JPG → WEBP · CONVERT IMAGES LOCALLY
Turn JPG into WebP. On your own computer.
Convert a single photo or a folder of images with PixelPress. Add the files, select WebP and review the export. The original pictures remain unchanged, and nothing is uploaded.
FOUR SIMPLE STEPS
Create a WebP file from your JPG
Start by installing PixelPress. Windows users can get it from the Microsoft Store; Ubuntu and Debian downloads are on the product page. Conversion takes place on your computer.
Get PixelPress ↗Add your pictures
Select JPG images with Files or Folder. On Windows, dragging files into PixelPress works too. Turn on Include subfolders to process pictures in nested folders.
Set a separate destination folder
Save exports outside the source folder. Use a new destination for each attempt to compare results without overwriting a previous export.
Select WebP and choose the quality
Turn WebP on and AVIF off for this export. Begin with the default quality, or try 80. This number controls the encoder; it does not measure the proportion of detail retained.
Run the conversion and review it
Convert the files and select Open output. Compare their sizes, then inspect the pictures at their intended display size and at 100% zoom. Retain the original JPG for later edits.
FILE SIZE COMPARISON
Same dimensions. Smaller download.
The JPG illustration below was converted to WebP at its original dimensions. This particular file became 47% smaller. Different pictures and settings may give quite different results.
Judge quality from the image
Try a portrait, a detailed landscape and a smooth gradient. Compare a small but acceptable file against a higher-quality export. A smaller file is not necessarily a better result.
Photographs and fine textures
Inspect hair, leaves and textured areas at 100% zoom. If details look blurred or patchy, raise the quality and export from the source JPG again. Re-encoding an already compressed export introduces unnecessary losses.
Lettering and screen captures
Examine small text and sharp edges. A JPG screenshot may already show compression artefacts. Where a PNG original exists, try lossless output instead of compressing the damaged JPG further.
Process folders while preserving originals
Store source pictures and exports separately. Before processing a mixed folder, test its most demanding images. Use new output folders while tuning quality; replace a previous PixelPress export only when you intend to update it.
Processing locally means private client pictures need not be uploaded to a converter. It does not guarantee removal of every metadata field. Check metadata before publishing sensitive images.
How output folders work ↗Does the result look wrong?
- No output files
- Make sure WebP is selected, the input pictures open normally and the output folder is writable. Enable Include subfolders for images stored below the selected folder.
- Unexpected colours
- Open both versions in the same viewer. Profiles and viewing applications can change how colours appear. Keep the source and investigate colour handling before processing the full folder.
- Your site still displays the JPG
- Converting creates another file, without changing your website. Update the image address in your CMS or HTML, then check which file the browser downloads.
JPG to WebP questions
Is JPEG different from JPG?
No. JPEG and JPG are alternative extensions for the same format. Either can be converted into WebP.
Can WebP recover lost detail?
No. Converting cannot recover detail already lost in a JPG. Lossy WebP encoding may discard more, so check the export against its source.
Why did my WebP get bigger?
The source JPG may already be heavily compressed. Choosing high WebP quality can create a larger file. Use the smaller version that still looks good enough.
Is changing .jpg to .webp enough?
No. A new extension does not convert the image data. Use an image converter to encode WebP, then open the file to confirm it works.