WebP is Google's modern image format, and it's one of the easiest wins in web performance. At the same visual quality, a WebP is typically 25–35% smaller than JPEG and far smaller than PNG — while still supporting transparency. This tool both compresses existing WebP files and converts PNG/JPEG into WebP, entirely in your browser.
Lossy vs lossless WebP
- Lossy WebP competes with JPEG — ideal for photographs, with the smallest files.
- Lossless WebP competes with PNG — ideal for graphics that need exact pixels and transparency.
WebP also supports an alpha channel in both modes, so you get transparency without paying PNG's size penalty.
Browser and platform support
Every modern browser — Chrome, Edge, Firefox, Safari (14+), and all current mobile browsers — supports WebP. It's safe to serve site-wide today. For maximum coverage on very old browsers, keep a JPEG/PNG fallback via the <picture> element.
Tip: Converting your largest PNGs and JPEGs to WebP is one of the highest-impact changes you can make for website speed and Core Web Vitals.
Converting PNG or JPEG to WebP
Just drop a PNG or JPEG into the tool and choose WebP as the output. Transparency is preserved from PNGs, and you control the quality of the result.
How to compress or create a WebP
Drop in your image
Add a WebP to compress it, or add a PNG/JPEG and choose WebP as the output format to convert it.
Set quality and format
Pick WebP output and choose a quality level. For most photos, 75–82% gives excellent results at a fraction of the size.
Download the WebP
Save your optimized .webp file, or batch-convert a folder and download a ZIP.
🔧 Try Compress Image — free, private, no upload
Drop your files and get smaller versions in seconds. Quality slider, format switching, and batch processing — all in your browser.
Open Compress Image →Frequently asked questions
Is WebP better than JPEG?
For the web, usually yes — WebP is about 25–35% smaller at the same visual quality and also supports transparency. JPEG remains useful for maximum compatibility with very old software.
Can I convert PNG or JPEG to WebP here?
Yes. Drop in a PNG or JPEG, choose WebP as the output format, and download the converted file. Transparency from PNGs is preserved.
Do all browsers support WebP?
All modern browsers do, including Safari 14+. For legacy browsers, use a
Does WebP support transparency?
Yes, in both lossy and lossless modes — unlike JPEG, which has no alpha channel.