Media

Responsive Image Builder

Responsive image markup is easy to get subtly wrong. This builder inspects source dimensions, creates a width ladder and outputs copy-ready picture markup with lazy loading and async decoding.

No image inspected

/images/hero-480.webp 480w,
  /images/hero-768.webp 768w,
  /images/hero-1024.webp 1024w,
  /images/hero-1440.webp 1440w,
  /images/hero-1920.webp 1920w

This generates implementation code and naming plans. Pair it with Image Optimizer to create the actual files at each width.

runtime

Browser-local execution

Inputs stay inside the current tab unless you copy, download or explicitly export.

memory

Session handoff

Magic Paste can pass input to a target tool through sessionStorage, never through the URL.

control

User-owned state

Favorites, recent tools and workflow history are local browser data you can clear from the browser.

smart handoff graph

Suggested next moves

session handoff ready
sponsor

Fixed native slots for developer products. No third-party tracking, no popups, no layout shift.

Sponsor this tool
01

How to use

  1. 01Inspect a source image or enter a base path.
  2. 02Tune widths, format, alt text and sizes.
  3. 03Copy the srcset or full picture snippet.
02

FAQ

Does it generate the actual resized files?
No. It generates delivery markup. Use Image Optimizer to create the files.
03

Related tools