For an Instagram Reel aspect ratio that fills a vertical screen, set the project to 9:16 before you edit clips, captions, or cover art. Instagram accepts Reels from 1.91:1 through 9:16 and specifies a minimum 720-pixel resolution and 30 FPS frame rate. A 9:16 project gives the clearest starting point for a full-screen Reel and makes the final crop easier to review. Check Instagram's current Reels requirements before delivery.
This guide focuses on the last editorial pass: canvas, safe composition, cover choice, and a file check. Build the story, correct captions, and balance audio before starting this delivery brief.
Start with a Reels delivery brief
Write the destination brief before opening export settings. It prevents a late resize from changing the crop or squeezing caption lines.
The brief is a review tool, not a preset. It keeps the project focused on the way viewers will encounter the Reel.
Use one source clip to test the brief before reviewing the full project:
Set the Instagram Reel aspect ratio before editing
Choose the Instagram Reel aspect ratio at the project stage, then check the first, middle, and last scene in the vertical frame. Reframe each scene instead of relying on a final crop to rescue a wide or square source.
Start with the opening frame. It should show the main subject or action without placing it against an edge. Then inspect the longest caption and the last frame. These checkpoints reveal whether the composition still reads when the video is viewed vertically.
If one source clip is horizontal, decide what the vertical viewer should see first: the speaker, product, demonstration, or a single visual detail. Resize or reposition that scene in the project before export. This preserves a deliberate composition rather than producing a narrow crop by accident.
Protect the important part of the frame
A reels aspect ratio changes where interface elements, captions, and a viewer's attention sit around the picture. Keep the subject and essential text away from the outer edges. Use a short caption line when possible, then review it against motion rather than treating the text as a separate layer.
Check these three areas:
- 1
- Opening frame: the subject, headline, or first action is immediately clear. 2
- Caption area: text remains readable through scene cuts and does not cover the key visual detail. 3
- Ending frame: the final message or action still reads after the last movement stops.
For a title card, use fewer words and a strong contrast between text and background. For a product or tutorial scene, leave room around the item or on-screen step so the frame does not feel crowded.
Match the file review to the vertical composition
Your instagram video aspect ratio is only one part of the delivery check. Before saving the final file, preview the complete project at the vertical frame shape and confirm that the opening, one detailed middle scene, and the ending each match the brief.
CapCut's online editor documents filename and resolution controls alongside advanced options for quality, frame rate, and format. Use the export step to compare the delivery brief with the file you are preparing, then keep the frame rate at or above Instagram's published minimum. Do not use a larger output setting to repair a clipped caption or an off-center subject; correct the project composition first.
Use a cover that supports the Reel
The Reels cover is a separate decision from the moving first frame. Instagram recommends a 420 by 654 pixel cover and notes that the cover cannot be edited after upload. Choose a frame or prepared cover image that names the topic clearly, shows the subject at a useful scale, and remains legible in a profile grid.
Review the cover beside the opening seconds of the Reel. They should feel like the same video, even when the cover uses a simpler composition. If the opening depends on small text or a fast camera move, select a clearer cover rather than trying to squeeze the entire opening frame into the grid.
Run a final delivery check
Before sharing, play the saved video from start to finish and compare it with the brief.
Fix the smallest source of the mismatch. Reposition a clip for a crop problem, rewrite a crowded caption, or choose a clearer cover. Re-export only after the project itself matches the delivery brief.
When your Reels delivery brief is ready, continue with the CapCut AI video generator page to create or refine the next video. For the surrounding steps from input through delivery, use the AI video workflow map.