PixThru

Reduce Image File Size — Free, No Upload

Make any image's file size smaller in your browser — pick a target, keep the quality you want.

KB

Drop an image here or click to choose

processed on your device — never uploaded

File size and picture size are different things, and confusing them is why images end up either too heavy or needlessly tiny. A 4,000 pixel photo can weigh 6 MB or 600 KB depending on how hard it is compressed; the pixels are the same, the bytes are not. This tool works on the bytes. You give it a target, 200 KB by default here, and it searches for the best quality that lands under it, keeping your pixel dimensions unless the target is too small to reach that way.

Typical reasons to do this: photos for an email that would otherwise bounce, product pictures for a shop page that loads slowly, a screenshot for a bug report, a scan for an online application, or a WordPress media library that is eating hosting space. In each case the picture looks the same at normal viewing size while the file drops to a fraction of its weight.

Below a certain size, which depends on how much detail the image holds, JPG compression starts to show as soft edges and faint blocks around text. When that happens, raise the target a little; the difference between 100 and 150 KB is often the difference between visible and invisible. JPG, PNG and WebP are all accepted, and nothing is uploaded, so bank statements and ID scans stay on your machine.

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Frequently asked questions

How much smaller can my image get?
Often dramatically — a multi-megabyte phone photo can drop to a few hundred KB with little visible change. You set the target and the tool hits it.
Does reducing file size lower resolution?
Not usually — it lowers quality/compression first and keeps your dimensions. It only downscales if the target is too small to reach otherwise.
Why is my screenshot bigger than a photo?
Screenshots are usually saved as PNG, which stores every pixel exactly, so a full-screen capture can weigh several megabytes. Set a target here and it comes down; if small text looks soft afterwards, choose a slightly larger target.
Will the smaller file still print well?
Print size depends on pixel dimensions, not kilobytes, so as long as the tool did not need to downscale, the print size is unchanged. For prints, choose a generous target so compression artifacts do not show on paper.

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🔒 Your files are processed on your device. This tool runs entirely in your browser — nothing is uploaded.