Are my images uploaded anywhere?

No. The conversion runs entirely in your browser using the HTML canvas API. Your images never leave your device.

What happens to transparent areas?

JPG has no transparency channel, so any transparent pixels are flattened onto the background colour you pick (white by default) before encoding.

Will the JPG look exactly like the PNG?

JPG is a lossy format, so at lower quality settings you may see slight artefacts, especially around sharp edges and text. Keep quality high for the closest match; the file will still be much smaller than the PNG.

How much smaller will the JPG be?

For photographic PNGs the JPG is often 60–90% smaller. For flat graphics, screenshots or text-heavy images the saving is smaller and JPG may add visible fringing, so keep quality high or consider WebP.

What quality setting should I use?

The slider runs 10%–100% (default 90%). 90% is a good balance of size and fidelity for most images. Drop to 70–80% only when you need a smaller file and can accept mild softening around edges.

Why is my transparent logo now on a white box?

JPG cannot store transparency, so the transparent area is filled with the background colour. Pick a colour that matches where the image will sit, or keep the image as PNG/WebP if you need transparency.

Can I convert multiple PNGs at once?

Yes. Drop several .png files and they are all converted in one batch with the same quality and background, each with its own download button.

PNG to JPG Converter

Convert PNG to JPG in your browser

This tool converts PNG images to JPG/JPEG entirely in your browser, with a quality slider and a background colour for transparent areas. It’s ideal for shrinking large PNG screenshots and exports, or meeting a JPG-only upload requirement — all without uploading your files.

How it works

Each PNG is decoded and drawn onto an HTML <canvas>. Because JPG has no alpha channel, the canvas is first filled with your chosen background colour (white by default), then the image is drawn on top, so transparent pixels become solid. The canvas is re-encoded with canvas.toBlob("image/jpeg", quality) at the quality you set. Each result shows the original and new file size.

Example

A 2.1 MB screenshot.png at 90% quality typically becomes a ~280 KB screenshot.jpg — roughly −87% — visually indistinguishable at normal viewing size. A transparent logo.png exported at the same settings lands on a white box unless you change the background colour first.

Quality	Look	Relative size
100%	Near-identical	Largest JPG
90% (default)	Imperceptible loss	Much smaller than PNG
70%	Mild softening on edges/text	Smallest

Everything happens locally — your images are never uploaded, stored, or seen by anyone.