How to get an image under 100 KB
- Drop or choose your images. The target is already set to 100 KB and the output format to JPG, which reaches small sizes with the least visible damage.
- Pixdesk tries the highest quality first and steps down until the file fits. If quality alone cannot get there, it reduces the width by small steps and tries again. The row tells you what it did, for example “Quality 64% to fit under 100 KB”.
- Drag the preview divider and zoom to 100% to check faces and text, then download the file or a ZIP of the whole batch.
Pixdesk counts 1 KB as 1,000 bytes and always lands below the number, so the file also passes forms that count 1 KB as 1,024 bytes. A 100 KB limit means at most 100,000 bytes here.
Where a 100 KB limit shows up
100 KB is the size many content management systems, forums and listing sites recommend for inline images, and a common cap for attachments in support portals and online forms. It is also a sensible budget for an image in an email signature or a newsletter, where every recipient downloads it.
At 100 KB you can usually keep a photo at its full web size. A 1600-pixel-wide image fits comfortably at moderate quality, and a 1200-pixel image can stay at 80% or more.
What the sample shows
Our 1600 × 1067 sample photo started at 499 KB. Pixdesk kept its full dimensions and found quality 64%: 99 KB, an 80% reduction. Because the sample has heavy added grain, real photos with smoother areas typically fit at a higher quality.
| If you also set Max width | Effect on quality under 100 KB |
|---|---|
| Keep original (1600 px) | quality 64% on the sample |
| 1200 px | room for roughly 75–85% quality |
| 800 px | room for 85% or more |
Combining a width limit with the target is often the best trade: web pages rarely display images wider than their column, so extra pixels are wasted bytes.
Tips for a better small file
- Set Max width to the size the page shows. A blog column is often 700–900 px wide; doubling that covers high-density screens.
- Try WebP if the destination accepts it. Google measured WebP 25–34% smaller than JPG at the same quality, which means a sharper image under the same 100 KB.
- Batch similar images together. Product photos shot the same way compress to similar quality levels, which keeps a listing consistent.
Frequently asked questions
How do I compress a JPG to 100 KB?
Open Pixdesk with the 100 KB target set, drop the JPG, and wait for Done. Pixdesk chooses the highest quality that keeps the file under 100 KB and keeps the original dimensions whenever possible.
Will compressing to 100 KB change the image size in pixels?
Usually not. Only very large or very detailed images are reduced in width, and the row shows the final dimensions whenever that happens.
How much quality is lost?
On our grainy sample photo the result used quality 64%, which looks the same as the original on a normal screen. Smoother photos fit at higher quality.
Can I compress PNG screenshots to 100 KB?
Yes. Keep PNG with Smart mode for sharp text, or switch to JPG for photographic screenshots. Both can usually get under 100 KB.
Can I set a different target, like 150 KB?
Yes. Type any number of kilobytes in the Custom box under Target file size. The batch is redone automatically.
How many images can I compress to 100 KB at once?
Up to 30 per batch. Each image gets its own quality so that every file lands under the target.
Do the compressed files keep my camera and location data?
No. Pixdesk writes new files that contain only the pixels, so EXIF camera details and GPS coordinates are removed.
Does Pixdesk upload my images?
No. Everything runs in your browser and the page makes no requests while it works. See the Verify no upload guide to check.
Sources
- Chrome for Developers: Lighthouse “Efficiently encode images” — estimates savings by re-encoding JPEGs at quality 85
- Google for Developers: An image format for the Web (WebP) — lossy WebP 25–34% smaller than comparable JPEG; lossless WebP 26% smaller than PNG
Sources checked on 19 October 2026.