Open the photo
Select the image you want to resize.
Free image tools · No signup
Image Resizer
Resize an image to a chosen width and height. Lock the aspect ratio to keep the photo’s proportions.
No photo uploadsNo watermarksWorks in your browser
Resize dimensionsDrop your image here
or choose a file from your device
JPGPNGWebP
Maximum 20 MB per image
Processed on your device
Your file is ready
Your photos stay in this browser. No account needed.
For a square profile picture, crop to a square before resizing to the final pixels.
Quick steps
How to resize an image
Enter width or height
Keep the aspect-ratio lock on unless you deliberately want to change the proportions.
Check the preview
Review the resized image and save the JPEG copy.
A few useful details
Change the pixels without stretching the subject
If a website asks for 800 × 600 pixels, changing the file’s KB size is not enough. Enter the required width or height here to make a copy with different pixel dimensions.
Keep Lock aspect ratio switched on when you want the photo to retain its shape. Changing one dimension will update the other. If you unlock it and choose a different shape, the subject will stretch to fill the new rectangle.
Need a square picture from a wide photo? Crop to a square first, then resize. The result from this tool is JPEG; use a compressor afterwards only if you also need to meet a file-size limit.
Before you save the result
For a square profile picture, crop to a square before resizing to the final pixels.
JPEG output uses a white background where the original image was transparent.
Decide whether to resize, crop or both
Resize changes size; crop changes the frame
If a photograph already has the right shape, resizing can make it fit the required pixels. If a wide image must become square without distorting the subject, crop to a square first. Resizing alone cannot invent the missing space or choose what should be cut away.
Use the aspect-ratio lock deliberately
With the lock enabled, entering a width changes the matching height. That is helpful when you want the whole image to keep its proportions. If the destination requires two dimensions that do not match those proportions, decide on a crop instead of silently stretching the picture.
Avoid enlarging more than you need
Increasing a 400 px photo to 1,600 px makes a larger canvas, not a new high-detail photograph. The result can look soft. If you need to show an object clearly at a larger size, try to find a larger original rather than relying on resizing to restore detail.
Check bytes after the dimensions are right
An image can have the correct width and height and still exceed an upload limit. Save the resized copy, check its size and compress it only if necessary. Keep the original, especially when you may need another shape or a larger version for a different placement.
| Original image | New width | Matching height |
|---|---|---|
| 1,200 × 800 px (3:2) | 600 px | 400 px |
| 1,600 × 900 px (16:9) | 800 px | 450 px |
| 1,000 × 1,000 px (1:1) | 500 px | 500 px |
Visual examples
See the difference dimensions make
Real resized sample images. The preview boxes fit the available space; read the pixel labels to compare dimensions.
Input![A wider image for content — Input]()
After![A wider image for content — After]()
EXAMPLE 01
A wider image for content
This sample is resized to 800 × 800 pixels. Dimensions describe the image grid, while KB describes the stored file.
Real resized sample images. The preview boxes fit the available space; read the pixel labels to compare dimensions.
Input![A smaller image for cards — Input]()
After![A smaller image for cards — After]()
EXAMPLE 02
A smaller image for cards
A 480 × 480 sample shows how fewer pixels change the exported size. Keep enough pixels for the place the image will appear.
Real resized sample images. The preview boxes fit the available space; read the pixel labels to compare dimensions.
Input![A compact thumbnail — Input]()
After![A compact thumbnail — After]()
EXAMPLE 03
A compact thumbnail
A 240 × 240 export works as a small preview example. Enlarging it later cannot restore detail that was removed.
Real resized sample images. The preview boxes fit the available space; read the pixel labels to compare dimensions.
Frequently asked questions
How do I stop faces looking stretched?
Leave the aspect-ratio lock on. If the required shape is different from the original, crop first instead of forcing both dimensions.
Will a larger size make a blurry photo sharp?
No. More pixels do not restore detail that was missing in the source. This is not an AI upscaler.
Will it keep a transparent background?
No. This resizer exports JPEG, so transparent areas become white.
Which number should I enter first?
With the lock on, enter the dimension the destination actually specifies. The matching dimension updates automatically.
Can the output be square without changing the subject’s shape?
Yes, if you first choose a square crop that contains the area you want. Simply unlocking the ratio and forcing a square will stretch the whole image.
Keep working
Tools you might need next
Image Dimension Checker
Read width, height, size and format.
Open tool ↗Image Aspect Ratio Calculator
Calculate image shape and matching dimensions.
Open tool ↗Image DPI Converter
Set JPEG resolution metadata for print workflows.
Open tool ↗Crop Image
Keep the part you need, with a live crop preview.
Open tool ↗