Shrink oversized PNG photos and screenshots into much smaller JPG files, with a quality slider you control. Nothing is uploaded, and there’s no account, watermark or limit.
Add your PNG files by dragging them onto the drop zone or clicking it to browse.
Adjust the quality slider. It starts at 90%; lower values give smaller files with more visible compression.
Choose a metadata option if you need to (location is removed by default), then click Convert. Any transparent areas are flattened onto white.
Download the JPGs one at a time, or all together with “Download all (.zip)”.
PNG (Portable Network Graphics) was created in the mid-1990s as a patent-free replacement for GIF. It compresses losslessly: the image you open is pixel-for-pixel the image that was saved, and it supports a full alpha channel for transparency.
Lossless storage is ideal for screenshots, icons and diagrams, where large areas share the same colour. It is inefficient for photographs. The fine texture and noise in a photo can't be compressed much without discarding data, so a photo stored as PNG can be many times larger than the same photo as JPG.
That's usually how oversized PNGs happen: a screenshot of a photo or a video frame, an image exported from an editor that defaults to PNG, a phone screenshot of a map. Converting these to JPG is often the simplest way to get under an email attachment or upload size limit.
Windows
Paint has no quality setting and no preview of the result. If the PNG has a transparent background, check how it looks after saving.
Mac
iPhone & iPad
The original screenshots stay in Photos; delete them afterwards if you only want the JPG copies.
Convert when the PNG contains a photo or something photo-like: camera images, screenshots of videos or games, scanned pictures, maps with satellite imagery. JPG was designed for exactly this content and can cut the size dramatically while looking the same at normal viewing size.
Think twice when the image is mostly text, line art, a user interface or a logo with flat colours. JPG compression softens sharp edges and adds faint halos around letters, and flat areas can show blotches. These images are often small as PNG anyway, and the JPG version is not always smaller.
Transparency is lost. JPG has no alpha channel, so transparent pixels are placed on a white background. If you need the transparent background, for a logo on a coloured website for example, keep the PNG.
Keep the original PNG if you might edit the image again. JPG loses a little each time it is re-saved, so it is best used as the final copy you share, not the working file.
It depends on the content. Photographs and photo-heavy screenshots usually shrink a lot, while simple graphics with flat colours may barely change. Start with the default 90%; if the file is still too big, lower the quality a step at a time and check the result.
JPG cannot store transparency, so every pixel needs a solid colour. The converter places transparent and semi-transparent pixels on white, which looks natural on most documents and web pages. If you need to keep the transparency, stay with PNG.
Not entirely: JPG is a lossy format, so some data is always discarded. At 90% or higher the difference is usually invisible in photos. Text and sharp lines are the exception, since they show artifacts sooner, so check them closely or keep them as PNG.
It depends on what's in them. Screenshots of photos, videos, games or maps convert well and get much smaller. Screenshots of text, code, spreadsheets or app interfaces are better left as PNG, where letters stay perfectly sharp.
90% is a safe default that keeps photos looking like the original. Around 80% is a good next step when you need to fit a size limit. Lower settings save more space but make blockiness and colour banding visible, especially in smooth gradients.
No. The PNGs are decoded and converted inside your browser on your own device, so they never leave it. There is no signup, no watermark, and the site sets no limit on the number or size of files; only your device's memory does.
Last updated October 28, 2026
Higher quality means larger files. 90% is a good default.