Free · no login · no upload
Reduce Image Size in KB
Pick the KB limit your form asks for — 50, 100, 200, 500 or any custom number — and shrink your JPG, PNG or WebP image to fit, right in your browser.
Drag an image here
PNG, JPG or WebP · up to 25MB
+ Select ImageNo signup. No upload. Your image stays on your device.
Your image is processed in your browser and never leaves your device.
After compression, we’ll take you to the result automatically.
How to reduce image size in KB
Start from the limit you were given, not from the image. Most forms state a maximum like "under 200 KB" — that number is your target.
- 1
Add your picture by dropping it into the box above or tapping Select Image.
- 2
Pick the KB limit you need from the size buttons, or choose Custom and type the exact number.
- 3
Decide if the width and height must stay the same, then press Compress Image and download the smaller file.
Choose the right image size
50 KB
Strict government, exam and scholarship portals, ID photos and signature scans.
100 KB
The most common cap for job sites, school admissions and profile pictures.
200 KB
Document photos, certificates and forms that allow a bit more detail.
500 KB
Website images, portfolios and email attachments where clarity matters.
Custom size
Any other limit, like 30 KB, 150 KB or 1 MB — type it in and the tool aims for it.
Reduce file size without changing dimensions
Some portals ask for a fixed pixel size, such as 600×600, as well as a KB limit. Choosing "Never resize image dimensions" locks the width and height and only lowers the encoding quality. If the limit can't be met this way, you get the smallest version possible at the original size, plus a clear note explaining why.
Reach a specific KB limit
When the form only cares about the file size, choose "Resize if needed to reach target size". The tool still tries quality first, and scales the picture down only when that isn't enough. The result shows the original and new dimensions, so you always know what changed. This is the best choice for tiny limits like 20–50 KB.
Image quality and file size
Three things are linked: file size, pixel dimensions and visual quality. Fewer KB means giving up either some sharpness or some pixels. A large photo squeezed into a small limit at full size can look blocky, while a slightly smaller image at the same KB often looks cleaner. If a form allows it, pick the largest target you're permitted — it always keeps the most detail.
Frequently asked questions
How can I reduce an image size in KB?+
Select a JPG, PNG or WebP image, pick a target such as 50, 100, 200 or 500 KB (or type your own number with Custom), then press Compress Image. The tool finds the highest quality that fits your limit and gives you a file ready to download.
Can I choose an exact KB size?+
Yes. Choose Custom and type any size between 5 and 10,000 KB. The result lands at or slightly below the number you enter, because image encoders work in small steps — which is exactly what an upload limit like 'max 150 KB' needs.
Can I reduce image size without changing dimensions?+
Yes. Select 'Never resize image dimensions' and the width and height stay exactly as they are; only the compression level changes. If the limit is too small for that, you'll see a yellow notice with the smallest size reached.
Will reducing image size lower quality?+
Some detail is always traded for a smaller file, but how much depends on the gap between the original and the target. Moderate reductions are usually invisible. Use the before and after preview to judge the result before downloading.
Are my images uploaded anywhere?+
No. All processing happens inside your browser on your own device. Your image is never sent to a server, and nothing is stored after you close the page.
Which image formats are supported?+
JPG, PNG and WebP. JPG and WebP keep their format. PNG files are saved as WebP (or JPG in older browsers), because PNG has no quality setting that can shrink the file to a set size.
Know your exact limit? Go straight to the 50KB, 100KB, 200KB or 500KB compressor. Questions? Compress for upload · Contact us or read our privacy policy.