Smaller files, faster pages, full transparency — convert PNG to WebP for modern web delivery
Drop PNG files here
or browse files
Up to 10 files · 50 MB each
Click "Upload PNG" or drag files onto the upload area. Select multiple files at once for batch conversion.
Files are converted to WebP right away. Single files are typically ready in under two seconds; larger batches take a few seconds more.
Click "Download WebP" to save your file. Batch conversions can be downloaded as a ZIP archive. No signup or email needed.
WebP supports full alpha channel transparency — the same as PNG — but produces files that are typically 25–35% smaller in lossless mode. You don't have to choose between transparency and performance.
WebP supports both modes. Use lossless for graphics and icons where pixel-perfect quality matters; use lossy for photos and content images where a smaller file size matters more.
WebP handles multi-frame animation at a fraction of the file size of GIF — useful for UI animations, product demos, and looping banners.
Smaller image files mean faster LCP scores, lower bandwidth costs, and better PageSpeed ratings. For image-heavy pages, switching PNG assets to WebP is one of the highest-impact optimizations available.
Convert up to 10 PNG files to WebP in one session — practical for processing a full set of web assets, product images, or UI graphics at once.
Completely free to use. No watermarks, no conversion limits, no account required.
PNG files are lossless and large. WebP gives you the same transparency support — full alpha channel, smooth edges, logos that sit cleanly on any background — at significantly smaller file sizes. Converting your PNG graphics and icons to WebP is one of the most effective ways to reduce page weight without changing how your images look or behave.
Google's PageSpeed Insights explicitly recommends serving images in WebP format. For sites carrying large PNG assets — hero graphics, product images, UI illustrations — converting to WebP reduces file sizes by 25–35% compared to lossless PNG, which directly improves Largest Contentful Paint (LCP) scores and overall page load times, especially on mobile.
If you have a series of PNG frames — a UI animation, a product rotation, a looping banner — converting to animated WebP produces a file that's typically 64% smaller than the equivalent GIF, with better color quality. Animated WebP plays automatically in all modern browsers without JavaScript or a video player.
No software to install. Works directly in your browser on any device — desktop, tablet, or phone.
Convert up to 10 PNG files to WebP in a single session. Files are processed in parallel and downloadable individually or as a ZIP.
Supports PNG source files up to 50 MB — enough for high-resolution graphics, detailed UI assets, and large product images.
Choose lossless WebP to preserve every pixel from the source PNG, or lossy for maximum file size reduction. Quality 80–85 is a reliable default for most web images.
All uploads use HTTPS encryption. Files are permanently deleted from servers after conversion. GDPR compliant.
Works on all modern mobile browsers. No app download needed.
PNG and WebP both support full transparency and are widely used for web graphics. The key difference is efficiency: WebP produces smaller files than PNG at equivalent or better visual quality, and adds animation support that PNG doesn't have.
| Aspect | PNG | WebP |
|---|---|---|
| Compression | Lossless (Deflate) | Both lossy and lossless |
| Transparency | Yes (full alpha channel) | Yes (full alpha channel) |
| Animation | No | Yes |
| Typical File Size | Medium to large (200 KB – 20 MB) | Smaller — typically 25–35% less than lossless PNG |
| Color Depth | 24-bit (RGB) or 32-bit (RGBA with alpha) | 24-bit (RGB) or 32-bit (RGBA) |
| Best For | Logos, icons, UI graphics, design assets | Web images, e-commerce graphics, UI assets, web animations |
| Browser Support | All browsers | All modern browsers (Chrome 23+, Firefox 65+, Safari 14+, Edge 18+) |
For web delivery, WebP is a straight upgrade from PNG — smaller files, same transparency, with animation support added. Keep PNG for design workflows, editing, and any context where lossless archiving or print delivery is the goal.
PNG is the standard for web graphics, logos, and UI assets — lossless, transparent, and widely supported. But it's not the most efficient format for web delivery. WebP was built specifically to address that: it supports the same full alpha channel transparency as PNG, produces files that are typically 25–35% smaller in lossless mode, and adds animation support on top. For most web use cases, switching PNG assets to WebP is a straightforward performance improvement.
The main reason is file size. PNG files are large — lossless compression is efficient, but not as efficient as WebP's more modern algorithm. For a website carrying a lot of PNG assets — logos, icons, product graphics, UI illustrations — converting to WebP reduces total page weight meaningfully. Google's PageSpeed Insights flags PNG use and recommends WebP as part of its Core Web Vitals guidance. For pages where LCP is image-driven, this conversion often has a direct, measurable impact on scores.
Transparency support is what makes WebP a genuine PNG replacement for web use. Unlike converting to JPG (which drops transparency entirely), WebP preserves your alpha channel completely. Logos still have clean edges, UI overlays still work, product cutouts still sit correctly on any background — just at a smaller file size.
Animation is the third reason. If you're producing looping animations from PNG frames, animated WebP is significantly smaller than GIF — typically 64% smaller — with better color quality. It plays automatically in all modern browsers without any special handling.
**File size:** In lossless mode, WebP is typically 25–35% smaller than PNG at equivalent quality. In lossy mode, the savings are larger — often 50–70% — with no visible quality difference at reasonable quality settings. For a web page with 20 PNG assets, that's a meaningful reduction in total page weight.
**Transparency:** Both formats support full alpha channel transparency. The conversion doesn't change how transparency works — logos, icons, and UI assets with transparent backgrounds look exactly the same in WebP as they do in PNG.
**Compression mode:** WebP gives you a choice. Lossless mode preserves every pixel exactly — the right setting for icons, logos, and graphics where sharpness matters. Lossy mode achieves much smaller files at the cost of some imperceptible quality — the right setting for photos and content images on web pages.
**Animation:** PNG has no animation support (APNG exists but isn't universally supported). WebP handles multi-frame animation natively, at file sizes far smaller than GIF.
**Browser support:** All modern browsers support WebP. If you need to support very old browsers (IE 11, Safari 13 and below), serve PNG as a fallback using the HTML picture element.
**Use lossless mode for logos, icons, and UI assets.** These images have sharp edges, text, and limited color palettes where lossless compression is the right trade-off. Lossless WebP is smaller than PNG while preserving every pixel.
**Use lossy mode for photos and content images.** Quality 80–85 is a reliable default — files are significantly smaller than PNG with no visible quality difference on screen. For hero images or anything where fine detail matters, try 85–90.
**Keep your original PNGs.** WebP is excellent for web delivery, but PNG remains the better format for editing, print, and archiving. Keep source files for anything you might need to re-export or modify later.
**Check browser support for your audience.** All modern browsers support WebP, but if your analytics show significant traffic from older browsers, use a picture element with PNG fallback in your HTML.
**Web developers and site owners** converting logo files, icon sets, UI graphics, and product images to WebP as part of performance optimization work — often after a PageSpeed Insights audit flags PNG usage.
**E-commerce teams** converting product photography and category images. PNG is common in product photo workflows, but WebP delivers better performance for storefront pages where image load speed affects conversion rates.
**Designers delivering web-ready assets** who export from Figma or Photoshop as PNG and need to convert before handoff to developers or direct upload to a CMS.
**Developers building image processing pipelines** automating conversion of user-uploaded PNG files to WebP for storage and delivery efficiency.
For web delivery, WebP is the better format for PNG assets — smaller files, same transparency, with animation support added. PortImg converts your PNGs to WebP in seconds, directly in your browser. No software, no account, no watermarks. Upload your files and download WebP that's ready to serve.