How to Resize & Crop Videos for Instagram Reels

Why cropping matters for reels

Instagram Reels, TikTok, and YouTube Shorts all display vertical full-screen video. If you shoot in landscape 16:9 — the default on most cameras and screen recordings — platforms either letterbox your footage with black bars or aggressively center-crop it without your control. That means faces get cut off, text overlays land in the wrong place, and your composition looks amateurish compared to creators who frame intentionally.

Cropping before you publish gives you control. You decide what stays in frame, where the subject sits vertically, and how much headroom to leave for platform UI elements. A deliberate 9:16 crop signals quality to viewers and to the algorithm: watch time tends to improve when the subject is large, centered, and free of distracting empty space.

Reels Editor handles cropping entirely in the browser. Your video file stays on your device while you drag the frame, preview the result, and export MP4. There is no cloud upload step, which makes the workflow fast and private — especially when you are editing client footage or unreleased content.

Choosing the right aspect ratio

For full-screen vertical content, 9:16 is the standard. At 1080p that means 1080 pixels wide by 1920 pixels tall. Reels Editor defaults to 540×960, which is exactly 9:16 at half resolution — a practical balance between export speed and visual quality for mobile viewing.

If you are preparing a feed preview or a carousel thumbnail, 4:5 (1080×1350) is sometimes used on Instagram. Reels Editor lets you enter custom width and height, so you are not locked to presets. For TikTok and YouTube Shorts, stick with 9:16 for the main post.

Square 1:1 video still appears on some surfaces but performs worse for immersive short-form content. Unless you have a specific creative reason, vertical 9:16 should be your default for reels and shorts in 2026.

Safe margins and platform UI

Mobile platforms overlay interface elements on top of your video. Instagram places the caption, username, and audio label along the bottom. TikTok stacks engagement buttons on the right edge. YouTube Shorts adds title and subscribe prompts. If your subject or on-screen text sits in these zones, it will be partially hidden.

A practical rule: keep faces and key subjects in the center 80% of the frame. Leave extra padding at the bottom third for captions you add inside Instagram or TikTok after export. Leave a small margin at the top for status bars and navigation overlays on some devices.

When you crop in Reels Editor, use the live preview as if it were a phone screen. Ask yourself: would anything important be covered by a caption bar or a like button? Adjust the drag position until the answer is no.

Step-by-step: crop in Reels Editor

Open Resize Video from the main navigation or go directly to /resize-video. Upload MP4, MOV, or even a still image. The editor accepts files from phones, DSLRs, or screen recordings in supported formats.

Set output dimensions. For reels, enter 540 width and 960 height, or scale up proportionally if you need higher resolution. Drag the video within the crop frame until your subject is centered. Use the scale slider if you need to zoom into a landscape clip and discard the sides.

If your source is very wide, enable the background option. Reels Editor can fill the empty vertical space with a blurred version of your video or a custom background image — a common technique for podcast clips and screen recordings that keeps the frame full without stretching.

Preview carefully. Play through at least one full loop. Check that movement near the edges does not get clipped unexpectedly. When satisfied, click Download to save your cropped MP4 locally.

Common cropping mistakes to avoid

Cropping too tight on talking-head videos leaves no room for captions. Viewers on mute rely on text; if the platform caption overlaps the speaker chin or lower third graphics, readability suffers. Leave breathing room below the face.

Ignoring the opening frame is another frequent error. The thumbnail Instagram or TikTok shows often comes from the first second. Crop so the first frame is visually strong — not a half-transition or a blink.

Exporting landscape and letting the platform auto-crop is the worst option. Algorithms choose the geometric center, not the speaker. You lose control and often lose the shot. Always crop yourself before upload.

Finally, do not upscale low-resolution sources aggressively. Cropping a 720p wide video and blowing it to 1080×1920 cannot invent detail. Start with the highest quality source available.

Workflow tips for batch creators

If you publish multiple reels per week, standardize your crop dimensions and save them as a mental preset. Same width, same height, same bottom margin every time — your feed will look cohesive.

Crop first, then trim. Vertical framing changes how pacing feels; a cut that worked in landscape may feel slow once the subject fills the screen. Use the Cuts editor after cropping to tighten openings and remove dead air.

After cropping, add your logo with the Logo Editor so branding stays consistent across the feed. Finish with the Audio Processor if you need to replace or mute original sound before adding platform music.

Read our comparison of crop sizes in the blog post on best crop sizes for reels and shorts for additional format guidance and examples.