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Compress Image to 100 KB
Reduce a JPG, PNG or WebP image to 100 KB or less. Preview your compressed JPEG before downloading.
No photo uploadsNo watermarksWorks in your browser
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Maximum 20 MB per image
Target size
The result targets this upper limit. Dimensions may be reduced to fit.
Processed on your device
Your file is ready
Your photos stay in this browser. No account needed.
Try a clean crop first. For product images, keeping one subject prominent can preserve useful detail while removing pixels that contribute little.
Quick steps
How to compress an image to 100 KB
Check the target
100 KB is selected for this page. You can choose another preset if you need it.
Review and download
Check the actual file size and image preview, then save the JPEG.
A few useful details
A useful size for everyday uploads
A 100 KB limit gives a small photograph more room than a very tight 20 KB or 50 KB limit. It can still be restrictive for a large camera photo, especially if the background contains lots of texture or noise.
For a product image, a closer crop can keep attention on the item while removing space that does not help the buyer. For a portrait, make sure the face remains clear after compression.
The output is a JPEG of 100 KB or less. That takes care of the file-size limit, but it does not confirm that the photo meets a website’s separate rules about pixels, framing or content.
Before you save the result
Try a clean crop first. For product images, keeping one subject prominent can preserve useful detail while removing pixels that contribute little.
The converter uses 1 KB = 1,024 bytes. If an upload form uses a stricter decimal limit, choose a slightly lower target in the custom-size reducer.
A closer look before you submit the photo
A busy background can take up useful space
Leaves, patterned fabric and textured walls contain detail that needs encoding too. If the subject is small in the frame, a sensible crop can make the important area more prominent before you compress. It also removes pixels the destination may not need.
Product labels deserve a separate check
For a catalogue picture, inspect the label rather than just the shape of the item. Fine ingredient text, model numbers or a size marking can blur before the product itself looks noticeably worse. Use a larger target if that information needs to stay readable and the site allows it.
Check the result at its real use size
A photo that looks fine in a compact preview may look rough when shown much larger. Think about where it will appear: a form thumbnail, a small listing card or a larger detail page. Keep a better-quality original for uses that need more room.
Do not change a compliant file unnecessarily
If the original is already below the limit and meets the dimension and format rules, try it as it is. Re-encoding it is not automatically an improvement. When you do create a new copy, check whether its size and appearance are actually more useful.
Visual examples
See what compression changes
Actual sample exports at three quality settings. These examples do not promise a particular KB target for your own image.
Input![Keep fine detail — Input]()
After![Keep fine detail — After]()
EXAMPLE 01
Keep fine detail
An 85% JPEG quality example keeps a generous detail budget. Compare hair, leaves and fine edges before using the export.
Actual sample exports at three quality settings. These examples do not promise a particular KB target for your own image.
Input![Make everyday images lighter — Input]()
After![Make everyday images lighter — After]()
EXAMPLE 02
Make everyday images lighter
A 65% quality example can suit images displayed at smaller sizes. The measured file sizes show whether the export actually saves space.
Actual sample exports at three quality settings. These examples do not promise a particular KB target for your own image.
Input![Explore the size–quality trade-off — Input]()
After![Explore the size–quality trade-off — After]()
EXAMPLE 03
Explore the size–quality trade-off
A 40% example makes compression more aggressive. Look for blocky textures or rough edges and choose a higher quality when needed.
Actual sample exports at three quality settings. These examples do not promise a particular KB target for your own image.
Frequently asked questions
Does the file have to be exactly 100 KB?
Usually an upload limit means “no larger than 100 KB.” This tool treats it as an upper limit. Check whether your form also specifies a minimum.
Can I use a PNG or WebP?
Yes, if the browser can read it. The result is JPEG, so any transparent area will be placed on white.
What should I do if the result is blurry?
Start again from the original. Crop unused space, or choose a larger limit if the destination allows it. Check text and faces before submitting the image.
Why is a file close to the limit being rejected?
The website may count KB differently or have another requirement. Try a slightly lower value in Custom Image Size Reducer, and check its pixel and format rules too.
Can a 100 KB image have large dimensions?
Yes. Size depends on content and encoding as well as pixels. A simple image can use fewer bytes than a detailed image of the same dimensions.
Will a background-free PNG stay transparent?
Not in this tool. The KB reducer exports JPEG and places transparent areas on white. Keep PNG when the transparent cutout is required.
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