How to Convert PNG to JPG Without Losing Quality

Why Convert PNG to JPG?

PNG is a lossless format — great for preserving detail, but the files are large. A full-screen PNG screenshot might be 3–5 MB, while the same image as a JPG at 90% quality weighs under 500 KB with no visible difference. Common reasons to convert:

• Web performance — smaller images load faster, improving Core Web Vitals.
• Email attachments — many email clients have attachment size limits.
• Storage — large PNG libraries quickly fill disks.
• Compatibility — some older systems and apps handle JPG better than PNG.

The Quality Setting Explained

JPG compression works by discarding high-frequency detail — fine textures, subtle gradients, noise. The quality setting (usually 0–100%) controls how aggressively this happens:

• 92–95% — near-lossless. Excellent for product photos, hero images.
• 85–92% — standard web quality. The sweet spot for most photographs.
• 75–84% — visible artefacts on close inspection. Fine for thumbnails.
• Below 75% — obvious quality loss. Use only where bandwidth is critical.

For images with sharp text or line art (like UI screenshots), stay above 90% — JPG artefacts show up much more in those areas.

Handling Transparency When Converting to JPG

This is the most important thing to understand: JPG does not support transparency. Any transparent pixels in your PNG will be filled with a solid colour in the JPG output. The most common choices are:

• White (#ffffff) — the safe default for most images and documents.
• Black (#000000) — use when the image will be placed on a dark background.
• Custom colour — match the exact background colour of the page the image appears on.

If preserving transparency is essential, consider converting to WebP instead — WebP supports transparency and is even smaller than JPG.

How to Convert PNG to JPG in Your Browser

1. Open the PNG to JPG Converter.
2. Drop your PNG file into the upload area or click to browse.
3. Set the quality slider. Start at 90% and adjust down if the file is still too large.
4. Choose a background colour for any transparent areas.
5. Click Convert to JPG and review the side-by-side preview.
6. Click Download JPG to save the result.

PNG to JPG vs PNG to WebP

If you're converting for the web and all your users are on modern browsers, WebP is often the better choice. At the same visual quality, WebP files are 25–35% smaller than JPG and — unlike JPG — WebP preserves transparency. Read our guide on WebP vs PNG vs JPG for the full breakdown.

Related Conversion Guides

• How to Convert JPG to PNG Online — the reverse conversion and when it makes sense
• How to Convert PNG to WebP for Faster Web Pages — smaller than JPG and keeps transparency
• WebP vs PNG vs JPG: Which Format Should You Use? — full format comparison

Frequently Asked Questions

What quality setting should I use when converting PNG to JPG?

For photographs, 85–92% quality produces output visually indistinguishable from the original PNG while cutting file size by 60–80%. For images with text or sharp edges, use 92–95% to avoid visible artefacts.

What happens to transparent areas when converting PNG to JPG?

JPG does not support transparency — transparent pixels are filled with a background colour. White is the standard default. The PNG to JPG Converter includes a colour picker so you can choose a custom fill colour.

How much smaller will the JPG be compared to the PNG?

For photographs, JPG files are typically 60–80% smaller than PNG at 85–90% quality. For flat-colour graphics and screenshots the saving varies — sometimes PNG is already well compressed.

Can I convert PNG to JPG for free without uploading my image?

Yes. ToolsBox's PNG to JPG Converter runs entirely in your browser using the HTML5 Canvas API — your image never leaves your device. No account needed.