Online HTML Editor
Write HTML with a live side-by-side preview, then download the result. The preview is sandboxed with scripts disabled, so pasted markup is safe.
How to use it
- Type or paste HTML on the left — the preview updates as you type.
- Download saves a complete .html file you can open directly.
- Scripts are disabled in the preview, so pasted code cannot run.
This is a plain HTML editor with a live split-pane preview — type or paste markup on one side and see it rendered on the other, updating on every keystroke with no build step and no save button to remember to press. It is meant for the everyday case of trying out a snippet, checking how a piece of markup actually renders, or writing a small static page from scratch before it goes anywhere else.
The preview runs in a sandboxed iframe with scripts disabled. That is a deliberate safety choice, not a missing feature — it means you can paste markup copied from anywhere, including code you did not write yourself, without any embedded script having a chance to execute against this page.
Downloading a real file
Download saves what you have written as a complete, standalone .html file, which opens correctly in any browser and is a real place to test JavaScript — the sandbox restriction only applies to the in-page preview here, not to the file once it is on your own machine.
Questions people ask
Why does my JavaScript not run in the preview?
The preview frame is sandboxed on purpose. It lets you paste markup from anywhere without risking it interfering with this page. Download the file to test scripts locally.
Is anything uploaded?
No. Everything runs in your browser — no file, image or snippet you use here ever leaves your device.
Last updated 22 August 2026