Ijharul Islam
To resize a video without cropping, change the frame to the platform's size (1080×1920 for Reels, TikTok and Shorts, 1080×1080, 1080×1350 or 1920×1080) and fill the empty space with a blurred copy of the video or bars. QuickVeed's free Video Resizer does this in your browser; FFmpeg's scale and pad filters do it too.
Resizing and cropping solve the same problem in opposite ways. Resizing keeps everything and adds a background; cropping cuts the edges to fill the screen. This guide shows how to do the first, and when the second is the better call.
The short answer
Open QuickVeed's free Video Resizer, pick a size such as 1080×1920 for Reels, TikTok and Shorts, choose Blurred background (or black bars), and click Resize and save. The whole picture stays visible in the middle. Use Fill or a cropper only when the subject sits in the centre and you're happy to lose the edges.
Key takeaways
- Resize when every part of the frame matters: slides, screen recordings, text, wide product shots.
- Crop when the subject is in the middle and filling the phone screen matters more than the edges.
- A blurred background looks more finished than black bars on social feeds.
- Resizing up doesn't add detail: a 720p clip at 1080×1920 is just bigger.
Disclosure: we make QuickVeed and show how to do this in it, along with other ways. Details about other products come from their public pages, checked in October 2026 and linked at the end.
Video sizes for each platform (checked October 2026)
The sizes below come from the platforms' own help and ads pages. Every platform accepts other shapes too, but these fill the screen or slot they're shown in:
| Where | Shape | Size to export | Source |
|---|---|---|---|
| Instagram Reels | 9:16 | 1080×1920 (Instagram accepts 1.91:1 to 9:16) | Instagram Help |
| TikTok | 9:16 | 1080×1920 | TikTok's ad specs |
| YouTube Shorts | 9:16 or 1:1 | 1080×1920 or 1080×1080 | YouTube Help: Shorts are square or vertical |
| Instagram and Facebook feed | 4:5 or 1:1 | 1080×1350 or 1080×1080 (Meta recommends 4:5 for Feed video ads) | Meta's Ads Guide |
| YouTube, LinkedIn, website | 16:9 | 1920×1080 | YouTube Help: 16:9 is the standard player |
Every platform in one table, with length and file limits, is in our free social media video size guide. For Reels detail, see Instagram Reels dimensions; for Shorts, YouTube Shorts size and length.
How to resize a video in your browser, without cropping
QuickVeed's Video Resizer is free, runs in your browser, never uploads your file and adds no watermark.
- Open the tool and drop a video your browser can play, up to 500 MB and 10 minutes.
- Pick the size: 1080×1920 (Reels, TikTok, Shorts), 1080×1080, 1080×1350, 1920×1080, 1280×720, 854×480, or a custom width and height from 16 to 3,840 pixels.
- Choose how to fit it: Blurred background puts a soft blurred copy of the video behind it, Black bars adds plain bars, and Fill scales it up to cover the frame (which crops the edges).
- Check the preview, then click Resize and save and download the new file.
The browser plays the video once and records the result, so saving takes about as long as the finished video. Keep the tab open and in front while it runs. The file is MP4 where your browser can record MP4 (Chrome, Edge and Safari can) and WebM otherwise; the result is re-encoded, so it isn't a bit-for-bit copy of the original.
Resize, crop or reframe: which to use
| Method | What happens | Use it when |
|---|---|---|
| Resize with blurred background | Whole frame kept, blurred copy fills the gaps | Slides, screen recordings, wide shots, anything with text near the edges |
| Resize with bars | Whole frame kept, plain bars | Professional or archival use where blur looks out of place |
| Fill or crop | Frame filled, edges cut off | One subject in the centre; you want full-screen impact |
| Reframe (follow the subject) | Crop that moves with the speaker | Interviews and podcasts where people move or there are two speakers |
A landscape video resized to 9:16 with a blurred background fills only about a third of the screen height with the actual picture. That's fine for a slide or a chart, but a talking head will look small. For people on camera, crop or reframe instead: see how to crop a video and how to turn horizontal video into vertical. For text and captions, remember the safe zones: on vertical video, keep key content out of the bottom third.
