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How to Add Custom CSS to a Urlbox Screenshot

Urlbox’s css render option injects styling into a page before capture. Learn how to pair it with URL or HTML input and choose screenshot scope independently.
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Use Urlbox’s css render option to inject custom CSS into the page before it is captured. Include it with either a publicly accessible url or an html payload; choose full_page or selector separately to control what the screenshot includes.

Pass CSS as a render option

Urlbox documents css as the option for injecting custom CSS into the rendered page. Add the CSS text to the same render request as the page URL or HTML input. See the Urlbox render options for the supported option names.

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For example, the option conceptually looks like this in a request payload:

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{
  "url": "https://example.com",
  "css": "body { background: #fff; }"
}

This illustrates the option and its value; use the endpoint and authentication format documented for your Urlbox integration. The available documentation describes CSS injection but does not specify a CSS-specific size limit or additional escaping rules.

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Choose a request format and endpoint

Render link

Urlbox supports render links that include render options and return the render. This can suit a direct-link workflow. The screenshots guide covers screenshot rendering options.

POST API

The POST API accepts JSON or form data and supports the same render options as GET. It is useful when your integration needs to send options in a request body or use synchronous or asynchronous workflows. Follow the authentication instructions for the specific endpoint: the POST API documentation specifies HTTP Basic authentication with the secret key as the username, while the synchronous endpoint in the API reference shows bearer authentication. Do not assume those endpoint instructions are interchangeable.

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See the POST API documentation and API reference for endpoint details.

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Control styling and capture scope independently

The css option changes page styling; it does not define which part of the page is captured. Use the capture options for that:

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  • full_page requests a full-page screenshot.
  • selector targets a selected element.

For full-page captures, Urlbox describes stitch as the default mode, optimized for accuracy, and native as faster but less reliable on some sites. Choose based on whether accuracy or speed matters more for the particular page and output.

When CSS is not enough

Use the separate js option when the change requires page behavior rather than styling. Urlbox documents custom JavaScript as running after the page DOM has loaded and before capture; its documentation says await can be used in that code. The docs specify that js requires Ultra or above. The options reference does not state an equivalent plan restriction for css.

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  • Built-in 2 Omnidirectional Mics - EMEET webcam with microphone for desktop features 2 built-in omnidirectional microphones, picking up your voice to create clear audio for communication. When installing the webcam, select EMEET C960 as the default microphone input device in your computer and video applications and select C960 as the default device in Zoom/Teams and ensure microphone permissions are enabled for proper use. Please note that C960 does not include built-in speakers.
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Troubleshooting custom CSS

  • The page renders without the intended styling: Check that the request includes the css option and that its value is CSS text, alongside a valid URL or HTML input.
  • The screenshot shows the wrong region: Adjust full_page or selector; these control capture scope, not styling.
  • The change needs interaction or page logic: CSS only changes presentation. Consider the separate js option and verify its plan requirement and execution timing in Urlbox’s render options.
  • Authentication fails: Confirm the exact endpoint you are calling and use its documented authentication method. Urlbox’s POST API and synchronous API reference describe different methods.
  • A full-page capture is slow or inconsistent: Compare the documented stitch and native modes, weighing stitch’s accuracy focus against native’s speed and possible reliability trade-off.

Urlbox’s documentation establishes what the CSS option is intended to do, but does not guarantee identical results on every website. Site behavior and page structure can affect the outcome.

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Or skip the browser setup

ScreenshotNeo can return a screenshot or PDF with one GET request. Its cleanup steps accept cookie or consent banners and remove more than 60 known consent platforms, newsletter popups, and chat widgets before capture; each step can be turned off. Bot checks and CAPTCHAs, blank pages, timeouts, failed loads, and cache hits are not billed, and responses identify the page verdict and billing status in headers. It also provides an MCP server with screenshot, page-info, and PDF tools for AI agents.

Example using cURL:

curl -G "https://api.screenshotneo.com/v1/shot" -d access_key=YOUR_API_KEY --data-urlencode url=https://example.com -o shot.webp

See the ScreenshotNeo API documentation for request options. The free plan includes 1,000 screenshots per month with no card; paid plans start at $5 for 3,000 shots. Sign up for ScreenshotNeo’s free plan.

Quick Recap

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Compatible with Nintendo Switch 2’s new GameChat mode; Built-In Mic: The built-in microphone lets others hear you clearly during video calls
$35.80
SaleBestseller No. 2
Logitech C270 720p Webcam Plug-and-Play Wide Screen Video Calling - Black
Logitech C270 720p Webcam Plug-and-Play Wide Screen Video Calling - Black
Compatible with Nintendo Switch 2’s new GameChat mode
$16.89
Bestseller No. 5
Logitech C920x HD Pro PC Webcam Full 1080p/30fps Video - Black
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Compatible with Nintendo Switch 2’s new GameChat mode; Fully compatible with Windows 11
$69.99
Best Value
Logitech C920x HD Pro PC Webcam Full 1080p/30fps Video - Black
  • Compatible with Nintendo Switch 2’s new GameChat mode
  • HD lighting adjustment and autofocus: The Logitech webcam automatically fine-tunes the lighting, producing bright, razor-sharp images even in low-light settings. This makes it a great webcam for streaming and an ideal web camera for laptop use
  • Advanced capture software: Easily create and share video content with this Logitech camera that is suitable for use as a desktop computer camera or a monitor webcam
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Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.

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