Private image conversion
Convert PNG to JPG
Make JPG copies of PNG files when a screenshot, scan, or photo-like image is too large for an upload limit. Transparent areas are flattened to white because JPG cannot store transparency.
Files
No files selected yet.About PNG and JPG conversion
PNG is excellent for screenshots, diagrams, and graphics with hard edges, but it can be unnecessarily large for photo-like content. Many forms, support portals, and email workflows have strict file size limits, and exporting a PNG as JPG is often enough to fit under those limits.
This conversion is lossy. The worker decodes the PNG, paints a white background for any transparent pixels, draws the image to an OffscreenCanvas, and exports a JPG at a fixed quality setting. It is a practical sharing format, not a way to preserve every exact PNG pixel.
Use PNG as the source when the original is what you already have, but keep a copy if transparency or crisp lossless editing still matters. Once exported to JPG, transparent regions and repeated lossy saves cannot be recovered from that JPG file.
Does this upload my files?
No. Everything on this page runs locally in your browser, so your files are never uploaded to a server. Close the tab and nothing is left behind. It even keeps working if you go offline after the page loads.
This is true for every tool on this site. Curious how that works? Read how browser-side processing works.
FAQ
Will PNG to JPG reduce file size?
Often, especially for screenshots with photo content or large images that do not need transparency, but simple flat graphics may not shrink as much.
What happens to transparent PNG areas?
They are flattened onto a white background before JPG export, because the JPG format cannot save transparent pixels.
Is PNG to JPG lossless?
No. JPG uses lossy compression, so tiny color and edge differences can appear compared with the original PNG.
Should I use this for screenshots?
Use it when the screenshot is too large for a form or email. Keep PNG if exact text edges or transparent UI artwork are more important than size.