JPG (Joint Photographic Experts Group (JPEG)) and WEBP (Web Picture format) are built for different jobs. JPG is typically used for photos, social media, email attachments, while WEBP is best for fast-loading websites. Converting lets you open, share or upload your files wherever WEBP is expected.
How to use the JPG to WEBP converter
- Add your JPG filesClick “Choose Files” or drag and drop them into the box. You can add many files at once — or paste a file with Ctrl+V.
- Choose WEBP and adjust settingsWEBP is selected automatically. Optionally open Settings to change quality, size or background.
- Convert and downloadPress “Convert”. Your WEBP files appear instantly — download them one by one or all together as a ZIP.
JPG vs WEBP
JPG Joint Photographic Experts Group (JPEG)
JPG is the most widely supported photo format. It uses lossy compression that discards detail the eye barely notices, producing small files that open on every device, browser and app — ideal for photographs, less so for text or line art.
- Compression
- Lossy
- Features
- No transparency
- Origin
- 1992, JPEG committee
- Best for
- Photos, social media, email attachments
WEBP Web Picture format
WebP is a modern format from Google that produces files 25–35% smaller than JPG or PNG at similar quality. It supports transparency and animation, but some older software, editors and upload forms still reject it.
- Compression
- Lossy or lossless
- Features
- Supports transparency and animation
- Origin
- 2010, Google
- Best for
- Fast-loading websites
Why use ConvertMathly?
Files are processed on your device and never uploaded. Close the tab and they are gone.
No account, no daily cap, no queue and no watermark — convert as much as you want.
No waiting for uploads or downloads: results are ready as fast as your device can process them.
Windows, Mac, Linux, Chromebook, iPhone and Android — any modern browser, nothing to install.
Frequently asked questions
How do I convert JPG to WEBP?
Add your JPG files above, make sure WEBP is selected and press Convert. The WEBP files are ready to download a few seconds later — no installation or account required.
Will converting JPG to WEBP reduce quality?
WEBP uses lossy compression, but at the default 90% quality the difference is practically invisible. Raise the quality slider to 100% for maximum fidelity or lower it for smaller files.
Is there a file size or daily limit?
No. Since everything runs locally, there are no daily caps, queues or file size limits beyond what your device can handle.
Are my JPG files uploaded to a server?
No. ConvertMathly converts files entirely inside your web browser using JavaScript and WebAssembly. Your files never leave your computer or phone, which makes it safe for private photos and documents.
Can I convert multiple JPG files at once?
Yes — add as many files as you like. They are converted one after another and you can download everything in a single ZIP.