Resize for web, forms and social media
For email attachments and forms, a width between 1200 and 2000 pixels is usually enough. Websites often benefit from smaller dimensions and WebP output.
Browser-based tool
Image Resizer & Size Changer
Resize images by exact pixels or percentage, keep aspect ratio and choose the final image format.
Choose images
Resize one image or a full batch
Resized files ready
How to use it well
About this image resizer
Settings, real-world decisions, release checks and limitations.
The image resizer changes pixel width and height without requiring an account. Enter exact dimensions, resize by percentage, or increase image size while keeping the original aspect ratio.
Resizing changes the pixel grid, not the amount of real detail captured by the camera. Enlarging can be useful for layout requirements, but a much larger result may look soft because new pixels are estimated from the existing image.
Choose settings by outcome
| Setting or choice | Choose it when | Trade-off |
|---|---|---|
| Pixels | Use when a portal specifies exact width and height | Unlocking aspect ratio can distort the image |
| Percentage | Use for a quick proportional reduction or enlargement | The final dimensions depend on the source |
| Format | Keep PNG for transparency; use JPG/WebP for photos | Format changes can affect file size and alpha |
| Quality | Affects JPG/WebP storage, not pixel dimensions | Low quality can add artifacts |
Recommended workflow
- 1
Read the source width, height and aspect ratio.
- 2
Keep aspect ratio locked unless the destination explicitly requires a different shape.
- 3
Enter one dimension or a percentage and choose the output format.
- 4
Check the exported dimensions with the Image Size Checker.
Common uses
- Resize a profile photo to exact pixel dimensions
- Prepare responsive images for a website
- Increase image dimensions for a layout requirement
- Create smaller copies for email and messaging
Important limitations
- Upscaling cannot recover detail that is not in the source
- Large output dimensions can use substantial device memory
- File size can increase even when quality appears unchanged
Troubleshooting
The image looks stretched
Enable Keep aspect ratio and enter only one dimension.
The file became larger after shrinking
Choose JPG/WebP or reduce quality; pixel size and byte size are separate.
An enlarged image looks blurry
Upscaling cannot recreate missing detail; use a higher-resolution source.
Image Resizer & Size Changer FAQ
What dimensions should I use for a website?
Use the display size or the site’s documented recommendation; avoid uploading full camera resolution unnecessarily.
Does changing DPI resize the image?
Not necessarily. This tool changes pixels; DPI is mainly print metadata.
Can I make a small image sharp by enlarging it?
No. Enlargement estimates new pixels but does not restore original detail.
Can I resize several images together?
Yes, with the same settings applied to the batch.
Why keep aspect ratio?
It preserves the original shape and prevents faces, logos and documents from becoming stretched.