Image Resizer: Resize photos by pixels or percent, one or many at once. Input: Image files and values you enter. Output: Results shown on the page and a downloaded file. Privacy: Runs in your browser: inputs and files stay on your device and are not uploaded.
How to resize an image
- Drop a photo on the box above, or tap it to pick one. You can add several images to resize them all in one go.
- Choose Pixels and type the new width or height, or choose Percent to scale by a percentage.
- Leave Keep aspect ratio on to avoid distortion. Turn it off to set an exact width and height, then choose to crop to fill, fit with padding, or stretch.
- Pick a format and click Download. With several images, use Download all (ZIP).
Resizing without losing quality
Making an image smaller is always safe: saved files are scaled down with a Lanczos3 filter, the same kind of filter photo editors use, so fine patterns such as fabric or brickwork do not turn into moiré and edges stay sharp. Making an image larger cannot add detail that was not captured. Upscaling by up to about 150% is usually acceptable; beyond that, edges get soft.
When the target shape differs from your photo, Crop to fill scales the image until it covers the whole frame and trims the edges equally, which is what social networks do. Fit inside keeps the whole picture and adds bars in your chosen background color. For the most control over what gets trimmed, crop first with the image cropper.
Private by design
Runs in your browser. Your files are not uploaded. Saving creates a fresh file, which also strips EXIF metadata such as GPS location.
Example: a 12-megapixel photo
A 12-megapixel photo (4000 × 3000 pixels) was resized to 1200 × 900 in about half a second in Chrome on a laptop, giving a 305 KB JPEG. Saved as PNG, it matched a reference Lanczos3 resize from the sharp image library almost exactly: an SSIM similarity score of 0.998, where 1 means identical. On a test pattern made to show moiré, the leftover pattern measured 1.6, the same as Lanczos3 (1.6), against 90 for simple nearest-pixel scaling. A photo stored sideways with an EXIF rotation tag came out upright, a PNG logo kept its transparency, and the GPS location and other EXIF data were removed.
How it compares with a free online resizer
| This tool | iLoveIMG (free) | |
|---|---|---|
| Images per task | No fixed limit | Up to 30 |
| Size per task | Your device memory | 200 MB |
| Tasks per day | No limit | Not stated |
Free limits as published by iLoveIMG (checked 22 October 2026): iLoveIMG pricing. They change often; the paid plans lift them.
How do I resize an image without changing its proportions?
Keep "Keep aspect ratio" ticked and enter only the width or the height. The other value is calculated for you.
What is the difference between resizing and compressing?
Resizing changes the number of pixels. Compressing changes how efficiently those pixels are stored. Resizing a large photo to the size you need is usually the biggest single way to reduce its file size.
Can I resize many images at once?
Yes. Drop several files and they are all resized with the same settings. Each keeps its own proportions when the aspect ratio lock is on.
What is the largest size I can make?
Up to 20,000 pixels on a side, depending on your device's memory. Phones may fail with very large canvases.
How do I resize a photo to a size in KB, such as 50 KB?
Resizing sets the number of pixels, not the file size. Resize to the pixel size you need here, then use Compress image to 50 KB or to 20 KB to fit the limit.