Convert PNG to JPG
Shrink PNG screenshots and photos by converting them to JPG.
Drop PNG images
Much smaller as JPG. Transparent areas become white.
Guide: Why PNG files are so large3 min read
Why PNG files are so large
PNG is lossless: it reproduces every single pixel exactly as given. For a logo or a diagram, where huge areas share the same color, that compresses beautifully. For a photograph, where practically no two neighboring pixels are identical, there is nothing to compress and the file balloons.
JPG works the opposite way. It throws away detail the eye barely registers and keeps what you actually notice. Converting a photograph that was saved as PNG routinely removes 80 to 90 percent of the file with no difference anyone can see.
Transparency becomes white
JPG has no alpha channel, so anything see-through has to become a solid color. This converter fills it with white, which is what you want in almost every case.
Plenty of tools default to black instead, and that is the reason a logo sometimes comes back with an ugly dark rectangle behind it. If keeping the transparency matters, convert to WebP instead — it stays transparent and still comes out far smaller than the PNG.
Do not convert screenshots
This is the one case where JPG is the wrong answer. Screenshots are full of sharp text edges and flat blocks of color, which is precisely what JPG handles worst. You get faint halos around letters and mottling across solid backgrounds — subtle at first glance, obvious once you zoom.
PNG is the correct format for screenshots, interface mockups and anything containing text. Convert one to JPG only when an upload limit leaves you no choice, and use a high quality setting when you do.
When PNG to JPG is the right move
- A photograph that was saved or exported as PNG by accident — the single most common case, and the one with the biggest payoff.
- An upload form that rejects your file for being too large.
- Email attachments, where a folder of PNG photos hits the size cap almost immediately.
- Anything going to a print service or older software that expects JPG.
Keep your original
The conversion only goes one way. Detail JPG discards is gone permanently, and converting the result back to PNG produces a larger file containing exactly the same damage. If there is any chance you will need the pristine version — for editing, for print, for an archive — keep the PNG alongside the JPG.
Nothing is uploaded
Your images are decoded and re-encoded by your own browser. No file is transmitted, there is no queue and no daily limit, and the tool keeps working with your connection switched off.
Frequently asked questions
Why is my JPG so much smaller than the PNG?
Because the two formats compress in completely different ways. PNG stores every pixel exactly, which is wasteful for a photograph where no two pixels are alike. JPG discards detail the eye barely registers. For a photo saved as PNG, converting to JPG routinely cuts 80 to 90 percent of the file with no visible difference.
What happens to transparent areas?
They become white. JPG has no alpha channel, so transparency has to become some solid color, and white is what you almost always want. Many converters default to black instead, which is why a logo sometimes comes back with an ugly dark box around it. If you need to keep transparency, convert to WebP rather than JPG.
Will my screenshot look worse as a JPG?
Probably, yes. Screenshots are full of sharp text edges and flat color, which is exactly what JPG handles badly — you get faint halos and smearing around letters. PNG is the correct format for screenshots. Convert one to JPG only when a size limit forces your hand.
Can I convert several PNGs at once?
Yes, with no limit imposed. Drop in as many as you like and take them back individually or as a single zip. The only real ceiling is your device memory, since each image is decoded in full while it is converted.
Is the conversion reversible?
No. Once JPG has discarded that detail it is gone, and converting the result back to PNG produces a larger file containing the same damage. Keep the original PNG if you might need it again.