HTML Editor
HTML Editor is a free, browser-based tool for writing and previewing HTML without any installation or setup. Built by Bob The Cow, it provides a full editing environment that runs entirely in the browser.
Introducing v2.0!
Version 2.0 is the most significant update to the HTML Editor since its initial release. The original plain text input has been replaced with a purpose-built code editor featuring full syntax highlighting across HTML, CSS, and JavaScript, along with bracket matching, auto-close tags, and proper indentation. Auto-save was introduced, so work is preserved automatically across sessions. Dark mode was implemented fully across the entire interface. The mobile layout was overhauled, and several longstanding bugs were resolved. V2.0 takes the HTML Editor from a functional prototype to a polished, reliable tool.
Check out the awesome features!
The Editor | Live Preview | Auto-Save | Dark Mode | Mobile Support
The Editor
At the core of the tool is a fully-featured code editor built for writing HTML in the browser. Unlike a basic text field, the editor understands the structure of HTML documents and applies syntax highlighting across HTML, CSS, and inline JavaScript simultaneously. Tags, attributes, strings, comments, CSS properties, and JavaScript keywords are all rendered in distinct colors, making it significantly easier to read code and spot issues at a glance. The editor also includes bracket matching, which highlights paired brackets as you navigate, and auto-close tags, which automatically completes closing tags as you type. The Tab key inserts consistent two-space indentation, and line numbers are displayed alongside the code at all times.
Live Preview
The preview pane renders your HTML output in real time inside an inline frame, giving you an accurate representation of how the page will look in a browser. Switching between the editor and preview is instant via the tab controls at the top of the editor area. The preview updates every time a change is made, so there is no need to manually refresh or trigger a render.
Auto-Save
Every change made in the editor is written to the browser's local storage automatically, with no action required from the user. If the tab is closed, the browser is refreshed, or the session is interrupted for any reason, the content is fully restored the next time the page is opened. Nothing is stored on a server and no account is required. The saved state persists in the browser until the user explicitly clears it.
Dark Mode
The editor includes a full dark mode, toggled via the button in the top right corner. Switching themes is instant and covers the entire page, including the background, header, navigation controls, and the editor itself. The editor uses a carefully tuned dark color scheme that maintains all syntax token colors at full contrast, so the visual distinction between tags, attributes, strings, and comments remains just as clear as it is in light mode.
Mobile Support
The layout is fully responsive and adapts cleanly to smaller screens. On mobile, the header reflows so that the title and action buttons stack vertically rather than competing for horizontal space. All buttons retain their text labels at every screen size, and the editor and preview heights scale proportionally to the viewport so the interface remains usable without layout issues.
Try it out!
Ready to try out HTML Editor? Click the button below! It's free, and there are no ads. No account required!