Convert PNG to WebP with smart lossless/lossy detection & up to 80% compression
WhiskFile PNG to WebP is a free online tool to convert PNG to WebP with smart lossless/lossy detection & up to 80% compression. Files are processed entirely in your browser — nothing is uploaded to any server.
Quick Answer
Convert PNG to WebP with smart lossless/lossy detection & up to 80% compression. WhiskFile's PNG to WebP is free, works in your browser, and requires no account. Your files never leave your device — all processing happens locally.
Upload PNG files
Select or drag and drop your PNG images. Each file is analyzed to detect photos vs graphics.
Choose compression mode
Select Lossless (pixel-perfect, ~26% smaller) or Lossy (up to 80% smaller). Smart detection recommends the best mode.
Review smart recommendation
Check the smart mode recommendation badge. Click 'Switch' if you want to override the auto-detected lossless or lossy mode.
Adjust settings
In Lossy mode, set quality with presets (Web 70%, Balanced 80%, High 90%) or fine-tune slider. Optionally resize images.
Preview compression savings
Review per-image savings badges showing compression percentage (e.g. ↓32%) before downloading.
Download WebP
Save individual WebP files or download all as a ZIP archive.
Max file size: 50 MB (free) · 500 MB (paid). Processing time: ~1s on average. Batch processing: upload multiple files at once.
PNG to WebP runs entirely in your browser — no software to install. Works on any device with a modern browser.
Windows & Mac
Chrome, Firefox, Edge, Safari
iPhone & Android
Safari, Chrome mobile
iPad & Tablets
Full touch support
Unlike server-based tools that upload your documents, WhiskFile processes everything locally in your browser. Your files never leave your device — not even temporarily.
No upload required
Files are processed in your browser — nothing is sent to any server
100% private
No server storage, no data collection, no third-party access
Works offline
Once loaded, works without an internet connection
“Batch-converting RAW exports to web formats saves me hours every week. The quality is excellent.”
Carlos Ruiz
Photographer
“Resizing and converting images for different platforms used to be tedious. Now it's drag and done.”
Priya Sharma
Social Media Manager
Help us improve by sharing your experience with PNG to WebP.
Client-side processing
This tool now runs entirely in your browser — files never leave your device.
Result preview & sharing
Preview your processed file before downloading, and share results via a secure link.
Yes. WebP is supported by all modern browsers (Chrome, Firefox, Safari, Edge) and most image editors including Photoshop, GIMP, and Figma.
Lossless WebP preserves every pixel exactly — ideal for screenshots, logos, and diagrams (typically ~26% smaller than PNG). Lossy WebP discards imperceptible details for much greater compression (up to 80% smaller), ideal for photos.
When you upload a PNG, we analyze its color complexity. Images with many unique colors (photos) get a Lossy recommendation. Images with fewer colors (graphics, screenshots, logos) get a Lossless recommendation.
Absolutely. WebP supports full alpha channel transparency just like PNG. Your transparent backgrounds, overlays, and icons remain intact.
No. All conversion happens entirely in your browser using JavaScript. Your files never leave your device, ensuring complete privacy and security.
Animated PNGs are detected automatically. Currently, only the first frame is converted to WebP. Browser-based animated PNG to animated WebP conversion is not yet supported.
Lossless WebP is typically 26% smaller than PNG. Lossy WebP can be up to 80% smaller while maintaining visual quality nearly identical to the original.
Yes. Select or drag and drop multiple PNG files. All are processed in parallel in your browser with individual progress. Download all as a ZIP.
Absolutely. WebP images are significantly smaller than PNG, reducing page load time, improving Core Web Vitals, and boosting Google PageSpeed scores.
Yes. Use quality presets (Web 70%, Balanced 80%, High 90%) or the fine-tune slider for precise control. Lossless mode always preserves 100% quality.
No. WhiskFile runs entirely in your browser. No downloads, plugins, or accounts required. Works on Windows, Mac, Linux, and all mobile devices.
Yes. Use scale presets (Original, 75%, 50%, 25%) or the custom slider (10%–200%) to resize images while converting to WebP.
Yes. WhiskFile processes everything in your browser using JavaScript. No files are uploaded to any server. Your images remain completely private.
Yes. PNG to WebP on WhiskFile is completely free with no account required. Free users get 7 tasks per day with files up to 50 MB. There are no watermarks on any plan. Pro plans ($4.99/month) unlock unlimited tasks, 500 MB files, batch processing, and API access.
Yes. PNG to WebP works on any device with a modern browser — iPhone, Android, iPad, tablets, Chromebooks, and desktop computers. No app download required. The interface adapts to your screen size automatically.
PNG to WebP accepts PNG files as input and produces WEBP output. The maximum file size is 50 MB on the free plan (500 MB for Pro users). There are no page count limits.
See how WhiskFile compares to other PDF tools on features, pricing, and privacy.
Chromebook & Linux
Any modern browser
