Convert PNG to WebP for smaller file sizes while keeping full transparency support. Great for reducing website load times.
Last updated: August 2026
Up to 26%+
Smaller than PNG
Transparency
Preserved
Batch
Multiple Files
Private
No Uploads
Drop PNG files here or click to browse
Supports .png — all processing stays in your browser
Four steps, all running locally in your browser.
Set your quality first (optional)
The slider runs from 60% to 95%, default 82%. Set it before dropping files if you want one consistent quality across a whole batch.
Drop your PNG files
One file or many at once. Transparency is preserved automatically, it all stays on your device.
Conversion starts automatically
There's no separate convert button. Each file begins converting the moment it's added, and files process independently.
Download
Download a single file directly, or grab every converted file at once as a ZIP.
PNG
WebP (this converter)
For most web images, WebP is the better choice. The file size reduction directly improves page load speed, which affects both user experience and search rankings. The Core Web Vitals guide covers how image format choices affect performance scores in detail.
If you have PNG files with transparent backgrounds — logos, product cutouts, interface elements — your only options for smaller file formats are WebP and AVIF. JPEG does not support transparency and fills transparent areas with white, which breaks any design that relies on a clear background.
WebP supports the same full alpha channel as PNG. A product image with a cut-out background that currently ships as a 200KB PNG can become a 100 to 140KB WebP with near-identical visual appearance and preserved transparency, though since this converter always encodes in WebP's lossy mode, "near-identical" rather than pixel perfect is the accurate way to put it, even at the default quality.
Waiting for a "Convert" button
There isn't one. Conversion starts automatically the instant a file is dropped or selected, so watch the per-file status badge rather than looking for a button to click.
Adjusting quality after files are already converted
The quality slider is only read at the moment a file starts converting. Files that already finished keep the quality they were converted at — moving the slider afterward only affects files you add from that point forward. Set the quality you want before dropping your batch.
Dropping an unsupported file type and assuming it failed silently
This page only accepts .png files. Drop a JPG or another format here and nothing happens at all, no error message, no entry added to the list. If a file doesn't show up after dropping it, check the extension.
Assuming this preserves pixels exactly like PNG does
WebP encoding here always runs in lossy mode, there's no true lossless option exposed. Even a simple flat-color logo undergoes some compression. Raise quality toward 90-95 for graphics where pixel-perfect accuracy matters most.
Expecting the same 26% savings on every PNG
That figure holds up for graphics with a moderate mix of colors. Genuinely photographic PNGs often shrink much further, 40 to 60% or more, since PNG is a poor fit for photos to begin with, while flat-color icons and logos (which PNG already handles efficiently) tend to save less.
Downloading a large batch one file at a time
Once more than one file finishes converting, a "Download all" button appears and packages everything into a single ZIP. No need to click Download on every row individually.
JPG to WebP
Convert JPEG images to WebP, 25 to 34% smaller than equivalent JPEG
PNG to JPG
Convert PNG to JPEG for maximum compatibility when transparency isn't needed
HEIC to JPG
Convert iPhone HEIC photos to JPG, metadata removed automatically
Image Compressor and Editor
Compress PNG and WebP further, crop, resize and watermark
WebP is typically up to 26% smaller than PNG for graphics and images with a moderate mix of colors, at equivalent visual quality. Photographic content converts even further, often 40 to 60% smaller in practice, because PNG's lossless compression is a poor fit for photos to begin with. A genuinely flat-color icon or logo, which PNG already compresses efficiently, tends to see savings closer to the lower end of that range.
At the default quality setting of 82%, the output WebP is visually identical to the original PNG at normal viewing sizes. This converter always encodes in WebP's lossy mode, there's no true lossless option exposed here, so even a flat-color logo undergoes some compression rather than PNG's pixel-perfect guarantee. Raise the slider, which runs from 60% to 95%, toward the top end for graphics where exact pixel accuracy matters most.
Yes. WebP supports a full alpha channel just like PNG. Transparent backgrounds, semi-transparent shadows and layered graphics all convert correctly. This is the key advantage over converting to JPEG, which does not support transparency at all.
Yes, effectively. WebP has been supported by Chrome, Firefox, Safari, Edge and Opera since 2020, covering over 97% of global browser usage. It is safe to use WebP on public websites without a fallback for the vast majority of users.
Use PNG to WebP when the image has a transparent background or semi-transparent areas — logos, product cutouts, icons, UI elements. JPEG does not support transparency and will fill those areas with white. If transparency is not needed and you want maximum compatibility including in older email clients, PNG to JPG is the better choice.
The quality setting is applied to each file at the moment it starts converting, which happens automatically as soon as it's dropped, there's no separate convert button. Moving the slider afterward will not re-encode files that already finished, only files you add from that point on will use the new setting. Set the quality you want before dropping your batch if you need it applied consistently across every file.
No. All conversion happens entirely in your browser using WebAssembly. Your PNG files never leave your device. You can verify this by disconnecting from the internet after the page loads, conversion still works.
Yes. Drop multiple PNG files at once or select them from the file picker. Each file converts independently, so one failure doesn't stop the rest. Download files individually or grab them all at once as a ZIP.
No sign-up. No uploads. Drop your files above and download WebP in seconds.
