Convert PNG to WebP Online
Transparent product cutouts and interface graphics often need a smaller alternative to PNG for web delivery. WebP can retain their transparent backgrounds while offering adjustable compression; inspect text and edges before using the result.
Your PNG graphic is converted to WebP directly on your device inside this browser tab. No artwork is uploaded anywhere, and the temporary preview is wiped when you close or refresh the tab.
Drop your image here
or choose an image from your device
Accepts PNG images. Transparency is kept, but very large graphics can take a moment to encode.
Match a transparent web asset to its actual display frame with Resize WebP.
Convert PNG images to WebP online while keeping full 8-bit alpha transparency. Savings depend on your source image and quality setting — use the 10–100 slider above to compare exact byte counts in your browser.
Convert PNG to WebP Without Losing Transparency
PNG is the standard format for transparent logos, product cutouts, and UI screenshots, but lossless PNG files are often hundreds of kilobytes or several megabytes on a live web page. Converting PNG to WebP lets you apply efficient compression to the RGB colour channels while keeping a full 8-bit alpha channel for transparent backgrounds and soft drop shadows.
Every conversion runs locally in your browser. TryImager verifies the `RIFF....WEBP` binary header on every output and automatically falls back to a local WebAssembly `libwebp` encoder if your browser's native canvas encoder does not support WebP. Need to go back to PNG for an older editor? Use the WebP to PNG converter.
How to Convert PNG to WebP Online
- Drop a `.png` image onto the workbench above, or click to browse from your device.
- Adjust the WebP quality slider (10–100). Quality 80–90 keeps transparent edges, shadows and typography crisp while trimming excess PNG weight.
- Press Convert and compare the measured before-and-after byte counts and percentage saved in the result panel.
- Click Download WEBP to save the optimized `.webp` file with transparency preserved.
PNG vs WebP: How Much File Size Can You Save?
Actual byte savings vary depending on the source PNG's pixel complexity, dimensions, and the WebP quality setting you choose. For example, a 1200 × 1200 32-bit RGBA product cutout holds 5.76 MB of raw pixel data; lossless PNG must preserve every fine lighting gradient across those 1.44 million pixels, whereas lossy WebP at quality 82–88 compresses the RGB channels while keeping the 8-bit alpha channel (0–255) for smooth drop shadows — see our full PNG vs WebP comparison.
On tiny flat-colour icons or 8-bit indexed badges with only a few solid colours, PNG's lossless DEFLATE compression is already very compact and may save little or nothing. If a WebP encode ever comes out larger than your source PNG, the result panel flags it honestly as 'Larger' so you can keep the original PNG.
Best WebP Quality Settings for Transparent PNGs
- Quality 85–90: best for transparent logos, UI screenshots, and product cutouts where crisp alpha edges and small text matter.
- Quality 75–84: ideal for large photographic PNGs, blog visuals, and decorative overlays where maximum byte reduction is the priority.
- Want to test multiple quality levels side by side? Try the WebP Optimization tool or learn how to keep transparency when converting.
Limitations to know
- WebP conversion in this tool uses lossy encoding at your chosen quality (10–100); keep your source PNG as the editable master copy.
- Very small flat-colour icons may already be smaller as PNG than as lossy WebP.
- Legacy desktop apps or upload forms that reject `.webp` files will require a PNG or PNG to JPG export instead.
Common problems and fixes
The WEBP came out bigger than the PNG.
This happens on small flat-colour icons, where PNG's run-length compression is already near-optimal. Try a lower quality value, or simply keep the PNG for that particular image.
Edges of my logo look slightly fuzzy after converting.
That's lossy compression softening the alpha channel. Raise quality to 90 or higher, or keep hard-edged logos as PNG if pixel-perfect edges matter more than file size.
Will this work if my browser doesn't support native WebP encoding?
Yes. The tool verifies the RIFF/WEBP header of the native canvas encode and automatically falls back to a local WebAssembly WebP encoder (libwebp) when needed. If both paths fail, it reports an explicit error rather than returning a mislabelled file.
What happens to your file
Your PNG and its alpha transparency channel are decoded and re-encoded into WebP inside this tab. Neither the source graphic nor the WebP output is sent to a remote server. Reloading removes the unsaved preview, whereas downloaded files stay on your device. Analytics can receive format and approximate megapixel data, not the artwork or filename.
Transparency is kept, but very large graphics can take a moment to encode.
Full details are in the Privacy Policy.
When not to use this
Leave graphics as PNG when they are going into a design program, slide deck or document editor that cannot import WebP, or when a client has asked for PNG deliverables.
Pixel-art and 1-px icons that must stay mathematically lossless should remain as PNG; this converter's lossy quality slider runs from 10–100 (where 90–95 minimizes edge softening, and the WebP Optimization tuner uses a 50–95 manual range).
Frequently asked questions
Does WEBP keep PNG transparency?
Yes. The alpha channel survives the conversion, which is what makes this the biggest single saving available for cut-outs, logos with soft shadows and overlay graphics.
How large is the saving on transparent images?
Savings vary depending on the source image and quality setting. Large photographic PNG cut-outs and graphics with soft gradients or drop shadows usually shrink significantly, whereas small flat-colour icons may save very little or even come out larger because PNG already compresses runs of identical pixels efficiently.
Is the conversion lossless?
No — this tool uses lossy WEBP with your quality setting, which is where the size reduction comes from. Keep the PNG as your master if you'll be editing the graphic again.
Does WebP support soft 8-bit drop shadows as well as hard cut-outs?
Yes. WebP stores a full 8-bit alpha channel (256 levels of translucency), so feathered edges and drop shadows blend smoothly over any webpage background.