Penpal simplifies communication with iframes, workers, and windows by using promise-based methods on top of postMessage.

Open-source modern iframe resizer

Event base communication made easy with a promise-based API wrapping postMessage.

A simple and free dashboard for displaying your favourite sites using iframes

A zero dependency package to effortlessly create responsive component previews in documentation using real media queries. Frameport dynamically generates iframes containing your HTML/CSS/JS, mimicking natural device viewports to test responsiveness, without any build steps or dependencies.

A web page where you can input a link and it will fill an iframe. Other features include light and dark modes, navigation buttons, autocomplete links (beta), and a drop-down menu of recommended sites. (navigation buttons and autocomplete links [beta] feature are only currently available on the archive site version.)

Online iframe editor

Two-way communication between a parent window and iframes or window instances. Supports promised based requests and observable-based streams

Display two websites side by side, then share them!