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PNG files — especially screenshots and graphics — are often much larger than they need to be for photos or web use, since PNG uses lossless compression. This tool converts your PNG to JPG entirely in your browser using the Canvas API, typically producing a smaller file. Since JPG doesn't support transparency, any transparent areas in your PNG are filled with white in the output.
Why convert PNG to JPG
PNG files are frequently much larger than they need to be, particularly screenshots and exported graphics that get shared by email or uploaded to forms with size limits. Converting to JPG applies lossy compression designed for continuous-tone imagery, which typically cuts file size dramatically. For a photograph that was mistakenly saved as PNG, the reduction is often five to ten times with no visible difference.
What you gain and what you give up
You gain a much smaller file that uploads faster and fits size limits. You give up transparency — JPG has no alpha channel, so any transparent area is filled with white — and you accept some lossy compression. For photographs that trade is almost always worth taking; for logos and screenshots with sharp text edges it is more questionable, since JPG artefacts show clearly against flat backgrounds.
When this is the wrong conversion
Avoid this conversion if the image has transparency you need to keep, or if it is a logo, screenshot, or diagram with hard-edged text. Those are exactly the cases where JPG's artefacts are most visible and PNG's compression works best. WebP is often the better answer when you want both small size and transparency.
Frequently asked questions
- What happens to transparent areas?
- JPG doesn't support transparency, so any transparent or semi-transparent pixels in your PNG are flattened to white in the converted JPG.
- Will the file get smaller?
- Usually yes — JPG's lossy compression typically produces a significantly smaller file than the equivalent PNG, especially for photos.
- Are my images uploaded to a server?
- No, conversion happens locally in your browser using the Canvas API. Nothing is sent anywhere.
- Does this lose image quality?
- Yes, JPG is lossy, so converting from PNG introduces some compression artifacts — usually not visible at high quality settings, but not pixel-perfect either.
- Is this good for screenshots?
- Usually not. Screenshots have sharp text edges where JPG artefacts are clearly visible. PNG or WebP suit them better.