Resize JPG — free online tool
Resize a JPG to exact pixels or a percentage, such as a 4000 x 3000 phone photo down to 1920 wide. Saved as JPG at quality 92 with metadata dropped.
Resize images
Preview output dimensions before you process.
What to know
A JPG straight from a phone or camera is usually far larger than any screen needs. A 12 megapixel shot of 4000 x 3000 pixels fills a 4K monitor several times over, yet a blog column or a marketplace listing rarely shows more than 1200 to 1920 pixels across. Resizing a JPG to the width you actually display is the quickest way to lose the excess.
The scale factor is the same for both sides when the aspect lock is on. Taking 4000 x 3000 to a 1920 x 1080 box gives min(1920/4000, 1080/3000) = 0.36, so the result is 1440 x 1080, not 1920 x 1080. Pick Percentage instead and 48% lands on 1920 x 1440, which keeps the full height of the frame.
JPG has no alpha channel, so the redrawn picture is flattened onto white before encoding and everything is saved as JPG at quality 92. That is a second lossy generation, small at this setting but cumulative if you repeat it, so resize from the original file rather than from an earlier export.
Because the file is redrawn on a canvas, camera metadata such as GPS position, lens and timestamp is not carried into the new JPG. That is a handy side effect when you are about to publish a photo, though you should not rely on it as a privacy tool for other formats.
Choose a specific task 16
Related tools 13
How to use Resize JPG — free online tool
- Drop your JPG into the page; up to 12 files and 48 MB in total are accepted.
- Select Pixels, type 1920 as the width and keep Maintain aspect ratio ticked so the height is calculated.
- For a quick half-size copy, switch to Percentage and drag the scale to 50%.
- Run the resize and download the JPG, then compare it with the original at 100% zoom.
Quick answers
What width should I pick for a JPG on a website?
Match the largest size it is displayed at, doubled if you want sharpness on high-density screens. A column that shows at 800 CSS pixels is well served by a 1600 pixel wide JPG.
Does resizing a JPG lose quality?
Downscaling discards pixels by design, and the new JPG is encoded again at quality 92. At normal viewing sizes the difference is hard to see, but repeated re-saves add up.
Will the GPS location in my photo survive?
No. The resized JPG is drawn on a canvas and encoded fresh, so camera metadata including location is not written into it.
Why does my resized JPG sometimes end up bigger in KB than a similar one?
Detailed images such as foliage or text compress poorly at quality 92. If weight matters more than a fixed dimension, run the result through the JPG compressor and lower the quality.