Creating a backlink checker tool like Ahrefs would require significant back-end development and access to a large index of the web to check for backlinks. However, I can provide you with a basic HTML form structure that could serve as the front-end for such a tool. This form would be used to collect URLs from the user to check for backlinks, but keep in mind that you'll need to handle the data processing and backlink checking logic on the server-side, likely with the help of an external API or service.
Here's a simple HTML form:
```html
Simple Backlink Checker Tool
```
This HTML code includes:
- A form for users to enter the URL they want to check.
- A script that prevents the default form submission and instead logs the URL to the console (as a placeholder for your back-end API call).
- A `setTimeout` function to simulate a delayed response and then displays a dummy result.
For a real-world application, you would need to replace the placeholder JavaScript code with actual API calls to your server-side script, which would then handle the backlink checking process using a database or an external service like Ahrefs, Moz, SEMrush, etc.
Remember, using such services often requires a subscription and adherence to their API usage policies.