Visually preview or download HTML and CSS code in ChatGPT's new 'GPT-4o with canvas' model and UI.
HTML Viewer for ChatGPT Extension
This tool adds an eyeball icon to the canvas interface for HTML/CSS code canvases, allowing you to instantly visualize the code displayed in the canvas without the need to save or test locally.
With a single click, the extension renders your code in a pop-up iFrame, saving you time and effort while making the editing process smoother and more efficient. No more tedious back-and-forth between saving files and checking your work—just quick, in-browser previews.
You can also quickly download to an HTML file with the download button.
**Important: Please read the caveats and limitations below**
Instructions:
1. Generate new HTML/CSS code, or view already generated canvas code, in \"ChatGPT-4o with canvas\" at chatgpt.com or chat.openai.com.
2. When the canvas opens automatically, or you open it manually on existing canvas code, the preview eyeball icon button should appear at the top-right of the canvas within a second or two.
3. Press the preview button to visually view your HTML/CSS code.
4. Press the X or the Esc key to close the preview pop-up.
Caveats and limitations:
- You must be in the \"ChatGPT-4o with canvas\" model/UI.
- HTML/CSS code canvases must start with '' or the preview button won't appear, as there's no point to visually preview any other programming languages.
- Some CSS styling may not look quite right or exactly perfect in preview, possibly due to iFrame limitations or differences. If something looks a little off, it's recommended to always download the HTML and open in your browser before asking ChatGPT for changes on minor appearances based only on what you see in preview.
- References to external CSS and scripts, as well as inline scripts, will not work **in the preview iFrame** due to content security policies. You can however use the download button to quickly save to an HTML file and then open it in your browser, and this limitation would not apply.
- You need to Ctrl + click a link, or link button, in your HTML preview to navigate to it in a new tab. Normal clicking links in your HTML doesn't work, as it is blocked by CSP.
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Source Manifest.json
How to download and manually install HTML Viewer for ChatGPT extension for Chrome
Looking for a way to install HTML Viewer for ChatGPT extensions for Chrome, you can search for them in the Chrome Web Store, clicking the "Add to Chrome" button, and following the straightforward process.
However, you may need to install HTML Viewer for ChatGPT extensions manually, this article outlines two simple methods to effortlessly install HTML Viewer for ChatGPT extensions, whether they come as unpacked folders in compressed formats like .zip or as .crx files.
Method 1: Download HTML Viewer for ChatGPT extension and manually install through Drag &Drop
If you ever need to manually install a HTML Viewer for ChatGPT extension for Chrome, don't worry, it's a simple process. Just follow these easy steps, and you will have your extension ready to use in no time.
Step 1: Download the HTML Viewer for ChatGPT Extension by clicking the "Download CRX" button on the website.
Look for the HTML Viewer for ChatGPT extension you wish to install. Go to the website and download the HTML Viewer for ChatGPT extension package, which is usually a .CRX file and comes in a zipped file. Here ".crx" file is the format for HTML Viewer for ChatGPT extension that contains all the data.
Step 2: Extract &Arrange Files
Once the file is downloaded, extract that file into its own folder. Similarly, give that extension files a permanent home. In other words, keep it in a folder that you don't accidentally delete it because these files will be needed to make that extension work.
Step 3: Go to the Chrome Extensions Page
Open Google Chrome and in the address bar, type chrome://extensions; it will open the Google Chrome extensions page. Make sure that "My extensions" is selected in the sidebar.
Step 4: Drag and Drop the Extension
Now, go to the folder where you extracted the HTML Viewer for ChatGPT extension and drag &drop the extension file from there anywhere onto the extension page within Google Chrome.
Step 5: Complete the Installation
Once you drag and drop the extension file, follow the steps that Google Chrome takes you through. Similarly, if the extension file is of .crx file format, you will be required to review the permissions and then add the extension.
Now, you can manage that added extension as you would like to with any other Chrome extension that you added through Chrome Webstore. Its icon will also appear in the Google Chrome Menu on the right side of the address bar once you activate it.
Method 2: Download HTML Viewer for ChatGPT extension for Chrome and install in Developer Mode
This is another method to install HTML Viewer for ChatGPT extension manually, but the twist is that here, you install by enabling the developer mode option provided in Google Chrome. This mode is commonly used for testing extensions or running unpublished tools.
Step 1: Download the HTML Viewer for ChatGPT extension file
Select and download the HTML Viewer for ChatGPT extension by clicking the 'Download CRX' button on the website.
Step 2: Extract the downloaded contents
Convert the file to a ZIP file if it is in CRX format then extract the HTML Viewer for ChatGPT extension zip file or folder that you downloaded. Make sure you extract it using the same folder name and keep it safely in another folder, so you don't delete it by mistake. The extracted folder will be needed to keep your HTML Viewer for ChatGPT extension running.
Step 3: Open Chrome Extension Setting Page
In the address bar of Google Chrome, type chrome://extensions and open the Chrome Extension Page.
Step 4: Enable Developer Mode
After opening the Chrome Extension page, look at the top right side, and you will find the toggle option of "Developer mode."Simply enable that developer mode option.
Step 5: Load the Unpacked Extension
Once you enable the developer mode option, you will see the menu of Load Unpacked, Pack Extensions and Update. From that, select the option "Load unpacked."
Step 6: Select the Extension Folder
Once the pop-up opens upon clicking Load unpacked, select the HTML Viewer for ChatGPT extension directory and click on the "Select Folder "button.
Step 7: Confirm and Install
After you select an extension folder of a Google Chrome extension you're installing manually, confirm its installation for the final time and let the installation complete.
Conclusion
Here we've made a step-by-step guide on How to manually install HTML Viewer for ChatGPT extension in 2 ways. We hope this guide proves helpful.
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