# New in Chrome 154: iframes that automatically resize themselves to their content

DevFeed: [New in Chrome 154: iframes that automatically resize themselves to their content](<https://devfeed.tech/articles/new-in-chrome-154-iframes-that-automatically-resize-themselves-to-their-content-58294.md>)

Original publisher: [Read original article](<https://www.bram.us/2026/09/23/responsive-iframes/>)

Author: Bramus!

Published: 2026-09-22T22:15:05Z

Content type: article

Language: en

Sources: [Bram.us](<https://devfeed.tech/sources/bram-us.md>)

Topics: [browser](<https://devfeed.tech/topics/browser.md>), [Web Development](<https://devfeed.tech/topics/web-development.md>), [CSS](<https://devfeed.tech/topics/css.md>), [Web platform](<https://devfeed.tech/topics/web-platform.md>), [Firefox](<https://devfeed.tech/topics/firefox.md>), [WebKit](<https://devfeed.tech/topics/webkit.md>)

Tags: [browser](<https://devfeed.tech/tags/browser.md>), [chrome](<https://devfeed.tech/tags/chrome.md>), [chromium](<https://devfeed.tech/tags/chromium.md>), [css](<https://devfeed.tech/tags/css.md>), [demo](<https://devfeed.tech/tags/demo.md>), [embedded](<https://devfeed.tech/tags/embedded.md>), [embedding](<https://devfeed.tech/tags/embedding.md>), [firefox](<https://devfeed.tech/tags/firefox.md>), [iframe](<https://devfeed.tech/tags/iframe.md>), [original-content](<https://devfeed.tech/tags/original-content.md>), [resize](<https://devfeed.tech/tags/resize.md>), [responsive](<https://devfeed.tech/tags/responsive.md>), [safari](<https://devfeed.tech/tags/safari.md>), [social-media](<https://devfeed.tech/tags/social-media.md>), [third-party](<https://devfeed.tech/tags/third-party.md>), [webkit](<https://devfeed.tech/tags/webkit.md>)

## AI overview

Chrome 154 supports responsively sized iframes that adjust to the intrinsic size of their embedded documents. The article explains the two-way opt-in using CSS and a meta tag, demonstrates a multi-step form, and summarizes browser support.

## Source excerpt

Chrome 154 adds support for responsively-sized iframes, letting an <iframe> size itself based on the intrinsic size of its embedded document. This is perfect for seamlessly embedding third-party comment widgets, varying-height social media embeds, or any other type of embed that uses an <iframe>.