Proportions
Kept unless you ask
A percentage scales width and height together. With a custom size, the image fits inside the box you give; leave one box empty to set only the width or the height.
Image Resizer
Resize JPG, PNG and WebP images online, free: by percentage or to an exact width and height.
- Free to use
- No file stored beyond 1 hour
- Encrypted over TLS 1.2/1.3
- No watermarks
Drag and drop your files here or click to upload.
Maximum file size is 1GB
Like RunConvert? Set us as a preferred source on Google.
Add to Preferred SourcesHow to resize an image
Three steps, in your browser. Nothing to install.
- 01
Add your images
Drop up to 20 JPG, PNG, WebP, BMP, TIFF or AVIF images, or paste a link.
- 02
Pick a size
Every image starts at 50%. Open its settings for 75%, 25% or an exact width and height.
- 03
Resize and download
Each image keeps its format, at the new size.
How resizing works
Resizing changes the number of pixels. Fewer pixels also means a much smaller file.
File size
Half the width, a quarter of the pixels
An image at 50% has a quarter of the pixels, so its file is usually far smaller too: handy for email, forms and websites.
- Formats
- JPG, PNG, WebP, BMP, TIFF, AVIF
- Sizes
- %, or width × height
- Files
- Up to 20, 1 GB each
- Output
- Same format as the input
Need a smaller file instead?
Keep the size in pixels and shrink the file:
More free image tools
Frequently asked questions
Common questions about resizing images with RunConvert.
Yes. It's free, without a watermark and without signing up.
No. Proportions are kept: a custom size fits the image inside the width and height you give.
Yes, with a custom size larger than the original, but it won't add detail: the picture gets softer.
Yes. Set the size on one image and choose Apply to all.
Up to 20 at a time, up to 1 GB each.
They are encrypted in transit, used only for this job, and deleted automatically after a few hours.
Ready to resize your images?
Free, no sign-up, no watermark.