HTML Online Viewer highlights the HTML for better readability using the high performance editor: Ace (license).

You can see the live preview of the HTML on the same page, but you can also show the preview in a new separate tab where it would be more stable.

The highlighted code can also be shown in a separate tab where it would be rendered at once (not in the editor), so the browser's native search function can be used (Ctrl+F). This highlighting is done using a reliable third-party library: highlight.js (license).

The formatting function can be useful too. It is done using an efficient third-party library: JS Beautifier (license).

Available functions:

• Preview (Alt+1) button renders the HTML code in a new tab.
• Highlight (Alt+2) button shows the entire highlighted code in a new tab.
• Format (Alt+3) button beautifies the HTML text.
• Expand all (Alt+4) button expands all elements.
• Collapse all (Alt+5) button collapses all elements.
• 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 Google Analytics. If you don't want to allow this, you can disable cookies in your browser.

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:

• Text Online Viewer
• JSON Online Viewer
• XML Online Viewer

The favicon is from the Oxygen Icons set made by KDE (license)

If you have any suggestions, please use the following contact email address: