The Aspect Ratio Cheat Sheet: Cropping Videos for Instagram, TikTok, and YouTube

When I first started posting videos across social media platforms, I made the same mistake over and over: I'd carefully edit a 16:9 video for YouTube, then just throw the same file at Instagram and hope for the best. The result was a tiny letterboxed clip floating in the middle of a square frame — amateur hour. It took me longer than I'd like to admit to realize that each platform expects a different shape, and cropping is the difference between looking polished and looking like you gave up.

Cropping a video isn't just about cutting off the edges. It's about deciding what the viewer sees and, more importantly, what they don't. A good crop directs attention, removes distractions, and fits the frame your audience is already looking at.

What Each Platform Actually Wants

The golden rule is simple: crop for the screen your viewer is using, not the one you edited on.

• Instagram Feed — square 1:1 is the classic option, but portrait 4:5 takes up more screen space and tends to perform better. If you're posting a landscape video to Instagram, crop it to at least 4:5 before uploading.
• Instagram Stories and Reels — these demand 9:16 portrait, full screen. No letterboxing allowed. A 16:9 video dropped into Stories gets pillarboxed on the sides and looks tiny.
• TikTok — also 9:16, but TikTok's interface overlays captions, profile info, and buttons in the bottom third. Crop your video so the most important content sits in the top two-thirds.
• YouTube — standard 16:9 landscape. If you're uploading a vertical video, YouTube will add giant pillars on either side. Better to crop to 16:9 or upload as a Short (which uses 9:16).
• Facebook Feed — 16:9 for landscape, but square 1:1 also works well since Facebook's autoplay preview often crops to square on desktop.

Using SaveVex's Crop Video Tool

The Crop Video tool gives you enough control to handle any of these scenarios without installing a thing.

Step 1: Upload

Drag your video onto the upload area or browse from your files. The tool accepts MP4, WebM, MOV, AVI, and MKV files up to 500 MB. Once loaded, you'll see a preview with basic file details — name, duration, and resolution.

Step 2: Define Your Crop

You can set the crop area several ways, and they all update the preview in real time:

• Drag directly on the preview — click and drag to draw a rectangle. The dimmed area outside your selection shows exactly what will be cut.
• Use aspect ratio presets — pick from Free, 1:1 (Instagram), 4:3, 16:9 (YouTube), 3:2, or 21:9 (cinematic). The crop rectangle locks to the chosen shape while you resize it.
• Center Crop button — instantly frames the largest possible rectangle at your chosen ratio, perfectly centered. Great for a fast start.
• Manual values — enter exact X, Y, width, and height for pixel-level precision.

A label on the overlay shows the output resolution, so there's no guesswork about what you'll get.

Step 3: Export

Hit "Crop Video," watch the progress bar, and when it's done you'll see a side-by-side comparison of the original and cropped versions. Download the result in MP4, MOV, AVI, or MKV.

Pro Tips for Better Crops

• Think vertical first — most social feeds are designed for portrait scrolling. Start with a 9:16 crop and scale down to square or landscape from there if needed. It's easier to remove vertical space than to add it.
• Account for platform UI overlay — Instagram Reels and TikTok overlay captions, buttons, and handle names on the bottom third of your video. Crop with that buffer zone in mind so nothing important gets hidden.
• Center crop is your starting line, not your finish line — it gets you 80% of the way, but nudging the frame by even a few pixels can dramatically improve your composition.
• Keep the subject's eyes in the top third — especially for interview-style or face-forward content, this aligns with the rule of thirds and keeps your subject's expression visible even when platform UI covers the bottom.
• Preview on an actual phone before committing — what looks perfectly framed on your 27-inch monitor can feel claustrophobic on a 6-inch screen. A quick phone check saves you from uploading something that looks wrong.

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Why SaveVex?

There's no software to download and no account to create. Your video never leaves your device — all the processing happens locally in your browser. It's completely free, completely private, and works on any modern browser.

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Ready to get your video dimensions right? Try the Crop Video tool now — free, instant, and private.