Convert PNG images to JPG and shrink the file size
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PNG is the format your screenshot tool, your design app and most "Save As" dialogs reach for first. It records every pixel exactly, which is wonderful for sharp edges and a problem for file size the moment the picture is a photo or a busy screenshot. One PNG export can run to several megabytes, and that is the file that bounces off an upload form or sits too heavy in an inbox. Converting it to JPG trades away the lossless precision you rarely need and hands back a file that is often five to ten times smaller, one that every browser, printer and phone already opens.
This tool reads each PNG, applies JPEG compression at the quality you set, and returns a standard .jpg. The default of 90 is high enough that the compression stays out of sight at normal viewing distance while still cutting the size hard. Pulling the slider down makes the file smaller and is fine for thumbnails or quick previews; if the picture is headed for print, leave it near the top where fine detail survives.
Not every PNG is worth converting, and it helps to know which ones gain the most. Photographs, screenshots that contain photos, and richly shaded artwork are the clear winners, since JPEG was designed for exactly that kind of continuous-tone content and shrinks it enormously. Flat material is the opposite story: a logo, a chart, a screenshot of text or a simple icon often looks crisper and weighs less left as a PNG, because JPEG's compression adds faint smudging around hard edges and fine lettering. If an image is mostly solid colour with sharp boundaries, keeping it as PNG is usually the smarter call.
JPG cannot store transparency, so any see-through areas in your PNG are painted solid white when the JPG is written. White is the safe assumption for documents and most pages, but when that transparent edge is the whole point, as with a logo that has to sit on a coloured banner, you want a format that keeps the alpha channel. PNG to WebP and PNG to AVIF both hold on to transparency while still reducing the file.
You can drop in up to 30 images at once. A single file comes back as a JPG; a batch arrives as a ZIP with each name matched to its original so nothing gets mixed up. Going the other direction, JPG to PNG reverses the trip, while Compress Image shrinks a JPG further without changing its format.
Drop in the PNGs you want to shrink. A single image is fine, and so is a whole batch at once.
The slider opens at 90, a good balance of size and sharpness. Slide it lower when a small file matters more than fine detail.
Grab the JPG, or the ZIP if you converted several at once.
It depends entirely on the picture. Photographs and detailed screenshots usually drop by 80 to 90 percent, because that is exactly the kind of content JPEG was built to compress. A flat graphic with only a handful of colours may shrink far less, and the occasional logo is actually smaller left as a PNG.
JPG has no way to record transparency, so those pixels have to be given a colour, and we use white. If you need the see-through areas to stay see-through, run the file through PNG to WebP or PNG to AVIF instead, both of which keep the alpha channel.
JPEG is a lossy format, so a tiny amount of detail is discarded, but at the default quality of 90 it isn't something you'll notice on screen. Keep your original PNG if you plan to edit and re-export later, since every JPEG save throws away a little more.
Yes. A single job takes up to 30 files. Convert just one and the JPG comes straight back; convert several and they download together in a ZIP, each named after the file it came from.
No. Each file is processed and then cleared by a cleanup job that sweeps the server every few minutes, so your PNG and the JPG it produced are both gone within minutes. We don't archive them or look inside them.