How to Convert PNG to JPG Online (and When You Should)

By the CompressPicOnline team · Updated October 19, 2026 · All guides

PNG files are great for sharp graphics, but they can be huge. A single screenshot or photo saved as PNG may be several megabytes, which is too big for many forms, emails and websites. Converting PNG to JPG can cut the size by 80% or more. This guide explains how to convert PNG to JPG for free, what changes during conversion and when you should leave a PNG alone.

PNG vs JPG in one minute

PNG is lossless: it keeps every pixel exactly and supports transparent backgrounds. JPG is lossy: it throws away detail you are unlikely to notice in return for much smaller files, and it has no transparency. For photographs, JPG is almost always the better choice. For logos, icons and text-heavy graphics, PNG stays sharper. You can read a deeper comparison in our JPG vs PNG vs WebP guide.

Why people convert PNG to JPG

An upload form accepts only JPG or has a small size limit.
A screenshot or scan is too large to email.
A website is slow because photos were saved as PNG.
A phone is running out of storage.
A print shop or app does not accept PNG files.

Step-by-step: convert PNG to JPG

Open the free image compressor.
Press Select Images and choose one or many PNG files.
Pick a quality. Use 92% for the best clarity or 80% for a good balance of size and quality.
Press compress. Each PNG is converted into a JPG with the size savings shown next to it.
Download one by one or all together as a ZIP.

What happens to transparency?

JPG cannot store transparent areas. During conversion, transparent pixels are filled with white, so a logo with a transparent background will appear on a white square. This is perfect for forms and documents with a white page, but unsuitable if you plan to place the logo over a coloured background. Always keep your original PNG as the master copy if you need transparency later.

How much smaller will the file be?

For photographs, expect the JPG to be 5 to 10 times smaller than the PNG. For screenshots, the saving is usually 50% to 80%. For flat graphics with only a few colours, the saving can be small, and edges may look slightly fuzzy. If the JPG would be larger than the PNG, the tool keeps your original so you do not lose anything.

Choosing the right quality

90% to 92%: nearly identical to the PNG for photos; best for printing and portfolios.

80%: excellent for web pages and email; typical sweet spot.

60% or lower: use only when a strict size limit forces you to, such as a 100KB form upload.

When you should keep PNG

Logos and icons that need a transparent background.
Screenshots with small text where every edge must stay crisp.
Images you will keep editing, because JPG loses a little quality each time it is saved.
Diagrams with flat colours and thin lines.

Converting many PNG files at once

Batch conversion saves a lot of time. Select your whole folder, convert everything together and download the ZIP. Output files are numbered and renamed with a -compressed.jpg ending, so your originals are never overwritten. On older phones, work in groups of 20 to 30 images to keep the browser responsive.

Troubleshooting

The background turned white. That is how transparency is handled. Keep the PNG if you need it.

Text looks fuzzy. Use 90% or higher for screenshots, or keep the PNG.

The file did not shrink much. Your PNG may already be small or consist of flat colours. Try a lower quality setting.

Using converted JPGs on your website

If you are replacing PNG photos on a website, upload the new JPG files, update the image links and keep the same descriptive file names so you do not lose search visibility. Test the page afterwards and compare loading speed before and after. Many site owners find that switching photographic PNGs to 80% JPG shaves several megabytes off key pages. Keep PNG only for logos, icons and screenshots that genuinely need sharp edges or transparency, and your pages will feel noticeably faster.

Printing and sharing converted files

Print shops and online photo services almost always accept JPG, so converting your PNG files first prevents rejected orders. Use 90% quality or higher for prints, and check the resolution that the service recommends. For sharing with friends or clients, 80% is a good balance of clarity and size, and the recipient can open the file on any device without extra software.

Frequently asked questions

Is converting PNG to JPG free?

Yes. There is no signup, limit or watermark.

Are my images uploaded?

No. Everything runs in your browser, so the files stay on your device.

Can I convert JPG back to PNG with the same quality?

No. Lost detail cannot be recovered, so keep the original PNG when quality matters.

👉 Open the free image compressor