WebP Compressor & Converter Online
Convert and compress images to WebP format right in your browser. Shrink image payload by up to 35% with Google WebP technology.
Or test with sample images:
Modern WebP Image Optimization
The Tocompress WebP Compressor enables you to convert and compress existing JPG, PNG, and camera photos into Google’s high-efficiency WebP format directly in your web browser.
WebP delivers substantial file size reductions (25%–35% lighter than JPEG at identical visual quality) while maintaining full support for alpha channel transparency and 24-bit color. Adopting WebP across your website directly improves Google PageSpeed scores, cuts bandwidth expenses, and speeds up Largest Contentful Paint (LCP).
How to Convert and Compress to WebP
Drag and drop any JPG, PNG, or AVIF image into the compressor.
Set quality between 75% and 82% (or enable WebP Lossless for graphics).
Slide the real-time comparison divider and download your lightweight .webp asset.
When Should You Use WebP Format?
Website Production Assets
Blog featured banners, hero images, and landing page illustrations seeking optimal Core Web Vitals scores.
Transparent Photos
E-commerce product cutouts with shadows where lossy photo compression plus alpha transparency produces files 60% lighter than PNG.
Mobile Web Applications
Progressive web apps where minimizing network payload over cellular 4G/5G connections improves user retention.
Quality and File Size Tradeoffs in WebP
WebP’s VP8-based predictive block coding produces a smoother artifact degradation profile than JPEG. When JPEG is compressed too aggressively, harsh 8x8 block boundaries appear; WebP instead exhibits gentle, natural-looking smoothing.
A quality setting of 78%–82% in WebP typically yields a file 30% smaller than MozJPEG at 80%, with virtually indistinguishable visual sharpness on desktop and mobile displays.
✓ WebP Optimization Best Practices
- Set quality between 78% and 82% for photographic web content.
- Use WebP Lossless mode when compressing line art, diagrams, and sharp UI logos.
- Ensure CMS upload settings (e.g. WordPress 5.8+) support direct WebP serving.
- Always resize pixel dimensions to match display containers before conversion.
✗ Common WebP Mistakes to Avoid
- Using WebP for professional CMYK commercial printing workflows (WebP is RGB-only).
- Setting quality to 100% lossy (which produces larger files than WebP lossless).
- Re-encoding low-quality degraded JPGs into WebP (cannot restore already lost detail).
- Forgetting to declare width and height attributes in HTML image tags.
WebP Compression Frequently Asked Questions
What is WebP and how does it compress images?
WebP is a modern web graphics format developed by Google based on the VP8 video codec. It uses spatial block prediction to predict pixel values from neighboring blocks, encoding only the residual difference for superior compression efficiency.
How much smaller are WebP files compared to JPG and PNG?
WebP lossy images are typically 25% to 35% smaller than comparable JPEG images at identical visual quality. WebP lossless images are on average 26% smaller than optimized PNG files.
Does WebP support transparent backgrounds?
Yes! WebP supports full 8-bit alpha channel transparency in both lossy and lossless modes, combining the small file weight of JPEG with the transparency capabilities of PNG.
Are WebP images supported across all browsers?
Yes. Universal browser support for WebP exceeds 97.5% worldwide, including full compatibility across Chrome, Safari, Firefox, Edge, Opera, and mobile platforms.
Can I convert JPG or PNG files to WebP with Tocompress?
Yes! You can drop any JPG, PNG, or AVIF image into this tool, and Tocompress will convert and compress it into an optimized WebP file directly in your browser.
Does Tocompress upload my images to convert them to WebP?
No. The WebP encoder runs entirely in client-side WebAssembly inside your browser memory. Your files are never uploaded or transmitted to any server.