Compress an image to 900 KB
A margin below a 1 MB limit, with almost no visible loss.
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How it works
Add your images
Drag and drop, paste, or pick files. They upload over an encrypted connection.
Pick a quality or a target size
Use the quality slider, or tell it exactly how many KB or MB you need.
Download
Save each file, or grab them all at once as a ZIP.
Many upload pages cap a picture at 1 MB. A file of 990 KB sits so close to the line that a different counting rule can reject it, so 900 KB gives a safe margin and still keeps nearly all the detail of the original.
The tool picks the best quality that keeps the file at or below 900,000 bytes. Most phone photos only need a small quality drop and a width trimmed to about 2800 pixels to get there, so the result looks like the original.
Use this page when a rejection would cost you time, such as an application deadline or a listing that has to go live. One hundred kilobytes is a small price for avoiding a second round.
Why not aim for exactly 1 MB
Systems disagree about what a megabyte is. A form that counts 1 MB as 1,048,576 bytes accepts a file that one using 1,000,000 bytes turns away. A target of 900 KB passes both, and it also leaves room for any bytes the upload adds around your file.
What 900 KB buys in quality
Nine hundred kilobytes is 7.2 million bits, enough for about 2700 pixels square or 3000 by 2000 for a landscape. At that size a photograph looks clean even when zoomed in, and fine texture in skin, fabric and foliage survives.
Photos for listings and applications
Property listings, marketplace adverts and applications often take one to five pictures of up to a megabyte each. Compress them all to 900 KB and check each result, then upload with confidence that none will be bounced for size.
If the file is smaller than expected
A simple picture may finish at 500 KB, because it reached the best quality well before the limit. That is fine. A larger file would look no better, so nothing is lost by stopping there.
Keeping the original
Keep your original in a separate folder. If a site later raises its limit, or asks for a larger file, you will have the full picture to compress again for the new target.
A quick routine before you upload
Resize to the width the site shows, compress to 900 KB, then check the file size on your own computer. Open the result and zoom to 100 percent to look for artefacts. If all is well, upload it.
Keep a note of the settings that worked, so the next batch takes seconds.
If the site still rejects the file
If a site rejects a file that is clearly under the limit, check its other rules. It may demand a certain format, a minimum width or a square shape. The text of the error is usually more precise than the number in the help page.
If the problem persists, lower the target to 700 KB and try again.
Frequently asked questions
Is 900 KB the same as 0.9 MB?
Yes. This tool counts 1 MB as 1000 KB, so 900 KB is 0.9 MB.
Can I use 950 KB instead?
Yes. Choose Custom in the Target size menu. The closer to 1 MB you go, the smaller your margin.
Why is my photo smaller in pixels?
A detailed photo needs more bytes per pixel, so the tool trims pixels to fit under 900 KB.
Will transparency be kept?
In PNG and WebP, yes. JPEG has no transparency.
Can I use a PNG for a 900 KB target?
Yes, but a PNG photograph is large, so the tool reduces the pixels to fit. JPEG keeps more of the picture at the same weight.
Do I need an account?
No. Add the file, set the target and download.