Why PNG to WebP is a strong web optimization
WebP keeps transparency while usually reducing transfer size compared with PNG. That makes it one of the most practical upgrades for UI assets, logos, overlays, and transparent illustrations on websites.
Convert PNG to WebP
Convert PNG to WebP when you want smaller transparent web images without giving up alpha support. This is one of the easiest ways to speed up image-heavy pages and UI assets.
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Drag & drop your images here
or click to browse, or paste (Ctrl+V)
Supports HEIC, HEIF, WebP, PNG, JPG, AVIF, BMP
When WebP beats PNG clearly
WebP is usually the better target when the file is going to a browser, design system docs, or a modern CMS. You get transparency support with a much better chance of smaller payloads.
When PNG still makes sense
PNG is still useful when a workflow explicitly requires PNG files or when a downstream tool does not handle WebP reliably. In those cases, compatibility may outweigh the performance gain.
Known limitations
Before converting, note these constraints:
- Output behavior follows format capabilities (for example transparency support and lossy/lossless rules).
- Final file size depends on source image content and selected quality settings.
- If compatibility is critical, choose broadly supported targets first (typically JPG).
How to Convert PNG to WebP
1
Drag and drop your PNG files into the box above, or click to browse.
2
Files are converted to WebP instantly in your browser.
3
Adjust the quality slider to balance size vs. quality, then download.
Frequently Asked Questions
Why convert PNG to WebP?
WebP keeps transparency and produces smaller files than PNG in standard web delivery workflows.
How do I convert PNG to WebP online?
Upload the PNG, keep WebP selected, then download the result. This is a common workflow when you want smaller transparent assets for websites, UI images, or landing pages.
Will transparent backgrounds stay transparent?
Yes. WebP supports alpha transparency, so transparent regions are preserved.
Why convert PNG to WebP for websites?
PNG is often much larger than WebP for the same transparent asset. Converting to WebP keeps transparency while reducing transfer size, which helps page speed.
Should I use PNG or WebP for transparent images?
Use WebP when the image is going on a modern website and you want a smaller file. Keep PNG when a workflow specifically requires PNG or when maximum compatibility with older tooling matters more than transfer size.
Why is the output file sometimes larger than the original?
The output file becomes larger for three clear reasons: (1) Converting from a lossy format (JPG, WebP) to a lossless format (PNG) preserves every pixel, so file size increases in exchange for zero quality loss. (2) AVIF uses the AV1 codec, which has encoding overhead for small or simple images. AVIF delivers its strongest compression gains on high-resolution photos, with 20–50% better compression than JPEG in benchmark comparisons. (3) If the source is already heavily compressed, re-encoding does not reduce size further. PicShift uses industry-leading WASM encoders (MozJPEG, OxiPNG, libwebp) to produce the smallest possible output at your chosen quality. In compress mode, PicShift automatically keeps the original file when compression increases size. Learn more: https://picshift.app/docs/size-increase-explainer