JPG → WEBP · LOCAL IMAGE CONVERSION
Convert JPG to WebP. Keep it local.
Turn a photo or a whole folder into WebP files with PixelPress. Add your images, choose WebP and check the result. Your originals stay untouched and your pictures are not uploaded.
FOUR STEPS
From your JPG to a finished WebP file
Install PixelPress first. Get the Windows version from the Microsoft Store or find the Ubuntu and Debian packages on the product page. PixelPress converts your images directly on your computer.
Get PixelPress ↗Add files or a folder
Use Files or Folder to select your JPGs. On Windows you can also drag them into the app. Enable Include subfolders when images are stored in nested folders.
Choose a separate output folder
Choose a destination outside your source folder. Start with a fresh output folder for each run so you can compare results without replacing an earlier export.
Enable WebP and set quality
Enable WebP and disable AVIF for this run. Keep the default quality for your first test, or try 80 as a starting point. The value is an encoder setting, not a percentage of preserved detail.
Convert and check the result
Start conversion, then use Open output. Compare file sizes and inspect the image at its intended display size and at 100% zoom. Keep your original JPG for future changes.
A MEASURED EXAMPLE
Same dimensions. Less to download.
We converted the JPG illustration below to WebP without resizing it. The result is 47% smaller in this one example. Other images and settings can produce very different results.
Choose quality by looking at the picture
Test a face, a detailed landscape and an image with a smooth gradient. Compare the smallest file that still looks right with a higher-quality export. File size alone does not tell you whether the result is good.
Photos and fine detail
Look at hair, foliage and textured surfaces at 100% zoom. If they become soft or blotchy, increase quality and export again from the original JPG. Repeatedly converting a compressed result adds avoidable losses.
Text and screenshots
Check small lettering and sharp borders. A screenshot saved as JPG may already contain artefacts. If a PNG source is available, compare a lossless export rather than compressing the damaged JPG again.
Convert folders and keep the originals
Keep source images and exports in separate folders. Test the most demanding pictures before converting a mixed collection. Use fresh output folders while adjusting settings; replace a previous PixelPress run only when you deliberately want to update its results.
Local conversion avoids uploading private client images to a converter. It does not automatically guarantee that every metadata field is removed. Inspect metadata separately before publishing sensitive material.
Read about output folders ↗The result is not what you expected?
- No files were created
- Check that WebP is enabled, the source images open correctly and the destination is writable. Include subfolders if your pictures are not directly inside the selected folder.
- Colours look different
- Compare both files in the same viewer. Colour profiles and viewing software can affect appearance. Keep the source and investigate the colour handling before converting the whole batch.
- The website still loads the JPG
- Conversion creates a new file; it does not update your website. Change the image URL in your CMS or HTML and check which file the browser actually requests.
Questions about JPG to WebP
Are JPG and JPEG different formats?
No. JPG and JPEG are two file extensions for the same image format. Both can be converted to WebP.
Does WebP restore lost image quality?
No. Detail already lost in a JPG cannot be restored by conversion. Lossy encoding may remove more detail, so compare your export with the original.
Why is my WebP larger than the JPG?
A JPG may already be strongly compressed. A high WebP quality setting can produce a larger file. Keep the smaller version that meets your quality needs.
Can I just rename .jpg to .webp?
No. Renaming only changes the filename. An image converter must encode the file as WebP. Open the result to check it.