4. I could not retrieve TikTok's own help page when I tried on 2026-10-05, so treat that number as a third-party consensus, not a quote from TikTok. The two guides I read, Reap and Headliner, both list 9:16 and 1080x1920 as the core spec for Shorts, Reels and TikTok, and neither is a platform page.

What the guides say, and what they leave open

The guides agree on shape and disagree on length. That is why a file spec and a length limit should be handled separately: the shape is a property of the pixels you export, the length is a property of the cut.

Route 1: you have a horizontal or square clip

Crop to a 9:16 window with video filter, then scale in the same request. For a 1920x1080 source the crop is width 0.3164, height 1, x 0.3418, and the filtergraph is scale=1080:1920,setsar=1. Run it through POST /v1/video-filter/check first: the check is free, creates no job, and returns the compiled filters and an estimate.

Every Sume media tool except captions takes a media.sume.com URL that your workspace already owns, so import the clip first with POST /v1/media-imports and send an Idempotency-Key on writes.

curl -X POST https://api.sume.com/v1/video-filter/check \
  -H "Authorization: Bearer $SUME_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "video_url": "https://media.sume.com/artifacts/artf_demo/clip.mp4",
    "ops": [{"op":"crop","x":0.3418,"y":0,"width":0.3164,"height":1}],
    "filtergraph": "scale=1080:1920,setsar=1"
  }'

Route 2: you are assembling a new video

Timeline 1.0 renders 1080x1920 MP4 by default, so for a sequence of clips you set nothing. Set output.width and output.height only for another size (even integers from 256 to 2160), and leave output.fps out so the render follows the sources. The public rate is $0.10 per started output minute; confirm it in GET /v1/catalog.

Verify before you upload

Run video inspect with "frames": false on the result. That returns only the probe, with no stills, so you can compare the real dimensions and duration against your target. If the file is longer than the length you plan to post, cut it with video trim before the upload.

Crop fractions for common source shapes

If your source is not 9:16, the crop numbers depend only on its ratio. These are the full-height window widths; the posts linked below work each one through with pixel results: 16:9 center crop, 3:2, 4:3 and square.

Vendor facts should come from the vendor. TikTok's own help pages are the right place to confirm dimensions, and a number in a third-party guide can lag a change by months. Treat 1080x1920 as the shape most guides agree on and a safe default, and check a current TikTok page before you commit a large batch. Nothing in the Sume pipeline above depends on the exact figure: if a platform wants a different size, change the scale values or the Timeline output block and re-run.

For a batch, write the crop numbers into a small table in your script, key them by source ratio, and run the free check on one sample file of each shape before the full batch. That catches a bad fraction once, not a hundred times, and it costs nothing because the check creates no job.

• 16:9: width 0.3164, x 0.3418.
• 3:2: width 0.375, x 0.3125.
• 4:3: width 0.4219, x 0.2891.
• 1:1: width 0.5625, x 0.2188.
• Already 9:16 but not 1080x1920: skip the crop and send only scale=1080:1920,setsar=1.