Shrink an image by scaling it down to a percentage of its original size and re-encoding it.
Try an example
Load a ready-made sample into this tool and run it. Every result you see is calculated live by the tool itself — nothing here is a pre-written answer.
Sample: File: sample-photo.jpg
How to Use
- Choose an image (up to 10 MB).
- Set the scale percentage and quality.
- Click Run, compare sizes, then download.
Reduce file size by scaling the image down
This image size reducer shrinks a file by scaling the image to a percentage of its original dimensions and re-encoding it. Choose an image, set the scale percentage and quality, and the tool shows the new size against the original. Scaling down removes pixels, which is why it reliably makes files smaller even when re-encoding alone would not. Dimensions and file size both come down together.
When scaling beats compression alone
It is the right approach when an image is simply bigger than its destination: a camera photo headed for a web page, an oversized screenshot for a ticket or form, or artwork that must fit a smaller slot. If the display size is fixed and smaller than the original, the removed pixels were never going to be seen anyway.
Good to know
Scaling down is one-way. The downloaded file has fewer pixels than the original, and enlarging it later will soften the image because the detail is gone. Keep your original file if there is any chance you will need the full-size version again for print or a larger layout.
Frequently asked questions
Can it make an image an exact size in KB?
No. You control the scale percentage and quality, and the result depends on the image's content. If it is still too large, reduce the percentage further; the tool does not target a specific byte size.
What scale percentage should I choose?
Start from the display size. If a photo will show at half its original width, 50 percent matches dimensions to the display. Going lower saves more space but risks softness if shown larger.
Are my images uploaded anywhere?
No. Files are processed in your browser and never sent to the site's server. Scaling and re-encoding happen on your device, so the original is never copied to a server.
How to use Image Size Reducer
- Choose an image (up to 10 MB).
- Set the scale percentage and quality.
- Click Run, compare sizes, then download.
Limitations
Scaling down is one-way: enlarging the result later will soften the image. Files are processed in your browser and never sent to the site's server.