How to resize a video with FFmpeg
FFmpeg's scale filter changes the size and the pad filter adds bars; a blurred background combines the two with a blur:
| Goal | Command |
|---|---|
| Fit into 1080×1920 with black bars | ffmpeg -i in.mp4 -vf "scale=1080:1920:force_original_aspect_ratio=decrease,pad=1080:1920:(ow-iw)/2:(oh-ih)/2" -c:a copy out.mp4 |
| Fit into 1080×1920 with a blurred background | ffmpeg -i in.mp4 -filter_complex "[0:v]scale=1080:1920:force_original_aspect_ratio=increase,crop=1080:1920,boxblur=20[bg];[0:v]scale=1080:1920:force_original_aspect_ratio=decrease[fg];[bg][fg]overlay=(W-w)/2:(H-h)/2" -c:a copy out.mp4 |
| Square 1080×1080 with bars | ffmpeg -i in.mp4 -vf "scale=1080:1080:force_original_aspect_ratio=decrease,pad=1080:1080:(ow-iw)/2:(oh-ih)/2" -c:a copy out.mp4 |
| Just make it smaller, same shape | ffmpeg -i in.mp4 -vf scale=-2:720 -c:a copy out.mp4 |
force_original_aspect_ratio=decrease keeps the shape while fitting inside the frame; -2 keeps the width an even number, which most encoders require.
Common resizing mistakes
- Stretching. Forcing a 16:9 video into 9:16 without keeping the aspect ratio squashes everyone. Always fit, pad or crop; never just set both numbers.
- Upscaling for quality. Turning 720p into 1080p makes the file larger, not sharper. Export at the platform's size from the best source you have.
- Resizing the final version. If you'll need several shapes, resize the original once per shape, rather than resizing a resized copy.
- Ignoring file size. A larger frame means a larger file; if an upload is too big, use the free video compressor.
Need the exact pixel size for an unusual ratio? The free video aspect ratio calculator works out the missing side, rounded to even pixels.
Making one video for every platform
A practical routine for a business video: edit the master in 16:9 for YouTube and your website, then make a 9:16 version for Reels, TikTok and Shorts and a 4:5 version for feeds. Use the resizer with a blurred background for slide-heavy or product-wide content, and a crop for talking heads. Add captions to each version last, because their position depends on the shape: QuickVeed's auto subtitles burns captions at the bottom, middle or top. A transcript costs 1.5 credits a minute, rounded up, and a burned-in copy 1 credit a minute with a 3-credit minimum, so captions on a 1-minute clip cost 5 credits.
If you're starting from a product photo rather than a video, UGC video ads and the AI video generator make 9:16 clips from the start, so there's nothing to resize.
Frequently asked questions
How do I resize a video without cropping it?
Change the frame size and fill the empty space instead of cutting: in QuickVeed's free Video Resizer pick the size and choose Blurred background or Black bars. With FFmpeg, use scale with force_original_aspect_ratio=decrease and pad.
What size is a 9:16 video?
1080×1920 pixels is the standard. 720×1280 also works but is less sharp.
How do I fit a horizontal video on Instagram Reels without cropping?
Resize it to 1080×1920 with a blurred background so the whole picture sits in the middle. Instagram also accepts ratios down to 1.91:1, but a wide video then shows small with empty space.
What is the difference between resizing and cropping?
Resizing changes the frame and keeps the whole picture, adding a background where the shape differs. Cropping removes part of the picture to change the shape.
Does resizing a video reduce quality?
Making it smaller loses detail you weren't going to see at that size; re-encoding loses a little. Making it bigger can't add detail.
Can I resize a video on my phone?
QuickVeed's resizer runs in mobile browsers that can record video, but phones may struggle with long files. Most phone editors, including CapCut, have a canvas or ratio setting too.
Try it with your own video
Resize your video for free, then add captions in the right spot for each shape. Upload the resized video, pick a caption position and judge the result for yourself. QuickVeed plans start at $18/month, and new accounts get a 14-day trial with 75 credits, no card needed. Sign up or see pricing.
Sources
Competitor details in this post were checked against these public pages in October 2026. Products and prices change, so confirm with each vendor before you decide.
- Instagram Help: Reels resolution and size
- Meta Ads Guide: Instagram Reels video ads (safe zones)
- Meta Ads Guide: video ads on Facebook Feed (4:5 recommended)
- TikTok Ads Help: auction in-feed ads specs
- YouTube Help: YouTube Shorts up to three minutes, square or vertical
- YouTube Help: video resolution and aspect ratios
- FFmpeg filters documentation (concat, drawtext, reverse, areverse, pad, boxblur)
