Enter a target file size in kilobytes and create a JPG that fits it when that target is achievable without resizing. Open JPG Size Reducer.
Set the upload limit in KB
Open JPG Size Reducer and select Choose images, drag in a supported file, or use the sample. On a phone, open Settings to reach the same controls.
Move Maximum file size to the largest value accepted by your destination. The keyboard changes the target in 1 KB steps; 1 KB here is 1,024 bytes.
This tool chooses JPEG quality automatically. It keeps the pixel dimensions, so an unusually small target may be impossible for a detailed, large image.
Check the active preview
Inspect the selected image after changing the target. For a batch, switch source thumbnails and decide whether to use one shared target or separate values.
The displayed size is an estimate, especially when a large image has a bounded preview. The downloaded JPEG is the result to check against your upload limit.
The example in this guide
Maximum file size: 75 KB
- Input
- 2,600 x 2,000 px
- Output
- 2,600 x 2,000 px
- Input file
- 2,873,794 bytes
- Downloaded file
- 65,069 bytes
- Measured size change
- 97.7% smaller
Try a practical target
Select Start and check the final file size. If the tool cannot fit the image even at its lowest JPEG quality, choose a larger target.
Keep the downloaded copy before starting a new task. Refreshing an editor or download page returns to the main tool page; normal Back navigation can restore the current workflow.
For a strict small-file requirement, reduce dimensions with Resize Image first, then return here. Retain your original separately.
Common questions
What should I check in the downloaded result?
For a strict small-file requirement, reduce dimensions with Resize Image first, then return here. Retain your original separately.
How does JPG Size Reducer work?
Choose a target in KB with the slider and inspect the active-image preview. Start automatically selects the highest JPEG quality that fits that target without resizing. Download the final JPG, or one ZIP for a batch.
Is the preview size the exact downloaded file size?
No. The preview is an estimate from a bounded browser rendering. The final file is produced separately; check its downloaded size and visual quality.
Try this with your own file.
Try a sample or use your own file, and review the result before sharing.
