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The multi-platform dimension problem
Every social platform has preferred video dimensions. Instagram feed wants 4:5. Stories and Reels want 9:16. YouTube wants 16:9. LinkedIn accepts multiple formats but performs best at specific sizes. Twitter has its own preferences.
Posting the wrong dimensions means your video either gets letterboxed (black bars), cropped automatically by the platform (often cutting off important content), or displayed at suboptimal size.
Getting dimensions right is one of the simplest ways to look more professional on every platform.
Platform dimension reference
Feed post (square): 1080x1080 (1:1). Still works but takes less screen space than 4:5.
Feed post (portrait): 1080x1350 (4:5). Takes maximum feed space. Recommended for most feed content.
Reels/Stories: 1080x1920 (9:16). Full vertical. Required for Reels and Stories.
Landscape: 1080x608 (16:9). Acceptable but takes minimal screen space. Avoid for engagement-focused content.
TikTok
Standard: 1080x1920 (9:16). Vertical is the only option that looks native.
YouTube
Standard video: 1920x1080 (16:9). The default and expected format.
Shorts: 1080x1920 (9:16). YouTube's vertical format.
4K: 3840x2160 (16:9). For creators with 4K content and audience with 4K screens.
Feed: 1920x1080 (16:9) or 1080x1080 (1:1). Both work well. Horizontal tends to perform slightly better.
Vertical: 1080x1920 (9:16). LinkedIn now supports vertical video in the feed.
Twitter/X
Standard: 1920x1080 (16:9) or 1280x720.
Vertical: 1080x1920 (9:16) supported but 16:9 remains most common.
Resizing with full control
When you want to control exactly how the video sits in a new shape — rather than letting an algorithm decide — the canvas editor is the tool. You upload your video and pick a target shape from presets (1:1 square, 4:5 Instagram, 9:16 vertical, 16:9 landscape) or enter custom dimensions, then position the video within that canvas. You can fill the canvas by cropping to fit, fit the whole video inside it with a background filling the gaps, or place and scale it manually. When the video doesn't fill the frame, you decide what goes behind it: a solid color, a gradient, or — a popular choice for putting vertical video on a horizontal canvas — a blurred copy of the video itself. Then export at your chosen dimensions, ready to upload.
That background control also enables a look that reads as distinctly modern: video with rounded corners floating on a colored background, rather than running edge to edge. The canvas editor handles it natively — set a canvas color, round the video's corners — and the result feels designed rather than just posted.
One source, every platform
The efficient way to handle all of this is to produce once and adapt. Film and edit at the highest resolution you can, ideally 4K 16:9, and export a master. From there, use the canvas editor for platform-specific sizing and backgrounds, auto reframe when you need an intelligent vertical crop that tracks the subject rather than a fixed-center one, captions sized for each platform's viewing context, and a consistent color grade across every version so they read as one body of work. One editing session then feeds every platform, and each platform version takes only five to ten minutes.
The mistakes that undercut the effort
A few habits quietly hurt. Relying on a platform's auto-crop hands the framing to an algorithm that usually crops dead center, often slicing off something important at the edge. Posting the same horizontal file everywhere — a 16:9 YouTube cut dropped onto TikTok untouched — looks lazy and performs accordingly. Ignoring safe zones lets the platform's own interface cover your content. Uploading below a platform's supported resolution (720p where 1080p is accepted) looks visibly soft. And inconsistent dimensions across posts make a profile grid look messy where uniform sizing looks intentional.
Safe zones are worth memorizing because they're invisible until they bite. On TikTok, keep text and key elements clear of roughly the top 150px (the username area) and the bottom 250px (caption and music). Instagram Reels is similar — avoid about the bottom 200px and top 100px. YouTube Shorts covers roughly the bottom 100px with the title and description, so keep content centered vertically. And on every platform, the only reliable check is to preview the actual post in the app before publishing, since that's the one view that shows you what the UI will cover. For most creators the whole per-platform pass is just the canvas editor for size and background, film filters for color, captions for text, and export.
Related: Auto reframe for TikTok | How to add captions to YouTube Shorts
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