Free image converter
Convert images between JPG, PNG and WebP in your browser. Convert a whole batch in one go, choose the quality, and decide what happens to transparent areas. Files are processed on your device and never uploaded.
How to convert images
- Add your images: JPG, PNG, WebP, GIF and BMP, plus AVIF if your browser can open it. Up to 100 at a time.
- Choose the format to convert to: WebP, JPG or PNG.
- Set the quality for JPG or WebP. The default of 85 keeps results very close to the original.
- Converting transparent images to JPG? Pick the background colour for the transparent areas.
- Download each file or click Download all (ZIP).
JPG vs. PNG vs. WebP (vs. AVIF): which to use
| Format | Best for | Transparency | Notes |
|---|---|---|---|
| JPG | Photos that must open anywhere | No | Lossy. Opens in every app, browser and email client. |
| PNG | Logos, icons, screenshots, sharp-edged graphics | Yes | Lossless. Large files for photos. |
| WebP | Almost every image on a website | Yes | Usually smaller than JPG and PNG at similar quality. Works in all current major browsers. |
| AVIF | Photos where every kilobyte counts | Yes | Often smaller than WebP. Browsers can’t create AVIF files natively, so this tool opens AVIF but doesn’t save it yet. |
For a website, WebP is the practical default: current versions of Chrome, Edge, Firefox and Safari all support it (browser support on Can I use). Keep JPG when a file must open in older software or email, and PNG when you need lossless, pixel-perfect graphics.
What happens to transparency
PNG and WebP keep transparent areas. JPG can’t store transparency, so transparent pixels are filled with the background colour you choose, white by default. Without that step, many converters turn transparent areas black.
Animated GIFs are converted from their first frame only, and you’ll see a note when that happens. GIF isn’t offered as an output, because browsers can’t create GIF files and WebP does the job better on a website.
Using WebP on WordPress
- Upload WebP directly. WordPress has supported WebP uploads since version 5.8, so converted files go straight into the Media Library.
- No theme changes needed. Themes and page builders display WebP like any other image.
- Plugin or convert yourself? An optimization plugin or CDN can serve WebP copies of your JPGs automatically. Converting before upload avoids storing two versions of every image.
- Measure the result. Test a page in PageSpeed Insights before and after switching to WebP.
Image converter FAQ
Is WebP supported by all browsers?
All current versions of Chrome, Edge, Firefox and Safari support WebP. Only very old browsers, such as Internet Explorer, don’t.
Does converting to JPG remove transparency?
Yes. JPG has no transparency, so those areas are filled with the background colour you pick. Convert to PNG or WebP to keep transparency.
Can I convert a whole folder?
Yes. Open the folder in the file picker, select all files (Ctrl+A on Windows, Cmd+A on Mac) or drag them into the box, up to 100 at a time. Download the results as one ZIP.
Why can’t I convert to GIF?
Browsers can’t create GIF files, so a browser-based tool can’t honestly offer it. For still images on a website, WebP or PNG is a better choice anyway.
Is converting lossless?
Converting to PNG is lossless. JPG and WebP are lossy, and the quality slider controls how much detail is kept. At the default of 85 the result is very close to the original.
Related tools
- Image Compressor: make converted files even smaller with a quality slider.
- Image Resizer: resize to exact pixels or web presets.
Want a faster WordPress site?
Modern image formats are one part of a fast site. My WordPress speed optimization service covers the rest, from LCP and CLS to INP. Get in touch to start with an audit.