About this tool
Create several widths of one image (WebP, JPG or PNG) plus a ready <img srcset> snippet, downloaded together as a ZIP.
Each requested width is produced by area-average downscaling (never upscaling beyond the original; duplicates are dropped). The snippet lists every file with its width descriptor and sets width and height so the page does not jump while loading.
Example: a 2400 px hero photo with widths 480, 960, 1600 gives three WebP files and one srcset line.
Upload the files next to each other on your site and adjust the sizes attribute to your layout.
Quick steps
- Choose your files — they stay on your device.
- Set the options and check the preview or the test results.
- Download the result. Your original files are never changed.
Files are processed in your browser and are not uploaded to 1CLIK.
FAQ
How does the Responsive Image Generator (srcset) work?
Each requested width is produced by area-average downscaling (never upscaling beyond the original; duplicates are dropped). The snippet lists every file with its width descriptor and sets width and height so the page does not jump while loading.
What should I keep in mind?
Upload the files next to each other on your site and adjust the sizes attribute to your layout.
Are my files uploaded?
No. Everything happens on your device; nothing is deleted or overwritten, and results are new downloads.