Why PNG files get so large
PNG is lossless: it reproduces every pixel exactly, with no compression artefacts anywhere. That is ideal for logos, icons, diagrams and screenshots of text, where crisp edges matter and the image uses a limited palette.
It works far less well for photographs. A photo has fine gradients and noise in every pixel, and lossless compression has almost nothing repeatable to exploit — so a PNG photo can easily be five to ten times larger than the same picture as a JPEG. Since screenshots on both macOS and Windows are saved as PNG by default, most people accumulate large PNG files without ever choosing the format.
Why convert PNG to JPG?
- Attachment and upload limits. Email providers and web forms cap file size. Converting a 6 MB PNG screenshot to JPG typically brings it under 1 MB.
- Faster websites. Photographic content served as PNG wastes bandwidth and hurts Core Web Vitals. JPEG is the right format for photographs.
- Storage and backups. A folder of PNG photos consumes several times the space of the same images as JPEG.
- Platform requirements. Some marketplaces, print services and ID-document portals accept JPEG only.
- Sharing. Messaging apps and social platforms recompress everything anyway; sending JPEG avoids an extra lossy round trip on a needlessly large upload.
How to convert PNG to JPG
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Add your images
Drag one or more PNG files onto the drop area at the top of this page, or press Choose PNG files to pick them from your device. Each file appears in the list with a preview, its original name, pixel dimensions and file size.
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Convert
Press Convert to JPG. Your browser decodes each image, draws it to an HTML5 canvas and re-encodes it. Files are handled one at a time so the page stays responsive.
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Download
Press Download JPG next to any finished image, or Download all as ZIP to grab everything at once. Filenames keep their original stem, with the extension changed.
What you gain and what you give up
The size reduction is usually dramatic for photographs and much smaller for flat graphics — a logo or a screenshot of mostly text may barely shrink, and can even grow, because JPEG is poor at hard edges. If your PNG is a diagram, screenshot of text, or line art, converting to JPG is often the wrong move: you will add visible fuzz around the edges for little or no saving.
Transparency is lost. JPEG has no alpha channel, so transparent regions are composited onto a solid colour before encoding — white by default, changeable in the options row. A transparent logo converted to JPG comes out on a white rectangle.
The conversion is lossy and one-way. Keep the PNG if you may need to edit the image later; re-saving a JPEG repeatedly compounds compression damage.
Privacy: nothing is uploaded
Most online converters send your file to a server, process it there and hand back a download link. This one does not. The page is a static site with no backend and no upload endpoint — your images are read from disk by the browser, decoded by the browser and re-encoded by the browser. They stay on your device.
A practical consequence: the tool keeps working offline once the page has loaded, and it is safe for images you would not want to hand to a third party. If you would like to verify the claim yourself, open your browser's developer tools, switch to the Network tab and run a conversion — you will see no request carrying your image. Read the full privacy policy for details on advertising cookies.
Frequently asked questions
How do I convert PNG to JPG?
Add your PNG files to the drop area, choose a quality level if you want to, press Convert to JPG, then download each result or grab them all as a ZIP.
How much smaller will the JPG be?
For photographs, typically 70–90% smaller. For screenshots of text, logos and diagrams the saving is much smaller and occasionally negative, because JPEG handles sharp edges poorly.
Will converting PNG to JPG lose quality?
Yes, some. JPEG is lossy, so fine detail is approximated. At the default 92% the loss is invisible in normal viewing, but it is real and permanent — keep your original PNG.
What happens to a transparent PNG?
The transparent areas are filled with the background colour from the options row, white by default. JPEG cannot store transparency, so there is no way to preserve it in this format.
Can I convert many PNG files at once?
Yes. Batch conversion is supported, files are processed one at a time so the page stays responsive, and Download all as ZIP gives you a single archive.
Should I use JPG or WebP instead?
If the destination is a modern website, WebP is smaller than JPEG at the same quality and supports transparency. Choose JPG when maximum compatibility matters more.
Are my PNG files uploaded to a server?
No. Everything happens inside your browser using the built-in image decoder and canvas. The site has no backend and no upload endpoint.
Is there a limit on image size?
There is no fixed file-size limit, but conversion is bounded by your device's memory and your browser's maximum canvas size. Images wider or taller than 16,384 pixels may fail — mobile Safari is the strictest here. The tool tells you when an image exceeds what your browser can handle.
Can I use this converter on mobile?
Yes. The page is responsive and works in mobile Chrome, Safari, Firefox and Edge. Very large images may fail on phones because of tighter memory limits.