Image Resizer
Change the pixel dimensions of your images in seconds. Enter a size, pick a preset or scale by percentage, and decide whether to fit, crop or stretch.
- Files stay on your device
- No sign-up
- Free to use
How to use Image Resizer
- Drop one or more images onto the upload area.
- Choose Dimensions to enter a width and height (or pick a preset), or Percentage to scale relative to the original.
- Select how the image should meet the target size: fit inside it, crop to fill it, or stretch.
- Select Resize images and download the results.
Image Resizer features
Three fit modes
Fit keeps the whole picture and its proportions, Crop fills the exact size from the centre, Stretch forces the dimensions.
Ready-made presets
One-click sizes for Full HD, Instagram posts and stories, YouTube thumbnails, Facebook and X headers.
Scale by percentage
Halve or double every image in a batch regardless of its starting size.
No accidental upscaling
An optional safeguard leaves images that are already smaller than the target untouched.
Sharp downscaling
Large reductions are performed in steps for a cleaner result than a single resample.
Output format choice
Keep the original format or save as JPG, PNG or WebP with adjustable quality.
When to use Image Resizer
- Making a profile picture or banner the exact size a platform asks for.
- Shrinking camera photos to a sensible width for a blog or online shop.
- Meeting pixel requirements for passport, visa or exam application photos.
- Producing thumbnails for a gallery from full-size originals.
Image Resizer FAQ
How do I resize without distorting the image?
Use Fit or Crop. Fit scales the image to sit inside the target box with its proportions intact, so one side may be shorter than requested. Crop fills the box exactly and trims the overflow evenly from the edges. Only Stretch changes proportions.
Can I enter just a width?
Yes. Leave the height empty and it is calculated from each image's proportions, and vice versa.
Will enlarging an image make it sharper?
No. Upscaling adds pixels by interpolation, which makes the picture bigger but softer. For best quality, start from the largest original you have and scale down.
Does resizing reduce file size?
Yes. Halving the width and height leaves a quarter of the pixels, so the file is usually around a quarter of the size. For further reduction use the Image Compressor afterwards.
What is the largest size I can create?
Up to about 16,000 pixels on a side, subject to your device's memory. Phones may hit their limit sooner with very large images.
Pixels, proportions and quality
An image's size on screen is determined by its pixel dimensions. A 4000 × 3000 photo holds twelve million pixels, far more than a web page or email needs, and every one of them has to be stored and downloaded. Resizing recalculates the picture on a smaller grid, averaging neighbouring pixels to produce each new one.
The ratio of width to height is the aspect ratio. When the target has a different ratio from the source, something has to give: either the image keeps its shape and does not fill the target (fit), part of it is cut off (crop), or it is squashed (stretch). For photographs of people and products, fit or crop is almost always what you want.
Quality is preserved best by resizing once from the original. Each additional resize or lossy save compounds small errors, so keep your source files and regenerate sizes from them when requirements change.