What's the most common video aspect ratio?

16:9 for widescreen, and 9:16 for vertical social video.

Is 1080p always 16:9?

1920×1080 is 16:9. Vertical 1080×1920 is 9:16.

What ratio should Instagram videos be?

9:16 for Reels and Stories, 4:5 for feed posts.

Can I change aspect ratio without cropping?

Yes, by padding with bars or a blurred background.

Is my video uploaded?

No. Cropping runs in your browser.

Why does my video look stretched?

The aspect flag or pixel shape is wrong. Re-encode with square pixels.

Does aspect ratio affect file size?

Indirectly. Size depends on pixel count, so a cropped frame with fewer pixels produces a smaller file.

Should I pad or crop for slides?

Pad. Slides have text at the edges that cropping would cut off.

What ratio are video thumbnails?

Usually 16:9, such as 1280×720.

Is 9:16 the same as portrait?

Yes. 9:16 is the standard tall portrait shape for phone video.

Which ratio is best for LinkedIn?

1:1 or 4:5 for mobile feeds; 16:9 also works.

Can I change the aspect ratio on my phone?

Yes. Use Videozify's crop tool in a mobile browser, or your gallery app's crop presets.

Guide

Video aspect ratios explained

By Mohamed Laghbar · Updated 10 October 2026

Aspect ratio is the shape of the frame, width to height. 16:9 is widescreen for TVs, laptops and most video sites; 9:16 is vertical for Reels, TikTok and Shorts; 4:5 is portrait for Instagram feed posts; 1:1 is square. Change ratio by cropping (cut edges) or padding (add bars), never by stretching.

The crop video tool converts between 16:9, 9:16, 4:5, 1:1 and 4:3 in your browser. To change pixel size while keeping the shape, use resize video.

How to change a video's aspect ratio with Videozify

Decide the target shape from where the video will be shown (see the table below).
Open Crop video and drop in the clip.
Pick the ratio. The largest centred area of that shape is kept.
Press Crop video and wait for it to finish.
Optionally scale the result to a standard resolution with Resize video, then download.

Open the crop video tool →

Aspect ratio vs resolution

Aspect ratio is the shape; resolution is the number of pixels. 1920×1080 and 1280×720 are both 16:9. 1080×1920 is 9:16. Many resolutions share a ratio, and changing resolution without changing the ratio is resizing. Changing the ratio means cropping or padding.

Standard ratios and where they're used

16:9 (1920×1080, 3840×2160): TVs, laptops, video sites, presentations
9:16 (1080×1920): Reels, TikTok, Shorts, Stories, Snapchat
4:5 (1080×1350): Instagram and Facebook feed posts
1:1 (1080×1080): square posts, carousels, some ads
4:3 (1440×1080): older TV footage, iPad screens, some webcams
21:9 / 2.39:1: cinematic widescreen films
1.91:1 (1200×628): link previews and some feed ads

Why stretching is the wrong answer

Forcing a 16:9 video into a 9:16 frame by stretching makes people tall and thin and is instantly noticeable. Some apps do this by accident when a file's display aspect ratio flag is wrong. Always crop or pad instead. If a video already looks stretched, it may have non-square pixels or a wrong aspect flag, and re-encoding with square pixels fixes it.

Crop vs pad

Cropping fills the target frame and removes edges, which is best when the subject is central. Padding (letterboxing or pillarboxing) keeps the whole picture and adds bars, which is best when nothing at the edges can be lost, such as slides, screen recordings or group shots. A blurred-background pad looks more polished than black bars and is common for repurposed landscape footage on vertical platforms.

Shooting for multiple ratios

If one video needs to work in 16:9 and 9:16, shoot landscape at 4K and keep the subject centred with room above and below. The centre crop for vertical then has enough resolution (1215×2160) for full-quality 1080×1920. Some creators shoot vertical and landscape versions separately for important content.

Native tools for changing ratio

iPhone Photos and Android Google Photos both crop video to preset ratios. Clipchamp on Windows switches projects between 16:9, 9:16, 1:1, 4:5 and 21:9 and lets you fit or fill each clip. iMovie on Mac is fixed to 16:9; Final Cut Pro supports any ratio.

