Optimize · Browser-first processing
Choose target widths, output format and quality, then download a ZIP containing each generated asset and the matching HTML snippet.
Select a supported file or enter the requested values, then run the tool.
This browser tool does not upload the selected source to ImgNimble. Closing or refreshing clears the selected files and generated result from the page.
Common questions
Responsive Image and srcset Generator reads the selected input into browser memory and performs its documented operation on this device. It does not submit the source file to ImgNimble while using this browser-first workspace.
Multiple resized files, a ZIP archive and a srcset example using generated filenames.
The tool does not choose layout breakpoints for you. Confirm that generated widths match the real CSS layout and use accurate sizes attributes.
Responsive Image and srcset Generator validates the selected file before processing. Use JPG, JPEG, PNG, WEBP, GIF, HEIC, HEIF, SVG within the 40 MB per-file limit. Keep an untouched original for comparison.
The Responsive Image and srcset Generator workflow runs in browser memory. ImgNimble does not receive the source file for this local operation; refreshing or closing the page clears the selected input and generated in-page result.
Practical checks
Choose target widths, output format and quality, then download a ZIP containing each generated asset and the matching HTML snippet.
Keep the source, download the Responsive Image and srcset Generator result as a new file, and verify dimensions, transparency, colour, metadata and visual detail before replacing any production asset.