Does converting PNG to WebP keep transparency?
Yes. Unlike converting to JPG, this tool correctly preserves your PNG's alpha channel when encoding to WebP - transparent areas stay transparent in the output file.
PNG to WebP Converter Free - Keep Transparency
Convert PNG to WebP for faster website loading. Next-gen format that keeps transparency.
About this tool
Google PageSpeed Insights and Lighthouse both flag PNG images as an opportunity to switch to a next-gen format like WebP, since WebP typically compresses more efficiently than PNG at a comparable visual quality. This tool converts your PNG to WebP at a fixed 90% quality setting - a lossy encode, not lossless - while correctly carrying over any transparency in the source image.
The conversion happens entirely in your browser; nothing is uploaded to a server.
WebP typically produces smaller files than PNG while still supporting a full transparency channel, which makes it the more web-friendly choice for logos, icons, and UI assets that need to stay lightweight without losing transparency.
How to Use PNG to WebP Converter
Upload PNG
Select the PNG image you need to compress.
WebP Conversion
We convert large PNGs into lightweight WebP format instantly.
Verify Quality
Ensure transparency and sharpness remain intact.
Save WebP
Download the web-ready image for better SEO performance.
Common Workflows
PageSpeed Optimization
Convert PNG assets to WebP to resolve a Lighthouse 'serve images in next-gen formats' flag.
UI Asset Pipelines
Convert icon sets and interface graphics to WebP while keeping their transparent backgrounds.
Logo Delivery
Shrink a logo file for faster header loading without losing its transparent background.
Batch Conversion
Use the Bulk Image Converter to convert an entire folder of PNGs to WebP at once.
Further Compression
Run the WebP output through the Image Compressor if it still needs to be smaller.
Best For
- Keeps transparency - unlike PNG to JPG, converting to WebP preserves your PNG's alpha channel correctly.
- This conversion is lossy at a fixed quality setting, not lossless - fine for most web use, but keep the original PNG if you need a pixel-perfect archival copy.
- Pairs well with the Image Compressor or Bulk Image Converter for site-wide image optimization work.
Examples
Convert a flat-color logo PNG to WebP
Source File
logo.png - 512x512, transparent background, 24.6 KBResult
logo.webp - 512x512, transparent background preserved, about 10.7 KB (about 57% smaller)This is a lossy conversion at a fixed 90% quality - the transparent background carries over correctly, unlike converting the same file to JPG. Savings vary by image; a busier photo compresses differently than this flat-color example.
Use Cases
Fixing a Lighthouse or PageSpeed 'next-gen format' warning
Convert the flagged PNG assets to WebP to address the audit recommendation directly.
Shrinking transparent UI assets
Convert icons, logos, and interface graphics to WebP when you need the transparency of PNG but the smaller footprint of a modern format.
Reducing page weight on an image-heavy site
Convert a batch of product or blog images from PNG to WebP to cut total page size and improve load time.
Common Mistakes
Problem
Assuming the conversion is lossless
Solution
This tool encodes WebP at a fixed 90% quality - a lossy setting. It's visually close to the original for most images, but it isn't a pixel-perfect copy. Keep the source PNG if you need a lossless archive.
Problem
Not checking WebP support on the target platform
Solution
WebP displays correctly in all current major browsers, but some older software, email clients, and legacy CMS platforms still don't support it. Confirm the destination accepts WebP before replacing your only copy of an image.
Problem
Expecting a quality slider
Solution
The quality is fixed at 90% with no user control. If you need a different quality/size tradeoff, that isn't currently available on this page.
Tips & Best Practices
Keep the source PNG for anything that needs future edits
Because this is a lossy, one-way conversion, hold on to the original PNG if you'll need to re-edit or re-export the image later.
Use Bulk Image Converter for whole folders
Converting one file at a time is fine for a single logo, but for a full image library, the Bulk Image Converter handles many PNGs at once and returns a ZIP.
Verify transparency after converting
Open the WebP result over a colored or checkerboard background to confirm the transparent areas came through as expected before replacing the original file everywhere it's used.
Limitations
Lossy only, fixed quality
The tool always encodes at 90% quality with no lossless mode and no quality slider.
One file at a time
This page converts a single PNG per run. For batches, use the Bulk Image Converter.
No animated PNG (APNG) handling
This tool converts static PNG images. Animated PNG frames are not specifically handled.
Comparisons
PNG to WebP vs PNG to JPG
Both reduce file size, but they differ on transparency and on how universally the output format is supported.
| PNG to WebP | PNG to JPG | |
|---|---|---|
| Transparency | Preserved - alpha channel carries over | Lost - transparent areas fill with solid black |
| Typical file size | Usually smaller than an equivalent-quality JPG | Smaller than PNG, but generally larger than the WebP equivalent |
| Compatibility | Supported by all current major browsers; a few older tools lag | Universally supported everywhere |
Which should you use?
Choose WebP when the image needs to stay transparent or when you're optimizing specifically for web performance. Choose JPG when maximum compatibility matters more than transparency or a slightly smaller file.
FAQs
The two questions almost everyone asks are whether transparency survives the conversion and whether the result is lossless - both are answered directly below.
Is this a lossless or lossy conversion?
Lossy. The tool encodes WebP at a fixed 90% quality setting, not a lossless mode. Visual quality stays close to the original for most images, but it isn't a pixel-perfect copy - keep the source PNG if you need a lossless archive.
How much smaller will my WebP file be?
It depends on the image - a flat-color logo or icon typically shrinks by roughly half, while a detailed photo-like PNG can shrink more or less depending on its content. There's no fixed percentage that applies to every file.
Is the PNG to WebP conversion done on my device?
Yes. CoditTools processes the conversion entirely in your browser using JavaScript. Your files are never uploaded to any server.
Can I convert multiple PNG files to WebP at once?
Yes. Use the Bulk Image Converter tool on CoditTools to convert multiple PNG files to WebP in a single batch and download all results as one ZIP file.
Do all browsers support WebP?
All current major browsers - Chrome, Firefox, Safari, and Edge - display WebP images correctly. A small number of older software versions, email clients, and legacy platforms still don't support it, so keep a JPG or PNG version on hand if you're unsure about the destination.
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