For a vertical TikTok edit, start with a 9:16 canvas. A practical export target is 1080 by 1920 pixels. Then check where the subject and text sit inside that frame: a file can have the right dimensions while still cutting off an important object or covering it with a caption.
Check TikTok video size in three separate passes: canvas shape, content placement and the exported file. Use the same short section for each check so you can see what your changes actually do.
Separate the canvas from the picture inside it
The canvas is the outer shape of the finished video. The source clip is the picture you place inside it. Changing the canvas to vertical does not turn a wide shot into a well-composed close-up.
TikTok's organic content guidance recommends a full-screen 9:16 composition. For this workflow, use 1080 by 1920 pixels as your chosen delivery size. Treat that as an editing target rather than a universal upload limit for every TikTok posting surface.
For example, 720 by 1280 and 1080 by 1920 are both 9:16. They have the same shape but different pixel counts. Increasing the export dimensions also does not restore detail that was missing from the source.
Start with the details the viewer must see
Before resizing, play the source clip once and name the information that has to survive. In a plant-watering shot, that might be the can, its spout, the pot and the point where the water reaches the soil. A close-up that loses the connection between those objects can make the action harder to follow.
For a person speaking, preserve the face and any hand movement needed to understand the explanation. For a screen recording, preserve the control being used and the result. Decide this before enlarging the picture to fill a tall frame.
Keep an untouched copy of the source. Use the same beginning and end points for your framing comparisons, including a moment when the subject moves near an edge.
Set the vertical canvas in CapCut Web
Open a video project and import your source clip through Media. Add it to the timeline, then open the aspect-ratio control beside the preview and choose 9:16.
Look at the preview before making another change. When a landscape clip is fitted inside a portrait canvas, the whole scene can remain visible with space above and below. Enlarging it uses more of the canvas but can remove the left and right sides of the original shot.
Choose the framing that preserves the explanation:
- Keep the full scene when the relationship between objects matters more than their size.
- Enlarge and reposition the picture when one subject carries the message and the crop preserves the complete action.
- Use the space around a fitted clip for a short heading when a tighter crop would remove useful information.
Check vertical source clips too. A clip can already be 9:16 and still place a face, label or important gesture too close to an edge. Its shape alone does not settle its composition.
We also re-imported the 9:16 export from this example as a vertical source in a separate CapCut project. The new project opened with a 16:9 canvas. After choosing 9:16, the full portrait picture fitted without another crop. Check the project canvas even when the source file is already vertical.
Compare two placements of the same clip
Make two versions of one short section. Keep the source, duration and canvas size the same. Change the picture position and the location of a short text line, then watch both versions at normal speed.
For the watering example, use the words "Water slowly". In one version, try the text near the picture. In the other, move it into the open area above the action. Select the text and drag it to change its position; select the picture separately to move the scene. Ask whether you can read the words without losing sight of the can's spout or the pot.
In our five-second CapCut example, both versions preserve the whole landscape picture inside the same 9:16 canvas. Version A places the two-line heading over the fern. Version B moves the heading into the upper space and the picture slightly lower, separating the words from the plant.
The heading appears during the opening part of this example and is gone by the four-second check in both exports. Check the text clip's duration as well as its position: extend it along the timeline when the instruction needs to stay visible longer.
Do not choose a version just because it fills more space. Choose the version that makes the action and the words easier to understand together.
Use a short, high-contrast line rather than shrinking a long sentence to fit. If a heading covers the action, move it or shorten it before reducing its size.
Review placement in the TikTok preview
After exporting, open the video in the TikTok posting preview and inspect it with the description and other elements you plan to use. Keep it as a draft while you make changes.
Look specifically at the right side and lower part of the picture, where interface elements can compete with your content. Move essential text toward a clearer part of the frame when it clashes with those elements. Check the whole sentence, including its last line.
Use the actual preview to judge placement rather than copying one fixed pixel safe zone onto every video. A clear editing preview and a clear posting preview are separate checks.
Export a short test before the full video
In CapCut Web, choose Export and then Download. Set a recognizable file name, choose 1080p and MP4, and select the frame rate you intend to deliver. Export the short section first.
Open the downloaded file and check its properties for width and height. For the 9:16 target used here, confirm 1080 by 1920. Then play it at phone size: check the picture, every line of text, the busiest movement and the ending.
If the dimensions are wrong, return to the canvas and export settings. If the dimensions are right but the action is cut off, return to the clip's framing. If the words are hard to read, fix their size, contrast or position. Each problem needs its own adjustment.
Once the short test works, apply the same decisions across the full edit and inspect shots with different source proportions. For your next project, the AI video creation guides can help you plan the material before editing. To create a new source shot from a brief, start with the CapCut AI video generator, then check its composition before adding text.
Frequently asked questions
What TikTok video size should I use for a vertical edit?
Use a 9:16 canvas. A practical target for this workflow is 1080 by 1920 pixels. Check the picture and text in the posting preview, as well as the exported file's dimensions.
Can I use a landscape clip in a vertical video?
Yes. Fit the whole picture inside the vertical canvas when you need its full width, or enlarge and reposition it when a closer view preserves the action. Compare both choices before committing to a crop.
Why does my video still look wrong at 1080 by 1920?
Those dimensions describe the outer frame. The source may be poorly positioned inside it, the text may cover an important detail, or the source may lack detail. Inspect those problems separately instead of exporting at a larger size again.
Is there one safe zone that works for every TikTok video?
Use the actual posting preview to check essential details and text with your planned description and other elements. Adjust anything that competes with the interface instead of relying on one fixed set of pixel margins.