Responsive web image builder

Export several widths of the same picture and copy the matching HTML srcset.

On your device · No account

Privacy details

Responsive web image builder processes your input in this browser. Inputs and results are excluded from analytics. Recent tools save tool names, visit counts and last-visit times. Saved tools store only their names. Draft saving is optional and stays on this device; delete saved text with the draft controls. Loading text from a URL is optional and contacts that server; its URL and your IP address are visible to the server. An optional “Use in” action keeps a handoff in this tab. The next tool removes it on arrival and ignores it if more than a minute has passed.

Copy link includes the inputs you choose to share in the address. Anyone with that link can reopen them. Files and generated results are excluded. Password and key tools share settings only.

Choose an image

Widths, separated by commas

Variant to download

Your preview

Preparing preview…

Reset reloads the tool with its starting values and releases open files and device controls. Saved drafts stay on this device until you delete them.

Links include your inputs and settings. Anyone with the link can see them, so leave out private text. Files and generated results are left out; random draws run again.

Keyboard shortcuts

Updated 2026-09-20

Using the responsive web image builder

Enter a list of widths, then choose each width to export. Heights follow the source proportions. The suggested srcset uses the same numbered file names and width descriptors; replace the image description before publishing.

Next: Color picker from image

A worked example

The 640 × 360 sample becomes 320 × 180 at the default first width. A 640-pixel variant stays 640 × 360.

Before you use the result

PNG, JPEG and WebP inputs are decoded by your browser. Animated files use their first frame. Color profiles can affect displayed colors; exports are rendered pixels, not the original metadata.

Next: Image resizer

Cite this page

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ToolOctopus. “Responsive web image builder.” Updated 2026-09-20. https://tooloctopus.com/responsive-web-image-builder.

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