Reel & Shorts Size Resizer
Crop any video to the exact Instagram Reels, YouTube Shorts or Stories size — 9:16, 16:9 or 1:1 — right in your browser.
About the Reel & Shorts Size Resizer
Every short-form platform wants a different shape. A landscape video shot for YouTube looks cropped or letterboxed if you upload it straight to Reels; a vertical phone video looks tiny with big black bars if you upload it to standard YouTube. This tool re-crops your video to the exact frame each destination expects, using preset ratios matched to real 2026 platform specs.
Choose 9:16 for Instagram Reels, Instagram/Facebook Stories, or YouTube Shorts — all three use the same vertical shape. Choose 16:9 for a standard landscape YouTube upload or a widescreen destination. Choose 1:1 square for feed-style placements that still favor a square crop. The crop happens locally in your browser with ffmpeg.wasm, so you can try a couple of presets back-to-back without re-uploading anything.
Related reading: Instagram Reels ideal size & resolution · YouTube Shorts vs Reels vs TikTok specs
Use it in 3 steps
No upload wait · No account · No app install.
Upload your video
Choose the source clip — landscape, portrait or square, any starting shape works.
Pick a size preset
Instagram Reels/Stories & YouTube Shorts (9:16), YouTube standard/landscape (16:9), or Square (1:1) — matched to actual platform specs.
Download the resized video
We crop to fill the target frame (no black bars) and export it ready to upload.
Frequently Asked Questions
Everything people ask before they download.
What size should a Reel or Short actually be?
Instagram Reels and Stories, and YouTube Shorts, are all built around a 9:16 vertical frame — the reference resolution most creators target is 1080×1920px. This tool crops your source video to exactly that ratio.
What does "crop to fill" mean here?
Instead of adding black bars (letterboxing) to fit your video into the new shape, we scale it up and crop the edges so the target frame is filled completely — this is how most Reels/Shorts look natively. The trade-off is that the far left/right (or top/bottom) of your original frame gets cut off.
Can I choose which part of the frame stays visible?
The current version center-crops — it keeps the middle of your frame and trims evenly from both sides. If your subject is off-center, trim or reframe the source clip first so the important part sits in the middle.
Does resizing reduce video quality?
The crop and scale is a re-encode step, so there is some quality change versus a byte-for-byte original, similar to what happens on any platform upload. We use a high-quality scaling filter to minimize visible loss.
What's the difference between 16:9 and 9:16?
16:9 is the standard widescreen/landscape shape (regular YouTube videos, most TVs). 9:16 is that same ratio rotated — the vertical shape used by Reels, Shorts and Stories. 1:1 is a perfect square, still used on some feed placements.
Should I resize or compress first?
Resize first if you're changing shape, then compress if the file is still too large — that order avoids re-encoding twice on the same steps unnecessarily. Our Video Compressor picks up right where this tool leaves off.