Convert Image Formats
Convert JPG, PNG, and WebP images to another image format. Multiple images can be converted at once.
Your images are not uploaded to a server. All conversion is performed locally in your browser.
Drop images here
or
Add images to convert them automatically to the selected format.
Conversion results
Converted images will appear here.
About image format conversion
Convert JPG, PNG, and WebP images to any of these three formats without changing their pixel dimensions. Mixed input formats can be processed together.
How to use
- Add one or more images.
- Choose JPG, PNG, or WebP as the output format.
- For JPG or WebP, choose a quality if needed.
- Download each result or all results in a ZIP file.
About each format
JPG
Often suitable for photographs. It does not support transparency, so transparent areas are filled with white when converting to JPG.
PNG
Supports transparency and is often useful for interface graphics and illustrations. Its file size can be larger.
WebP
Works with photographs and illustrations, supports transparency, and is convenient for web use.
Transparent areas
When transparent PNG or WebP images are converted to JPG, transparent areas become white because JPG does not support transparency. PNG and WebP output preserve transparency where possible.
About file size
Format conversion does not always make a file smaller. PNG output can be larger, while WebP can be smaller; results depend on the image content and its existing compression.
Your images are not uploaded
Images are decoded and converted in your browser. nicolet.jp does not receive or store your image files.
FAQ
Which input formats are supported?
JPG, JPEG, PNG, and WebP.
Which formats can I convert to?
JPG, PNG, and WebP.
Can I convert multiple images at once?
Yes, including a mixture of supported formats.
What happens to PNG transparency when converting to JPG?
Transparent areas become white.
Is transparency preserved in PNG and WebP output?
Yes, where possible.
Can I choose JPG or WebP quality?
Yes. Choose 95, 85, 75, or 65.
Does PNG have a quality setting?
No quality control is shown for PNG in this tool.
Do image dimensions change?
No. Pixel dimensions are preserved.
Will the file always become smaller?
No. Some output formats can increase file size.
Are images uploaded?
No. Processing takes place locally in your browser.
Is EXIF metadata preserved?
Complete metadata preservation is not guaranteed when an image is re-encoded.
Are animated WebP images supported?
No. This tool is intended for still images.