JPG to WebP Converter
WebP keeps pictures sharp at a smaller size, which makes websites and apps load faster. Convert JPG and PNG images in your browser, choose the quality or a maximum size, and download them together as a ZIP.
Some application portals and older apps do not accept WebP. For those uploads, keep JPG.
Why use WebP instead of JPG?
Google’s WebP documentation reports that lossy WebP images are 25–34% smaller than comparable JPEGs at the same measured quality. On a page with many pictures, that saves real loading time, especially on mobile data.
All current browsers can display WebP. The format is meant for websites, blogs, online shops and apps that you control. It is not a good choice for forms and portals that only list JPG or PNG as accepted formats.
Choosing the quality setting
Quality 75–85% is a good starting point for photographs: edges stay clean and the file is much smaller than the original. Go lower only for thumbnails or background images where fine detail does not matter. If you have a page-weight budget, switch to Max file size and type a limit in KB; KbSnap finds the highest quality that fits and reduces the pixel size only when quality alone is not enough.
Always compare the result with the original at full size before replacing images on a live website. Large smooth areas such as skies show compression first, and a quality that looks fine in a small preview may show banding when enlarged.
Works in Safari and on phones too
Some browsers, including Safari, cannot save WebP from their built-in image tools. KbSnap includes its own WebP encoder, so the conversion works the same way on iPhone, Android and desktop. The first conversion in a session loads the encoder, which takes a moment; after that, further files convert faster.
PNG images with transparent areas keep their transparency in WebP. JPG has no transparency, so a converted JPG simply stays opaque.
Before you replace images on a website
Convert a copy, never your only original. Keep the source JPGs in a safe folder so you can export again later at a different size or quality. Then check the WebP file size against the original: for very small images, such as icons under a few kilobytes, WebP can occasionally come out slightly larger, and in that case the original is the better choice.
If your site serves images to older browsers or email clients, offer a JPG fallback as well. Most visitors today use browsers that display WebP, but newsletters, document editors and some messaging apps still do not, so test where the picture will actually be shown.
How to use it
- Choose one or more JPG or PNG images.
- Set Quality to about 80%, or switch to Max file size and enter a limit.
- Press Convert to WebP.
- Compare the size shown for each file, then download them one by one or as a ZIP.
Tips for WebP images
- Start at 80% quality and lower it only if the file is still larger than you need.
- Keep your original JPGs; WebP is for the published copy.
- Do not use WebP for forms that list only JPG or PNG as accepted formats.
- Use Maximum width/height to shrink very large camera photos for the web.
Frequently asked questions
How do I convert JPG to WebP?
Choose your JPG or PNG images, keep quality around 80% and press Convert to WebP. Download the results individually or as a ZIP.
Is WebP smaller than JPG?
Usually. Google reports lossy WebP files 25–34% smaller than comparable JPEGs at equal measured quality. The saving depends on the picture.
Does WebP lose quality?
Lossy WebP, like JPG, discards some detail to save space. At 75–85% quality the difference is hard to see for most photos.
Can I set a maximum file size?
Yes. Switch to Max file size and enter the limit in KB. KbSnap lowers quality, and the pixel size only if needed, to fit.
Does it work in Safari and on iPhone?
Yes. KbSnap includes its own WebP encoder, so it does not depend on what the browser can save.
Will forms and portals accept WebP?
Many do not. Check the accepted formats first and keep JPG for those uploads.
Are my images uploaded?
No. Images are processed by your browser on your device and never sent to KbSnap or anyone else.
Related tools
Lossless PNG that keeps transparent areas.
WebP to JPG →Make downloaded WebP images upload-friendly.
PNG to JPG →Smaller files from screenshots and scans.
HEIC to JPG →Convert iPhone photos to JPG.
Image Compressor →Compress any image to a KB limit.
Helpful guides
- iPhone Photos Rejected? HEIC vs JPG and How to Fix It — Why application portals reject iPhone photos, how to convert HEIC to JPG in seconds, and the camera setting that stops the problem for good.
- Reduce Photo Size in KB on Your Phone (Android & iPhone) — A step-by-step way to shrink a phone photo to 20KB, 50KB or 100KB for an online form without making it blurry — and why the obvious shortcuts fail.