I just stumbled across http://colorschemedesigner.com/.

It's great for choosing colors and will show you example pages to see what the color scheme would look like applied to a typical page.

Update: the website is now http://paletton.com

Answer from Homer on Stack Exchange
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Liveweave
liveweave.com
HTML, CSS and JavaScript playground - Liveweave
data_object CSS Explorer arrow_outward ยท Palette Color Explorer arrow_outward ยท Polyline Graphics Editor arrow_outward ยท outbox_alt Gen AI by VAIBL arrow_outward ยท build Tools expand_more ยท restart_alt Load "Hello Weaver!" post_add Generate Lorem ipsum... code Format HTML ยท
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CodePen
codepen.io โ€บ timsamoff โ€บ pen โ€บ QQrPPy
Real-Time HTML/CSS Editor
It's a common practice to apply CSS to a page that styles elements such that they are consistent across all browsers. We offer two of the most popular choices: normalize.css and a reset.
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HTML CSS JavaScript
html-css-js.com
HTML CSS JavaScript - Free Online Editors and Tools
Online HTML, CSS and JavaScript editor with instant preview. The HTML-CSS-JS trio are the parts of all websites that users directly interact with. Check out our free online tool collection
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CodeChef
codechef.com โ€บ html-online-compiler
Online HTML / CSS Editor
Welcome to our online HTML / CSS Editor, the perfect platform to run and test your HTML / CSS code efficiently. Our tool makes coding easy for developers of any skill level, whether you're a beginner or experienced.
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Amazon
amazon.ca โ€บ HTML-viewer-source-editor-inspector โ€บ dp โ€บ B09C379WH3
HTML CSS viewer, source code editor, web inspector - App on Amazon Appstore
This is the HTML CSS viewer, source code editor, web inspector application. This HTML viewer is an apparatus that permits web designers to see and alter their work continuously. Everybody can utilize this astonishing application with no charges.
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Chrome Web Store
chromewebstore.google.com โ€บ detail โ€บ html-css-viewer โ€บ ifkcbiegladhdbopjpfmnjhhegbhchmk
HTML CSS Viewer - Chrome Web Store
Page Source Viewer: HTML & CSS Inspector This lightweight extension allows you to instantly view and analyze the HTML and CSS of any webpage. Perfect for developers, designers, and students learning web development.
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HTML Online Viewer
html.onlineviewer.net
HTML Online Viewer
Sample (Alt+6) button puts a sample HTML text into the editor. Clear (Alt+7) button erases the editor text. This website uses cookies for traffic monitoring and running ads. If you don't want to allow cookies, you can disable them in Privacy settings. All input is processed locally (not by a server) and it is thus 100% safe and private. Internal libraries used: jQuery (license) Bootstrap (license) Font Awesome (license) Check other viewers: JavaScript Online Viewer ยท CSS Online Viewer ยท
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Tiiny Host
tiiny.host โ€บ viewer โ€บ css
CSS Viewer - Easily View CSS Files Online | Tiiny Host
View CSS files online with our free CSS Viewer tool. No software installation needed. Instantly analyze, inspect and share CSS code with a simple link.
Find elsewhere
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W3Schools
w3schools.com โ€บ css โ€บ css_editor.asp
CSS Online Editor
With our online CSS editor, you can edit HTML, CSS and JavaScript code, and view the result in your browser.
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GitHub
github.com โ€บ aKutluozen โ€บ Instant-HTML-CSS-Viewer
GitHub - aKutluozen/Instant-HTML-CSS-Viewer: AngularJS based instant HTML and CSS viewer
Instant HTML/CSS Viewer is a simple web application that utilizes two way data-binding and filtering capabilities of AngularJS giving the user an instant result of whatever HTML and CSS typed in above panels.
Author ย  aKutluozen
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Chrome Web Store
chromewebstore.google.com โ€บ detail โ€บ css-viewer-for-google-chr โ€บ eedfldkdghfkhdcanjnfiklpeehbfoag
CSS Viewer for Google Chromeโ„ข - Chrome Web Store
You can do so quickly today once you install this extension. This CSS Viewer allows you to click on any button/image/text etc on a web page and you can instantly see the CSS code ...
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Tiiny Host
tiiny.host โ€บ html-viewer
HTML Viewer: Preview Your HTML Code Online
Instantly render your HTML code in our viewer. Just copy & paste your code, no programming skills required. Ensure your HTML, JavaScript, and CSS code is error-free and standards-compliant.
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JSFiddle
jsfiddle.net
JSFiddle - Code Playground
JSFiddle - Test your JavaScript, CSS, HTML or CoffeeScript online with JSFiddle.
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Jumpshare
jumpshare.com โ€บ viewer โ€บ css
CSS Viewer - Open CSS File Online for Free | Jumpshare
Experience hassle-free viewing of Cascading Style Sheet (.css) files with our online CSS file viewer.
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JSitor
jsitor.com
JSitor - JavaScript, HTML, CSS, online editor
Test your JavaScript, CSS, HTML online with JSitor code editor.
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Reddit
reddit.com โ€บ r/webdev โ€บ looking for a embeddable html / css editor and viewer
r/webdev on Reddit: Looking for a embeddable HTML / CSS editor and viewer
October 23, 2023 -

Hi r/webdev !

I am a K-12 computer science teacher in the Netherlands and I am working on a online learning method for my students to learn the basics of HTML & CSS programming (this being their first encounter with CS). For this I use an environment in which I can use HTML to embed certain editors.

My question is: do you happen to know a embeddable HTML editor and viewer side-by-side so that I can let my children try out changing HTML code quickly on the go? What I am basically looking for is the editor and viewer combo of w3schools examples ( like this one ) but then embeddable in my own HTML environment and where I would be able to preset some code.

I already tried to simply make an <iframe> of one of those w3schools tryout pages, but w3schools doesn't allow these pages to be used in such manner.

Many thanks in advance for your help!

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Chrome-Stats
chrome-stats.com โ€บ keywords โ€บ html โ€บ html css viewer
HTML CSS Viewer - Chrome extension
November 21, 2024 - This lightweight extension allows you to instantly view and analyze the HTML and CSS of any webpage. Perfect for developers, designers, and students learning web development. ... This extension is perfect for anyone who needs to quickly view and analyze webpage source code. Whether you're learning web development, debugging your own sites, or studying how others build their pages, Page Source Viewer ...
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CodeShack
codeshack.io โ€บ html-viewer
HTML Viewer - Online HTML Renderer & Responsive Preview
This online HTML Viewer allows you to type or paste HTML code and see it rendered live in a preview pane. It's a handy tool for quickly testing HTML snippets, viewing the structure of HTML documents, or experimenting with HTML, CSS, and embedded JavaScript.