HTML Preview

About this tool

Paste HTML and see it rendered live in a sandboxed preview frame, so you can check your markup without creating a file.

Example

Input: <h1>Hi</h1>

Output: rendered heading

Privacy

This tool runs entirely in your browser. Your data is processed locally and never uploaded to a server.

How to use this tool

1. Paste your HTML into the input area.
2. Check the live preview frame to see how the page is rendered.
3. Edit the HTML and watch the preview update as you work.
4. Use the preview to catch broken tags, missing text, or layout issues before saving the file.

Step by step, what happens

1. The tool takes the HTML you paste and loads it into a sandboxed preview frame.
2. It renders the markup like a browser would, so you can inspect the visible result immediately.
3. If you change the code, the preview reflects those changes without you needing to create a file.
4. Because the frame is sandboxed, the preview stays isolated from the rest of the page.

Worked example

Suppose you want to check a simple page heading and paragraph before putting the code into your project.

Input: <h1>Hello, world!</h1><p>This is a preview.</p>

1. Paste the HTML into the tool.
2. The sandboxed frame renders the heading and paragraph as normal page content.
3. You can confirm the text, spacing, and element order look right before copying the code elsewhere.

Tips and common mistakes

• Include a full HTML snippet for the part you want to inspect, not just a single tag with no visible content.
• Remember that scripts and some external resources may not behave the same way inside a sandboxed preview frame.
• Use the preview to check structure and visual output, but test final behavior in your actual app or browser page too.
• If something looks wrong, inspect the markup for missing closing tags or nested elements in the wrong place.

Frequently asked questions