PNG to WebP converter – compress without losing transparency

Content last reviewed:2026-09-07

Convert PNG graphics to WebP for smaller files with full transparency support. Add files, set quality, and download.

Files in queue

Add PNG files on the left to start converting to WebP.

Why convert PNG to WebP?

PNG is a lossless format that produces relatively large files — ideal for editing but heavy for web delivery. WebP typically produces files 50–70% smaller than PNG at comparable visual quality, making it one of the most effective image optimizations for websites.

WebP supports both lossy and lossless compression modes, alpha transparency, and millions of colors. It is supported by all modern browsers: Chrome, Firefox, Safari 14+, and Edge. Lossy WebP at quality 80 is visually indistinguishable from lossless PNG for most images.

If transparency is important, WebP preserves it from the original PNG. Google PageSpeed Insights recommends serving images in next-gen formats like WebP for better Core Web Vitals scores.

All processing happens locally in your browser — nothing is sent to any server. No registration, no limits, no watermarks.

How to convert PNG to WebP

Upload your PNG file
Drag and drop your PNG image onto the converter area or click to browse your device. You can add multiple files at once for batch conversion.
Set the quality
The Set WebP quality slider takes values from 60 to 95 percent, default 80. A lower value gives a lighter file, a higher one keeps more detail. Then click Convert.
Download WebP
The Download button next to a file saves it on its own, and Download all packs all finished files into one ZIP archive. With a single finished file no archive is made, the file downloads directly.

When should you convert PNG to WebP?

Website optimization
PNG files are large — a single screenshot can be 2–10 MB. Converting to WebP reduces size by 50–70% while preserving transparency. Google PageSpeed specifically recommends WebP for better Core Web Vitals scores.
Every recipient has to open the file
Email clients and older graphics programs do not display WebP files yet. For a photo going by email or into such a program use the PNG to JPG converter.
Online shop
Product galleries and thumbnails in WebP load faster, and the transparent background of a packshot stays in the file.
The file is still going back for editing
Every further save in a lossy format removes some detail. When the image is still going into an editor, keep the original PNG file and convert only the final version.

What makes this PNG to WebP converter different?

Complete privacy
Your PNG files are processed entirely in your browser. Nothing is uploaded to any server – your images stay on your device at all times.
Many files at once
Add any number of PNG files, each up to 100 MB. The converter processes them one by one and shows the status of each.
Quality slider
The Set WebP quality slider from 60 to 95 percent, default 80. Next to every file you see the size before and after conversion, and under the list the total for the whole queue.
Download in one archive
The Download all button packs all finished files into one ZIP archive, so you do not have to approve a dozen downloads one after another.

PNG vs WebP – format comparison

Feature	PNG	WebP
Lossy compression	—	✓
Lossless compression	✓	✓
Transparency (alpha channel)	✓	✓
Animation support	—	✓
Web browser support	All browsers	Chrome 32+, Firefox 65+, Edge 18+, Safari 14+
Color depth	8/16-bit	8-bit (16.7M)
Compact file size	—	✓
Metadata (EXIF)	—	✓

Quality settings – what to choose when converting PNG to WebP?

The quality slider lets you set a value from 60% to 95%. Higher values mean better image quality but larger file sizes.

80% (default) – a good balance for most use cases. The visual difference compared to lossless PNG is virtually imperceptible while file size drops by 50–70%.
85–90% – for product photography and portfolios where quality is the priority.
60–70% – when minimizing file size is the priority, e.g. thumbnails in category grids.

At 80% quality, WebP produces results that are visually indistinguishable from lossless PNG for most photographic content. For pixel-perfect accuracy, use WebP lossless mode if available.

How much does a file weigh after converting PNG to WebP?

Three test files went through this converter at the default settings, that is at 80 percent quality: a photo of 1280 × 1659 pixels, a screenshot of 1920 × 1060 pixels and a 512 × 512 pixel icon with a transparent background. Sizes are given exactly as the tool counts them: kilobytes and megabytes of 1024, with the same rounding.

File	Dimensions in pixels	PNG	WebP	Change
Photo	1280 × 1659	3.90 MB	576.9 KB	6.9 times smaller
Screenshot	1920 × 1060	233.2 KB	50.4 KB	4.6 times smaller
Icon with transparency	512 × 512	13.0 KB	3.40 KB	3.8 times smaller

Our own measurement from 6 September 2026 in a Chromium-based browser. The more flat areas, the smaller the file; the transparency of the icon was kept.

Convert other files to WebP

JPG to WebP SVG to WebP GIF to WebP BMP to WebP AVIF to WebP HEIC to WebP TIFF to WebP PDF to WebP Base64 to WebP

Convert PNG to other formats

PNG to JPG PNG to BMP PNG to AVIF PNG to GIF PNG to TIFF PNG to PDF PNG to Base64

Content last reviewed: September 7, 2026 · written and checked by the Arteon team

Frequently asked questions about PNG to WebP conversion

Is converting PNG to WebP free?

Yes, this PNG to WebP converter is completely free with no limits. You can convert as many files as you need without registration or watermarks.

Does the converter upload my files to a server?

No. All processing happens locally in your browser using JavaScript and Canvas API. Your files never leave your device, ensuring complete privacy and security.

Will I lose quality when converting PNG to WebP?

Yes, WebP from this converter is saved lossy, at the quality set by the Set WebP quality slider (default 80 percent). At that value the difference is invisible on screen, while at 60 percent fine detail starts to blur. The encoder has no lossless mode.

Can I convert multiple PNG files at once?

Yes, the converter supports batch conversion. You can add multiple PNG files and convert them all to WebP simultaneously. Use the batch download option to save all converted files at once.

Do all browsers support WebP?

Yes. Chrome, Firefox, Edge and Opera have displayed WebP for years, and Safari since version 14 on macOS Big Sur (2020) and iOS 14.

What is the maximum file size?

Each file may be up to 100 MB; a larger one stops on the list with a message that it is too large. The number of files in the queue is not limited, and large images take longer because the browser decodes them fully into memory.

Does the converter work on mobile devices?

Yes, the converter works on any device with a modern web browser, including smartphones and tablets. The interface adapts to your screen size for a comfortable experience on any device.

How do I download all files at once?

The Download all button packs the finished files into one ZIP archive named png-webp.zip. With a single finished file no archive is made and the file downloads directly.