Display aspect ratio vs storage

Some formats store video with non-square pixels. DVD video, for example, stores 720×480 pixels but displays them as 4:3 or 16:9 by stretching each pixel. The file contains a display aspect ratio (DAR) or sample aspect ratio (SAR) flag that tells players how to show it. Problems arise when editing or web tools ignore the flag, making video look squashed. Converting to square pixels at the correct display size, for example 854×480 for 16:9, removes the ambiguity.

Safe areas inside a ratio

Even when the ratio is right, platforms overlay their interface on part of the frame. Vertical platforms put buttons on the right and captions at the bottom. TVs historically cropped the edges (overscan). Keep titles and faces within the central 80–90% of the frame. Editors call this the title-safe area, and many show guides for it.

Choosing a ratio for a new project

If the video is mainly for phones and social feeds, shoot and edit vertical (9:16). If it's for a website, presentations, TV or long-form video sites, use 16:9. If you need both, shoot 16:9 at 4K with central framing, then crop vertical versions. Square 1:1 is a compromise that works acceptably in both feeds but best in neither.

Rotating vs changing ratio

A sideways vertical video looks like a landscape video with the picture turned. It doesn't need cropping; rotating it 90° restores the correct 9:16 shape without losing anything.

Aspect ratios for ads and thumbnails

Ads often require specific ratios: 1:1 and 4:5 for feed ads, 9:16 for Stories and Reels ads, 16:9 for in-stream video ads. Video thumbnails for long-form platforms are typically 16:9 at 1280×720. Preparing one master in the widest ratio you need and cropping versions for each placement saves reshooting.

Common mistakes

Stretching a video to fill a frame instead of cropping or padding
Uploading landscape video to vertical platforms without reframing
Putting text near the edges, where crops and app buttons hide it
Upscaling a small crop expecting more detail
Mixing ratios in one merged video without planning letterboxing

Frames per second and ratio are independent

Changing the aspect ratio doesn't change the frame rate or duration, and vice versa. A 9:16 video can be 24, 30 or 60 fps. Choose the frame rate for motion, such as 60 fps for sport and gaming and 24–30 fps for most other content, and the ratio for where the video will be shown.

Quick reference by platform

Website and presentation video: 16:9
Reels, TikTok, Shorts, Stories: 9:16
Instagram and Facebook feed: 4:5 (or 1:1)
LinkedIn feed: 1:1 or 4:5 on mobile, 16:9 on desktop
Cinema-style trailers: 2.39:1 letterboxed inside 16:9

Checking a video's ratio

Divide width by height. 1.78 is 16:9, 0.5625 is 9:16, 0.8 is 4:5, 1.0 is 1:1 and 1.33 is 4:3. On Windows, right-click the file and choose Properties > Details to see frame width and height. On Mac, select it and press Command-I, then look under More Info.

Frequently asked questions

What's the most common video aspect ratio?: 16:9 for widescreen, and 9:16 for vertical social video.
Is 1080p always 16:9?: 1920×1080 is 16:9. Vertical 1080×1920 is 9:16.
What ratio should Instagram videos be?: 9:16 for Reels and Stories, 4:5 for feed posts.
Can I change aspect ratio without cropping?: Yes, by padding with bars or a blurred background.
Is my video uploaded?: No. Cropping runs in your browser.
Why does my video look stretched?: The aspect flag or pixel shape is wrong. Re-encode with square pixels.
Does aspect ratio affect file size?: Indirectly. Size depends on pixel count, so a cropped frame with fewer pixels produces a smaller file.
Should I pad or crop for slides?: Pad. Slides have text at the edges that cropping would cut off.
What ratio is 1920×1080?: 16:9.
What ratio is 1080×1350?: 4:5.
What ratio are video thumbnails?: Usually 16:9, such as 1280×720.
What ratio is 4K?: 3840×2160 is 16:9.
Is 9:16 the same as portrait?: Yes. 9:16 is the standard tall portrait shape for phone video.
Which ratio is best for LinkedIn?: 1:1 or 4:5 for mobile feeds; 16:9 also works.
Can I change the aspect ratio on my phone?: Yes. Use Videozify's crop tool in a mobile browser, or your gallery app's crop presets.