Modern formats such as WEBP and AVIF deliver impressive compression without sacrificing quality. Switching from older JPEG or PNG files can reduce file sizes by up to 50% or more.
Our Bulk Image Compressor lets you convert entire folders of images to WEBP or AVIF in one step. Choose your desired output, set the quality level and download everything as a convenient ZIP archive.
Experiment with both formats to find the best balance for your project. Many browsers already support them, leading to faster load times across devices.
Developed by Google and the Alliance for Open Media, respectively, WEBP and AVIF are designed to deliver better image compression than legacy formats. WEBP combines techniques from JPEG and PNG with advanced predictive coding, while AVIF builds on the AV1 video codec to squeeze out even smaller files. Both support transparency and offer a choice between lossy and lossless modes, giving you more control than traditional formats.
If your site is loaded with high-resolution photographs, switching to WEBP or AVIF can dramatically cut bandwidth usage. E-commerce stores, news outlets and photographers benefit most because they host countless pictures. For icons or interface elements, PNG might still be ideal due to universal support. The key is to test each format and keep an eye on visual quality. Our post on smart resizing explains how to pair format conversion with dimension adjustments for maximum speed.
Conversion is simple. Drag your image folder onto the upload area, pick WEBP or AVIF from the drop-down menu and set your preferred quality level. Our server processes each file and returns a neatly packaged ZIP containing the converted images. For bulk jobs, this beats converting files individually in a desktop editor. Plus, your original filenames and folder structure remain intact.
Most modern browsers now support WEBP, and AVIF adoption is quickly growing. However, some older browsers may not display these formats. Use the HTML picture element to define fallback sources. That way, visitors on outdated software still receive a compatible image while everyone else enjoys the smaller files. Check analytics to see which browsers your users rely on, and adjust your strategy accordingly.
Switching to efficient formats reduces page size, which in turn boosts loading speed. Faster pages lead to higher engagement, lower bounce rates and improved search rankings. Google has publicly stated that page speed is a ranking signal, so adopting WEBP or AVIF is a practical SEO move. Combine this with bulk compression techniques to make sure every image is as lean as possible before publishing.
If you publish new photos frequently, consider automating conversion as part of your workflow. Command-line tools and build scripts can run our compressor in batch mode, ensuring consistent output without manual intervention. You can even integrate conversion into your content management system so that uploads are optimized on the fly. This step saves time for large teams and keeps file sizes in check.
Adopting WEBP or AVIF is one of the easiest ways to speed up your site today. Test a small batch of images, compare results and then roll it out across your entire library. Don't forget to monitor analytics afterward to confirm the improvement. For best results, pair format conversion with image resizing and compression, as discussed in our article on smart resizing.
Before committing to a new format, run side-by-side comparisons. Open your images on various devices to ensure color profiles and transparency remain intact. Tools like Lighthouse or WebPageTest can highlight how file size affects real-world load times. Keep a spreadsheet of results so you can track which settings deliver the best balance of quality and speed for your content.
One of our clients runs a photo-heavy travel blog and switched their library of more than 5,000 images from JPEG to AVIF. After the change, average page load time dropped by three seconds, and organic traffic rose by 15%. Another user in the e-commerce space converted product photos to WEBP and saw hosting costs decrease thanks to the smaller image footprint. These success stories show that embracing modern formats can yield measurable benefits. If you're ready to try it yourself, the step-by-step guide above will get you started in minutes.