> For the complete documentation index, see [llms.txt](https://developers.oxylabs.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developers.oxylabs.io/help-center/products-and-features/does-web-unblocker-have-javascript-rendering.md).

# Does Web Unblocker have JavaScript rendering?

Learn how to enable server-side JavaScript rendering in Web Unblocker.

Yes, with Web Unblocker, [JavaScript rendering](https://developers.oxylabs.io/products/web-scraper-api/features/js-rendering-and-browser-control#javascript-rendering) is executed on our side, so you don’t have to worry about it. Instead of setting up a headless browser by yourself, you can include the `X-Oxylabs-Render` header in your requests with either `html` or `png` value. Response data will then be an HTML output or PNG screenshot accordingly (depending on the parameter passed).

If you want to read more about this feature, [visit our documentation](https://developers.oxylabs.io/products/web-unblocker/custom-browser-instructions/javascript-rendering) for more information


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