Image Resizer
Resize images to exact pixels or a percentage, keep the aspect ratio, optionally cap the file size, then download singly or as a ZIP.
Drag & drop your images here
or click to browse · you can also paste with Ctrl+V
How to resize an image
- Add your images by dragging, selecting or pasting them.
- Choose Pixels to type a width and height, or Percent to scale by a factor.
- Leave “Keep aspect ratio” ticked to avoid stretching. Optionally choose an output format and a maximum file size.
- Press Resize and download each file or the ZIP. The new dimensions are added to each file name, such as photo-1200x800.jpg.
Width, height and aspect ratio
The aspect ratio is the proportion between width and height, for example 3:2 or 16:9. Keeping it prevents the picture from looking squashed or stretched. If you enter only a width or only a height, the other side is calculated automatically. If you enter both with the ratio locked, the image is scaled to fit inside that box without cropping, so one side may end up smaller than you typed. Untick the lock to force exact dimensions, accepting some distortion.
Resizing by percentage
Percent mode scales both sides by the same factor: 50 halves the width and height, so the picture has a quarter of the pixels, and 200 doubles each side. The scale can range from 1% to 1000%, and the tool never returns a side smaller than one pixel.
Making images smaller versus larger
Shrinking an image discards pixels and, with high-quality scaling, still looks sharp. Enlarging cannot create detail that was not captured, so a photo scaled to 200% looks softer, and modest increases give the best results. For common screen sizes, 1920 × 1080 is Full HD and 1280 × 720 is HD.
Pixels, print size and DPI
Resizing changes pixel dimensions, not the physical size on paper. Print size equals pixels divided by dots per inch, so a 4 × 6 inch print at 300 DPI needs about 1200 × 1800 pixels. Screens ignore DPI and simply show the pixels, which is why a smaller pixel size gives a smaller file.
Common target sizes
| Purpose | Typical size to enter |
|---|---|
| Full HD screen or video frame | 1920 × 1080 px |
| HD screen or video frame | 1280 × 720 px |
| Image inside a blog post or email | 800 to 1200 px wide |
| Small thumbnail | 150 to 300 px wide |
Check the size a site or app asks for and enter that. Leaving one field empty lets the other be worked out from the original proportions.
Resizing many images at once
You can add up to 100 images, each up to 60 MB, and resize them all with the same settings. With the aspect ratio locked, portrait and landscape pictures each end up with the right proportions for the box you set. Download them one at a time or in a single ZIP.
Resizing to a file size limit
Tick “Limit file size to” to keep the result under a maximum in KB or MB. The tool lowers quality first and shrinks the dimensions slightly if it must. To reduce a file size without changing dimensions, use the image compressor, and to switch format at the same time choose the output format here or use the image converter. Everything runs in your browser, so nothing is uploaded.
Frequently Asked Questions (FAQs)
Choose Pixels, type the width and/or height you want and press Resize. With Keep aspect ratio on, entering one side is enough and the other is calculated for you.
Yes. Switch to Percent and enter a value such as 50 to halve both sides, or 200 to double them. Enlarging can make photos look soft because no new detail is created.
Enable the maximum file size option and enter a value in KB or MB. The tool lowers the quality and, if needed, the pixel size a little until the file fits.
Making an image smaller keeps it sharp when done with high-quality scaling, which is what we use. Making it larger cannot add detail, so keep enlargements modest.
Yes. Drop up to 100 images in, run them in one go and then download each file separately or all of them together in a single ZIP file.
No. Everything happens inside your browser, so your photos never leave your device. There is no upload, no account and nothing is stored on our servers.
Choose Pixels, turn off Keep aspect ratio, enter 1080 for width and height and press Resize. With the ratio locked, the image fits inside 1080 x 1080 instead.
Making an image smaller keeps it sharp because high-quality scaling is used. Enlarging cannot add detail, so keep enlargements small.
Yes. Add many photos, resize them in bulk online in your browser and download them separately or as one ZIP. Nothing is uploaded.
Turn on Limit file size, enter a value such as 200 KB and resize. The tool lowers the quality, and the pixels if needed, until the file fits.
No. It only scales images. If you enter both width and height with the aspect ratio locked, the picture is scaled to fit inside that size, and the result is never cropped. Use an image editor for cropping.