Convert PNG to WebP and Ship Faster Pages

Completely. There are no premium tiers, no per-file charges, and no account walls. The converter runs client-side in your browser, which means there is no server infrastructure cost to gate behind a paywall. Convert as many PNGs to WebP as you need, as often as you need.

Only if you choose lossy compression, and even then the difference is typically invisible at reasonable quality settings. When you convert PNG to WebP using lossless mode, the output is bit-for-bit identical in visual quality to the source. For web assets where pixel-perfect fidelity matters, lossless PNG to WebP is the way to go.

Drop as many files as you want onto the converter and process them all simultaneously. Set WebP as the target format for the entire batch with one click, then download everything as a ZIP. This workflow is designed for site migrations where you need to convert dozens or hundreds of PNGs to WebP in a single session.

WebP supports full alpha channel transparency in both its lossy and lossless modes. When you convert a PNG with a transparent background to WebP, the alpha data carries over perfectly. Semi-transparent pixels, soft edges, and complex masks all render correctly. For UI elements, logos, and product cutouts, WebP is a drop-in replacement for PNG.

Google's compression studies put lossless WebP at roughly 26% smaller than equivalent PNGs on average. With lossy compression at visually comparable quality, the reduction often reaches 60-80%. The actual savings depend on image content — screenshots and graphics with flat color tend to compress better than complex photographs. Run your own PNGs through the converter to see the exact reduction.

WordPress has supported WebP uploads natively since version 5.8 (released July 2021). You can upload WebP files through the media library just like any other image format. Most modern themes and page builders handle WebP without extra configuration. If you are on an older WordPress version or need automatic conversion, plugins like ShortPixel and Imagify can handle it at the server level.

Lossless WebP compresses without discarding any image data — the decoded output is identical to the source, similar to how PNG works. Lossy WebP uses predictive coding to discard imperceptible detail for much greater compression. For PNG to WebP conversion, lossless mode makes the most sense when you need exact fidelity. Lossy mode is better when minimizing file size is the priority and slight quality tradeoffs are acceptable.

In lossless mode, not at all. The pixel data is preserved exactly, so sharpness, edges, and fine text remain identical to the original PNG. Lossy WebP at high quality settings can introduce very subtle softening in areas of fine detail, but it is rarely noticeable at normal viewing sizes. For screenshots, diagrams, or UI mockups where crispness matters, stick with lossless PNG to WebP conversion.

Depends on the use case. For images served to browsers — hero images, thumbnails, product photos, blog graphics — converting PNG to WebP is almost always a net win. The file size savings improve load times without visible quality loss. Keep the original PNGs archived as your master files, and serve WebP to the browser. The one exception is favicons and Open Graph images, where PNG compatibility is still broader across crawlers and social platforms.

The standard approach is the HTML picture element. Wrap your img tag in a picture element and add a source with type="image/webp" pointing to the WebP file. Browsers that support WebP load it; those that do not fall back to the PNG in the img tag. If you are using a CDN like Cloudflare or Fastly, most offer automatic WebP delivery via content negotiation based on the Accept header, so you do not need to change your markup at all.