Optimising images is a no-brainer if you care about website speed, SEO, or user experience. WebP, developed by Google, delivers superior compression without noticeably sacrificing quality — a win-win for performance and aesthetics.
The best part? All modern browsers now fully support WebP. You can also take it a step further with AVIF, the next-gen format offering even better compression — and yes, most of the tools below support that too.
Here are five excellent free online WebP converters that make switching to modern formats quick and painless.
1. TinyPNG
TinyPNG has been my trusty companion for image compression for a long time. Initially renowned for its PNG and JPEG optimisation, it’s now embraced WebP and AVIF formats. The interface is delightfully simple — drag and drop, select “Convert my images automatically”, and let it work its magic. For WordPress users, their plugin offers seamless integration, allowing the optimisation of up to 100 images monthly for free.
2. Squoosh
Developed by Google, Squoosh stands out for its versatile features in image optimisation, including WebP conversion. Its real-time preview functionality lets users fine-tune compression settings, striking the perfect balance between image quality and file size. Squoosh’s simplicity and effectiveness cater to a wide range of users, offering an excellent platform for image optimisation.
3. BIRME
BIRME, an acronym for Batch Image Resizing Made Easy, excels in bulk image resizing and offers WebP conversion as part of its toolkit. This online tool streamlines the process for those dealing with extensive image libraries. BIRME’s user-friendly interface and batch-processing capabilities make it a practical choice for projects requiring efficient image conversion.
4. Bulk Resize Photos
BulkResizePhotos is all about speed and privacy. Operating entirely in your browser, it ensures your images never leave your device. The tool excels in rapid batch conversions, offering options to resize, compress, and convert to WebP or AVIF. It’s my go-to when I need quick results without compromising on privacy.
5. ShortPixel
ShortPixel’s online tool is a powerhouse for image optimisation. Beyond converting to WebP or AVIF, it offers intelligent compression that maintains image quality. The online tools allow you to drag and drop (or select) up to 50 files, and I have found this to have better compression than Tinypng generally. This has become my go-to image compression tool, replacing Tinypng.
Their plugin integrates seamlessly for WordPress users, automating the optimisation process and even serving images via their CDN for enhanced performance. It’s a comprehensive solution for those serious about site speed.
Final Thoughts
Each of these free online WebP converters has its strengths — whether you want granular control, lightning-fast bulk conversion, or just a smooth drag-and-drop experience. Adding them to your image workflow can drastically reduce page load times and improve Core Web Vitals.
👉 Want WordPress integration? TinyPNG and ShortPixel have free plugins.
👉 Need speed and privacy? BulkResizePhotos runs 100% in-browser.
👉 Like fiddling with settings? Squoosh gives you all the knobs and sliders.
No matter your needs, there’s a tool here that’ll save you time and bandwidth. Your users (and your PageSpeed score) will thank you.