01
Open your image and check its dimensions
Add a PNG, JPG, or WebP image. Read the original width and height before choosing a size, especially when your design or upload form requires an exact pixel dimension.
Resize a PNG, JPG, or WebP image online with custom dimensions
Resize an image to custom pixel dimensions or a percentage. Keep its aspect ratio, preserve PNG transparency, and preview the output size locally.
Free to use No watermark Files stay private
Resize your image in pixels
One image. Ready for its next use.
Drop a PNG, JPG, or WebP here. Up to 20 MB and 16 megapixels.
FROM SOURCE TO FINISHED FILE
How to use the image resizer online
02
Set the size while preserving the shape
Enter target dimensions or a percentage. Keep aspect ratio locked for an undistorted image; unlock it only when deliberately changing the proportions.
03
Preview the new size and save the image
Inspect fine text and edges at the output size. Choose an export format suited to transparency or an opaque picture, then check the downloaded file's dimensions.
Resize a transparent PNG without changing its aspect ratio
Resizing changes the pixel dimensions of the entire image. It is useful after background removal when a cutout is too large for a thumbnail, slide, avatar, or website layout. Keeping the aspect ratio locked changes width and height together so a person or product is not stretched.
PNG or supported WebP output can keep the source's transparency. That is different from removing a background: if the original picture is opaque, resizing it does not create a cutout. Use a background-removal tool first when you need transparent areas.
Choose between resizing an image and cropping its canvas
Resize when you want the whole picture at a different size. Crop when you need a different framing or aspect ratio without stretching. For example, turning a wide photo into a square usually needs a crop before you set the final square dimensions.
Increasing dimensions uses browser image interpolation. It can make a file larger, but it does not recover missing detail or perform AI upscaling. Fine text may become softer after scaling, so inspect the preview and retain the original source.
What to know before using this image resizer
- This tool changes dimensions; it does not guarantee a particular file size in KB.
- Upscaling cannot recreate detail missing from the original.
- Animated images, SVG, GIF, HEIC, and layered design files are not supported workflows.
PRACTICAL ANSWERS
Image resizer questions and answers
Formats, useful settings, and the details that affect your result.
Can I resize an image to an exact width and height?+
Yes. Enter the target pixel dimensions within the output limits. Keep the ratio locked to preserve proportions, or unlock it if stretching is intentional.
How do I avoid stretching a portrait when resizing?+
Keep aspect ratio locked. If the destination needs a different shape, crop the image to that ratio first rather than forcing unequal scaling.
Will a resized PNG keep its transparent background?+
PNG output preserves transparent pixels. WebP can preserve them where its encoder is supported. JPG output needs an opaque background.
Does enlarging an image improve its quality?+
No. Canvas interpolation creates more pixels from existing ones but does not recover detail or perform AI upscaling. Enlargement may make edges look softer.
Is reducing dimensions the same as reducing file size?+
Smaller dimensions often reduce bytes, but file size also depends on format, image detail, and encoding settings. Inspect the actual exported file instead of assuming a specific KB target.