Remove edges
Crop to fill
At the default zoom, the output uses the largest fitting native-size frame. Drag to choose the visible area; zooming in enlarges the selected area and may soften detail.
Free image aspect ratio changer
Image Aspect Ratio Changer
Upload an image, choose a new ratio, then crop to fill or keep the whole image with a background. Preview the frame before downloading in JPG, PNG, or WebP.
- Runs in your browser
- No image upload
- Review before download
Choose an image
Select one JPG, PNG, or static WebP and review its current dimensions and ratio.
Upload an image to preview your new frame.
What is an aspect ratio changer?
An aspect ratio changer changes the shape of an existing image, such as from 4:3 to 16:9. This aspect ratio converter lets you crop outer edges or expand the canvas without stretching the subject. It is different from choosing an exact output width and height.
How to change the aspect ratio of an image
- 1. Upload your imageChoose a JPG, PNG, or static WebP from your device.
- 2. Choose ratio and framingPick a preset or custom decimal ratio, then crop or keep the whole image. Review the live preview.
- 3. Process and downloadCreate the result locally, inspect its dimensions and format, then download.
Crop or keep the whole image
Both methods preserve proportions. Choose what should happen at the new frame edges.
Keep all content
Keep whole image
The source keeps its native dimensions while the canvas expands. Choose transparent, white, black, custom-color, or a real blurred-source background.
Aspect ratio changer FAQ
What is an aspect ratio changer?
It changes an existing image’s width-to-height relationship by cropping edges or expanding the canvas, without stretching the subject.
How do I change the aspect ratio of an image?
Upload a JPG, PNG, or static WebP, choose a ratio, select Crop to fill or Keep whole image, preview, process, and download.
Can I change aspect ratio without cropping?
Yes. Keep whole image expands the canvas while retaining every part of the source.
More questions
Can I change aspect ratio without stretching?
Yes. Neither framing mode distorts the source proportions.
How do I make an image 16:9?
Select the 16:9 preset. Crop to fill trims edges; Keep whole image extends the canvas with your chosen background.
What is a 4:3 aspect ratio?
For every four units of width there are three units of height. Examples include 1600 × 1200 pixels.
What is a 3:2 aspect ratio?
For every three units of width there are two units of height. A 3000 × 2000 image is 3:2.
What is a 4:5 aspect ratio?
For every four units of width there are five units of height. It is a taller portrait frame.
Can I enter a custom aspect ratio?
Yes. Enter positive decimal values, such as 1.85:1 or 2.35:1.
Will PicRecast enlarge my image?
By default, Crop uses the largest fitting frame and Keep whole image only expands the canvas. If you zoom into a crop, the selected source area is enlarged to fill the output and may lose detail.
Can I keep a transparent background?
Yes with PNG or WebP. JPG cannot store transparency and uses an opaque background, white by default.
Which output format should I use?
Keep the source format unless you need a specific format. PNG or WebP support transparency; JPG uses opaque pixels and lossy quality.
Are images uploaded?
No. Image bytes are processed in your browser and are not sent to PicRecast or an external image-processing service.
Does changing aspect ratio change resolution?
It can. Crop reduces one dimension; whole-image framing increases canvas dimensions. Neither mode stretches the original pixels.