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Exact dimensions • Exact file-size option • Browser-based

Convert Image to 9:16 Aspect Ratio

Convert photos and graphics to a vertical 9:16 format with a 1080 by 1920 starting preset, crop positioning and optional exact-KB output.

✓ No signup✓ Fit or crop✓ JPG, PNG & WebP✓ Exact KB check

Drop an image here

or click to choose a file

JPG • PNG • WebP • Up to 25 MB

Images are processed in your browser

Target specification

9:16 aspect-ratio details

ResizeDock verifies the target after processing and can also validate a maximum file-size requirement.

Width1080 px
Height1920 px
Aspect ratio9:16
OrientationPortrait
Exact file sizeOptional50 KB, 100 KB, 200 KB, 500 KB or custom

How to convert an image to 9:16

  1. Upload your image.Choose a JPG, PNG or WebP file from your device.
  2. Choose Fit or Crop.Crop fills the target frame; Fit keeps the whole image visible.
  3. Set an optional file-size limit.Pick a quick target such as 50 KB or 100 KB, or enter your own value.
  4. Create and verify the result.ResizeDock checks the dimensions, ratio, format, quality and target KB before download.

Fit vs. Crop

Crop

Best when the final canvas must be completely filled. ResizeDock preserves proportions and lets you choose which part of the image stays visible.

Fit

Best when you need to keep the entire original image. Empty space may be added around the image when the aspect ratios differ.

Designed for tall, mobile-first layouts

9:16 is a full-height vertical ratio that maps naturally to modern phone screens. It is narrower and taller than 4:5, so crop positioning matters more when converting landscape photos.

Common uses for 9:16

  • Story and reel-style graphics
  • Vertical phone wallpapers
  • Full-screen mobile promotions
  • Any workflow that specifies a 9:16 image
Related presets

Try nearby image sizes

1080×1920Portrait image size4:5Aspect ratio converter1:1Aspect ratio converter
FAQ

Questions about 9:16

What pixel size is 9:16?

1080×1920 is a common 9:16 resolution, but other proportional dimensions can also be 9:16.

Can I turn a landscape image into 9:16?

Yes. Crop lets you choose the visible vertical area, while Fit keeps the full landscape image and adds space around it.

Can I keep a 9:16 image under a file-size limit?

Yes. Choose JPG or WebP and set a maximum KB target for automatic quality optimization.