PNG to WebP Converter
Convert PNG images to WebP format and reduce file size by 25–35% at the same visual quality. Quality slider, lossless mode, batch conversion up to 20 files.
Drop PNG files here
or click to select · up to 20 files · max 50 MB each
Files never leave your device — processed locally in your browser
What it does
25–35% smaller files
WebP outperforms PNG for most web images. At quality 85, a typical PNG is 25–35% larger than the equivalent WebP.
Quality slider
Choose any quality from 1 to 100. The default (85) balances file size and visual fidelity for most web use cases.
Lossless mode
Toggle lossless WebP for exact pixel-perfect output — useful for screenshots, UI assets, and graphics where precision matters.
Transparency preserved
WebP supports full alpha transparency, so PNG images with transparent backgrounds convert without any white fill.
Side-by-side preview
Compare original and converted images side by side with exact file sizes and percentage reduction shown.
Batch + ZIP
Convert up to 20 PNGs at once and download all WebP files in a single ZIP archive.
How to use PNG to WebP Converter
- 1Upload PNG files
Drag and drop PNG files onto the drop zone, click to browse your file system, or paste an image from your clipboard. Up to 20 files supported.
- 2Adjust quality settings
Set the quality slider (default: 85) for a balance of size and quality. Enable lossless mode for pixel-perfect output with no compression artifacts.
- 3Convert
Click "Convert to WebP". The Canvas API encodes each PNG to WebP using your chosen settings — typically completes in under a second per file.
- 4Download
For a single file, click "Download WebP". For multiple files, click "Download ZIP" to get all converted WebPs in one archive.
When to use this
Optimizing website images
Replace PNG images on your website with WebP to improve page load times and Core Web Vitals scores. A 2 MB PNG logo might compress to 1.4 MB as WebP at quality 85.
Reducing storage for image archives
Convert a folder of PNG screenshots or design exports to WebP to save disk space without losing quality.
Serving next-gen formats
Google PageSpeed Insights flags PNG files and recommends "next-gen formats". Converting to WebP addresses this recommendation directly.
Preparing images for CMS upload
Many CMS platforms have file size limits. Convert large PNG assets to WebP to stay under limits while preserving visual quality.
Common errors & fixes
- WebP looks worse than PNG
- Increase the quality slider. At quality 95+, WebP is visually indistinguishable from PNG for most images. For logos and sharp-edged graphics, try lossless mode.
- WebP is larger than the original PNG
- This can happen with very small PNGs or images with large flat-color areas where PNG's lossless compression is already highly efficient. Lossless WebP will be similar or slightly larger than PNG in these cases.
- Browser does not support WebP
- All modern browsers support WebP (Chrome 23+, Firefox 65+, Safari 14+, Edge 18+). If you need to support older browsers, use the <picture> element to provide a PNG fallback.
- Transparency turned white
- This should not happen — WebP supports alpha transparency. If you see a white background, ensure you are not accidentally setting a background color in the options panel.
Technical details
| Input format | PNG (any bit depth, with or without alpha) |
| Output format | WebP (lossy or lossless) |
| Encoding method | Canvas API canvas.toBlob("image/webp", quality) |
| Default quality | 85 (0.85 in the Canvas API scale of 0–1) |
| Transparency support | Yes — WebP preserves alpha channel from PNG |
| Processing location | Browser (client-side only) |
| Browser support for encoding | Chrome, Edge (Chromium), Opera; Firefox and Safari produce PNG fallback if WebP encode unsupported |
What is PNG?
PNG (Portable Network Graphics) is a lossless raster image format introduced in 1996. It supports 24-bit color with full alpha transparency, making it the standard for logos, UI elements, screenshots, and any image where exact colors and crisp edges matter. PNG compression is lossless, meaning the pixel data is perfectly reconstructed on decode with no generation loss.
