How to capture an image of a website

This tool generates a screenshot of a web page from an address, at widths that simulate desktop, laptop, tablet and mobile. It is useful for keeping a record of how a site looked on a given day or for getting an idea of how it appears on different screens.

Type the website address in the field (with or without https://; if it is missing, the tool adds it). Only http and https addresses are accepted.
Choose the width: Desktop (1920 px), Laptop (1366 px), Tablet (768 px), Mobile (375 px) or "Custom" to type any value you like.
Click "Capture" or press Enter in the address field.
Wait for the image to load. When it appears, use "Download Screenshot" to save it.

How it works and what the limits are

The capture is not made on your device. The page builds a request to a single public screenshot service (thum.io) with the address and the chosen width, and shows the image it returns, limited to 1200 px of height. There is no backup service: if that service fails, the tool shows a clear error message instead of an image. This has a few consequences:

Quality, speed and availability depend on that external service, which may have usage limits.
Pages that require a login, that sit on an internal network or that block robots will not be captured correctly.
The image shows the top of the page, not the whole page.
The "Download Screenshot" button fetches the image and saves it as a file. If the service does not allow that direct access, the image opens in a new tab and you have to save it by right-clicking (or tapping and holding on a phone) and choosing "Save image as".

Validation

A custom width must be a whole number between 320 and 1920 pixels; outside that range, the tool warns you instead of silently using a default value. The address is checked too: invalid addresses or ones with other protocols (such as ftp://) are rejected.

Practical examples

Responsiveness test: capture the same site at 1920 and at 375 px to compare the computer and phone layouts.
Visual record: keep the look of a page before a site redesign, to compare afterwards.
Presentations and reports: use the image to illustrate a design reference or an article.
Portfolio: show the result of a site you built, in desktop and mobile versions.

Tips

Use the custom width to test CSS breakpoints, such as 1024 or 414 px.
If the capture fails, wait a moment and try again: the service may be overloaded.
Very heavy pages or pages with a lot of animation may come out incomplete.
Respect copyright: a screenshot of a third-party site does not give you the right to reuse its content.
First, check that the site responds with Is Up.

Privacy and how it works

The address you type and the width you choose are sent to the external capture service, which visits the page and returns the image. So do not enter addresses that contain sensitive data, such as private links, tokens or logged-in areas. The tool keeps no history in your browser. More details in the Privacy Policy.

Frequently asked questions

Does the capture show the whole page?

No. The image is limited to the top of the page, with a maximum height of 1200 px.

Why did "Could not generate the image" appear?

The external service may have failed, taken too long, blocked the request or been unable to reach the site. Try again later or with another address.

Can I capture pages that require a login?

No, because the service visits the page as an anonymous visitor, without your session.

The download button opened the image in another tab. What do I do?

This happens when the browser does not let the page fetch the image directly. Right-click (or tap and hold on a phone) the image and choose to save it.

Does the capture really simulate a phone?

It changes the width of the capture window, which triggers the responsive layout of most sites, but it does not emulate a specific device.

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