Your files never leave your device. All processing happens in your browser.
Open Img Stop Resize Image, add your photos and choose Resize by Size or Percent. Enter the new width or height in px, cm, mm or inches; Keep aspect ratio fills in the other value. Click Resize images and download the files one by one or as a ZIP.
About the Resize Image
Img Stop Resize Image changes the width and height of JPG, PNG and WebP images. You can enter the size in pixels, or in centimeters, millimeters or inches with a DPI value for print. You can also scale by percent, from 1% up to 400%. Large reductions are done in smooth steps, which keeps fine detail sharp instead of jagged.
Resizing is needed when a website, form or printer asks for an exact size, such as 600×600 pixels or 3.5×4.5 cm. When the new shape is different from the original, you choose what happens: stretch the picture, crop to fill the frame, or fit the whole picture inside and fill the empty space with a color.
Key features
- Many unitsResize in px, cm, mm or inches, with a DPI setting for print sizes.
- Resize by percentScale every image from 1% to 400% with one slider.
- Keep aspect ratioType the width and the height updates by itself, so nothing looks stretched.
- Three fit modesStretch, Crop to fill, or Fit with background when the ratio changes.
- Bulk resizeApply the same size to many images and download them as one ZIP.
- Format and qualitySave as the original format, JPG, PNG or WebP with adjustable quality.
How to use the Resize Image
- Add your images Drop your photos, click Choose files, or paste with Ctrl+V. The first image fills in its current size.
- Choose how to resize Pick Size and select the Unit (px, cm, mm, in), or pick Percent and move the slider.
- Enter the new size Type the Width or Height. Untick Keep aspect ratio if you need an exact shape, then choose a fit option.
- Set format and quality Choose the Output format and Quality. Quality 90% is the default.
- Resize and download Click Resize images, then save each file or use Download all (ZIP).
Resize Image at a glance
| Price | Free |
|---|---|
| Input formats | JPG, PNG, WebP |
| Output formats | Same as original, JPG, PNG or WebP |
| Units | Pixels, cm, mm, inches, percent (1–400%) |
| Fit modes | Stretch, Crop to fill, Fit with background |
| Batch | Yes – ZIP download |
| Processing | In your browser – files are not uploaded |
When to use it
- Resize a photo to 600×600 pixels for a product listing or profile picture.
- Make a picture exactly 3.5×4.5 cm at 300 DPI for a printed form.
- Shrink a folder of camera photos to 50% before uploading them to a website.
- Fit a tall phone photo into a wide 1920×1080 frame with a white or black background.
- Reduce banner images to the exact width your website theme uses.
Tips for the best result
- Making an image smaller keeps it sharp; making it much bigger cannot add detail. For enlarging, try the Image Enlarger.
- When you work in cm or inches, set DPI to 300 for print. The tool converts it to the right number of pixels.
- With Keep aspect ratio on, the image fits inside the width and height you give, so one side can be a little smaller.
- Use Crop to fill when a site needs an exact square or banner and you do not want empty borders.
Frequently asked questions
How do I resize an image to a specific size in cm?
Choose Resize by Size, set Unit to cm and set DPI, usually 300 for print. Then type the width and height, for example 3.5 and 4.5. The tool converts these values to pixels using the DPI, so the printed photo comes out at the right size.
How can I resize without stretching the photo?
Keep the Keep aspect ratio box ticked. When you change one side, the other side changes in the same proportion. If you need an exact shape, untick it and choose Crop to fill or Fit with background instead of Stretch.
Does resizing reduce the file size?
Yes, making an image smaller in pixels almost always makes the file lighter, because there is less data to store. You can lower the Quality slider as well for an even smaller file. To hit an exact KB limit, use the Compress to KB tool after resizing.
Can I resize many images to the same size at once?
Yes. Add all your images, set the size once and click Resize images. Every image is processed with the same settings. When they are ready, click Download all (ZIP) to save them together.
What is the difference between pixels and DPI?
Pixels are the real dots that make up a digital image. DPI says how many of those dots are printed per inch. A 1200 pixel wide image at 300 DPI prints 4 inches wide. On screens only the pixels matter; DPI matters for printing.
Last updated October 29, 2026 by the Img Stop team.