PNG vs JPG vs WebP: Which Format Supports Transparent Backgrounds?

You removed a background, hit save — and the transparent area turned white. The cause is almost always the file format. This guide explains which image formats support transparency and when to use PNG, JPG or WebP.

The short answer

• PNG — supports transparency, lossless quality, larger files. The default for cutouts.
• WebP — supports transparency, much smaller files. Best for websites.
• JPG — no transparency, small files. Use for final photos with a solid background.

PNG: the safe choice for transparency

PNG (Portable Network Graphics) stores an 8-bit alpha channel, meaning each pixel can be anything from fully transparent to fully opaque. That's what keeps soft edges — hair, fur, shadows — looking natural. PNG is also lossless: saving it again never degrades quality.

Downside: photographic PNGs can be large, often several megabytes for a full-resolution cutout.

Use PNG for: logos, product cutouts, design assets, anything you'll edit again, and when you're not sure what the destination supports.

JPG: small, universal, but no transparency

JPG (or JPEG) uses lossy compression tuned for photographs. Files are small and every device can open them. But JPG has no alpha channel, so it cannot store transparency at all.

Use JPG for: final images with a solid background — for example a product on white for Amazon, or a headshot on gray for LinkedIn. Pixmoo automatically fills transparent areas with white when you choose JPG, so you never get a black background by accident.

WebP: transparency with small files

WebP is a modern format supported by all major browsers. It supports both lossy and lossless compression and an alpha channel. A transparent WebP is typically far smaller than the equivalent PNG, which helps page speed — a factor in user experience and SEO.

Use WebP for: transparent images on your website or online store. Keep a PNG master copy in case an older app or a print shop needs it.

Side-by-side comparison

	PNG	JPG	WebP
Transparency	Yes	No	Yes
Compression	Lossless	Lossy	Lossy or lossless
Typical file size	Large	Small	Smallest
Browser support	Universal	Universal	All modern browsers
Best for	Editing, logos, masters	Final photos on solid colors	Websites

What about GIF, SVG and HEIC?

• GIF supports only on/off transparency (no soft edges) and 256 colors. Avoid it for photo cutouts.
• SVG is a vector format — ideal for logos and icons drawn as shapes, not for photos.
• HEIC is the iPhone camera format. Convert to JPG or PNG before uploading to most tools.

Which format should you download from Pixmoo?

In Pixmoo's download menu:

• Choose PNG · transparent when you need a cutout to reuse.
• Choose WebP · smaller file when the image goes straight onto a website.
• Choose JPG when you've added a solid background and want maximum compatibility.

Next: learn how to make an image background transparent, step by step.

Frequently asked questions

Does JPG support transparency?

No. JPG has no alpha channel. Transparent areas are filled with a solid color when you save as JPG.

Is WebP better than PNG for transparent images?

For websites, usually yes — WebP supports transparency and is typically much smaller. PNG is still the safest choice for editing and for apps that don't support WebP.

Why is my transparent PNG so large?

PNG is lossless, so large photographic cutouts produce big files. Export as WebP for the web, or resize the image to the size you actually need.