Offcloud guide
PNG to JPG converter: shrink heavy images for easy sharing
PNG is perfect for crisp screenshots and graphics, but the files are heavy — often too large to email or upload. Offcloud converts your PNGs to lightweight JPGs for free, with no signup, directly in your browser. Nothing is ever uploaded: the whole conversion happens on your device.
Why convert a PNG to JPG?
PNG is the default format for screenshots and exported graphics because it is lossless, but that fidelity comes at a price: files several times larger than an equivalent JPG. A single full-screen capture can easily top several megabytes, which quickly runs up against email attachment caps, chat upload limits, and web forms that reject large files.
Converting a PNG to JPG shrinks it dramatically while keeping it perfectly usable for everyday sharing. It is the practical move when you need to send a batch of screenshots to a colleague, attach images to a support ticket, or slim down graphics before publishing them on a page where load time matters.
From PNG to JPG without leaving your browser
Unlike most online converters, Offcloud never sends your images anywhere. The conversion runs entirely in your browser using WebAssembly and the canvas API: your PNG is read, converted, and saved without ever leaving your device.
Once you close the tab, there is nothing left anywhere — because nothing ever left your machine in the first place. That makes it a safe choice for material you would rather not hand to a third-party server — work screenshots, design drafts, personal photos. It works in any modern browser, on desktop and mobile, with no account and no watermark.
Transparency, sharp text, and other things to check
Two things change when a PNG becomes a JPG, and it is worth knowing them upfront. First, JPG does not support transparency, so any transparent areas are filled with a solid background. Second, JPG is a lossy format: it discards some detail to achieve its smaller size, and no conversion can ever improve on the original quality.
For photos and colorful graphics, the difference is usually invisible; for screenshots full of small, sharp text, check the result closely before deleting anything. Keep the original PNG as your master copy and treat the JPG as the lighter version for sharing. One last note: make sure the images you convert are yours to use.
Conversion steps
- Open Offcloud and select your PNG file, or simply drag and drop it onto the page.
- Pick JPG as the output format.
- Let the conversion run directly in your browser — no file is uploaded at any point.
- Download your new JPG and share it wherever the PNG was too large to send.
Frequently asked questions
What happens to the transparent background of my PNG?
JPG does not support transparency, so any transparent areas are filled with a solid background during the conversion. If you need to keep transparency — for a logo that sits on top of other content, for example — stick with PNG for that use.
How much smaller will the JPG be compared to my PNG?
It depends on the image, but screenshots and photos typically come out several times smaller. The trade-off is that JPG is lossy: a small amount of detail is discarded to reach that size, which is usually unnoticeable in everyday images.
Will converting PNG to JPG make my image look worse?
For photos and rich graphics, the loss is generally invisible. Fine text and sharp edges are where JPG compression shows first, so review screenshots with lots of small text before discarding the original. A conversion can never increase the quality of the source image.
Do my PNG files get uploaded to a server?
No — there is no server in the loop at all. The conversion runs inside your own browser, which is exactly why it suits work screenshots and design drafts you would rather keep off third-party machines. Close the tab and no trace of your images remains anywhere.
Does Offcloud choke on really big PNG files?
There is no cap to hit: since nothing is uploaded, no server ever gets the chance to refuse your file. Your device's memory sets the pace, so a 4K screenshot or a hefty design export simply takes a moment longer to convert.