The trade-off is file size: PNG files are significantly larger than WebP or JPEG for photographic content. A 1920×1080 screenshot might be 1.2 MB as PNG, 800 KB as WebP at quality 85, and 400 KB as JPEG — though JPEG cannot preserve transparency.
What is WebP?
WebP was developed by Google in 2010 as a single format to replace both PNG and JPEG for the web. It supports lossless compression (for graphics and logos), lossy compression (for photographs), full alpha transparency, and animation.
WebP's lossy mode typically achieves 25–35% smaller files than JPEG at the same perceptual quality. Its lossless mode produces files 25% smaller than equivalent PNGs. All modern browsers support WebP, and it is now the recommended format for web images by Google's PageSpeed Insights and the HTTP Archive Web Almanac.
PNG vs WebP: When to use each
WebP is the better choice for the web in almost every scenario. For photographs and complex images, WebP lossy at quality 80–90 is visually indistinguishable from PNG but 30–50% smaller. For logos and graphics with transparency, WebP lossless is 10–25% smaller than PNG while preserving exact pixels.
PNG retains an advantage in specific cases: (1) you need universal editing tool compatibility — most professional tools have native PNG support; (2) you are delivering images to environments that may not support WebP; (3) you are working in a scientific or archival context where any lossy compression is unacceptable and PNG's lossless guarantee is required.
WebP support across browsers
WebP is supported by all major browsers as of 2021: Chrome 23+ (2012), Firefox 65+ (2019), Edge 18+ (2018), Opera 12.1+ (2012), and Safari 14+ (2020). This covers over 97% of global web users.
For the remaining ~3% using older Safari versions, use the HTML <picture> element to provide a fallback: <picture><source srcset="image.webp" type="image/webp"><img src="image.png"></picture>. Modern build tools like Next.js's Image component and Cloudinary handle this automatically.
Frequently Asked Questions
What is a PNG file?
- PNG (Portable Network Graphics) is a lossless image format that supports transparency and 24-bit color. It is widely used for logos, UI elements, and screenshots. PNG files preserve quality perfectly but are larger than WebP or JPEG.
How do I convert PNG to WebP?
- Drop your PNG files onto the upload zone above, adjust the quality slider if needed (default 85 works well for most images), and click "Convert to WebP". Download individual files or all at once as a ZIP.
Is this PNG to WebP converter free?
- Yes, completely free. No signup, no watermarks, no file limits.
Does the converter upload my PNG files?
- No. All conversion happens in your browser using the HTML Canvas API. Your files never leave your device.
Can I batch convert multiple PNGs to WebP?
- Yes, upload up to 20 PNG files at once. All convert simultaneously and you can download them as a ZIP archive.
Is there quality loss when converting PNG to WebP?
- In lossy mode (the default), there is a tiny quality reduction that is imperceptible at quality 85 or above. Enable lossless mode for zero quality loss — WebP lossless produces pixel-perfect output while still being smaller than PNG.
What is the maximum file size?
- There is no enforced limit, but files over 50 MB may be slow or cause browser memory issues. For web images, most PNGs are well under 10 MB.
Does it work on mobile and offline?
- Yes. The converter is fully responsive and works on mobile browsers. After the page loads once, it continues to work offline since all processing is local.
Related Tools
WebP to PNG Converter
Convert WebP images back to PNG format for universal compatibility. Lossless output, batch support, ZIP download. Free, private, browser-based.
JPG to WebP Converter
Convert JPG/JPEG images to WebP for 25–35% smaller file sizes. Adjustable quality, lossless mode, batch conversion with ZIP output. Browser-only, zero upload.
PNG to AVIF Converter
Convert PNG images to AVIF — the most efficient image format available, up to 50% smaller than JPEG at the same quality. Quality slider, batch mode, no upload.
Image Compressor
Reduce file size without losing visual fidelity.
Image Resizer
Resize images to exact dimensions, percentage, or target file size — 40+ social media presets, bulk mode.