WebP is Google's image format that delivers 25-35% smaller files than JPEG at equivalent quality. All modern browsers support it, and major platforms like YouTube, Facebook, and WordPress use it by default. Converting your images to WebP is one of the highest-impact optimizations you can make for website speed.

This guide shows how to convert images to WebP using the NexaTools Image Converter — no software to install, no uploads, and full quality control.

Why WebP is the Right Default for Web Images§

Three reasons WebP should be your default web format:

  • Smaller files — WebP lossy compression is 25-35% more efficient than JPEG at the same visual quality
  • Transparency support — unlike JPEG, WebP supports alpha transparency (like PNG, but smaller)
  • Animation support — WebP can replace animated GIFs with significantly smaller file sizes

How to Convert Images to WebP§

  1. Open the converter — navigate to the NexaTools Image Converter
  2. Upload an image — drag an image file or use the file picker. Supported input formats: PNG, JPG, JPEG, GIF, BMP, TIFF, and AVIF
  3. Select WebP output — choose WebP from the format dropdown
  4. Adjust quality — set the quality slider between 1 (smallest file, worst quality) and 100 (largest file, best quality). The recommended default is 80-85
  5. Download — the converted WebP file downloads automatically

Quality Settings Explained§

  • 80-85 — recommended for photographs. Visually lossless in practice, 60-70% smaller than source PNG
  • 90-100 — for images where quality is critical. File sizes approach source JPEG but with better compression
  • 50-70 — for thumbnails or previews where small file size matters more than quality

Lossless WebP§

WebP also supports lossless compression — perfect for logos, screenshots, and graphics with sharp edges. The Image Converter offers both lossy and lossless WebP encoding. Lossless WebP files are typically 20-30% smaller than equivalent PNGs.

Batch Conversion§

While the current version converts one image at a time, each conversion takes only a few seconds for typical web-sized images. For larger batches, convert images sequentially — the tool processes each one independently in your browser's memory.

Serving WebP with Fallbacks§

To serve WebP while supporting older browsers, use the <picture> element:

<picture>
 <source srcset="image.webp" type="image/webp">
 <img src="image.jpg" alt="Description" loading="lazy">
</picture>

Browsers that support WebP download the WebP version. Browsers that don't get the JPEG or PNG fallback. Since all modern browsers support WebP since 2020, the fallback is used in less than 5% of traffic.

Summary§

The NexaTools Image Converter converts images to WebP format directly in your browser — no uploads, no software, and no file size limits. At quality 80, expect 25-35% smaller files than JPEG with identical visual quality.