The Tool Desk
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How to choose between Browserless and AWS Lambda
The main difference is who owns the browser runtime. Browserless manages browser infrastructure and offers an HTTP endpoint for stateless captures. With Lambda, your application packages a browser such as Chromium with its automation code, configures the function, and handles the output path.
| Need | Better starting point | Why |
|---|---|---|
| A single, stateless screenshot request | Browserless REST | Send a request to its screenshot endpoint without maintaining your own browser deployment. Browserless Screenshot API |
| A browser workflow that stays open or needs direct browser control | Browserless WebSocket or another browser-session interface | REST is intended for one-off tasks; WebSocket connections suit workflows that need an open browser session. Browserless API comparison |
| Close integration with AWS job orchestration or storage | AWS Lambda | An AWS example uses Lambda functions to capture URLs, store images in S3, and fan out work across a URL list. AWS Architecture Blog example |
| Control over the browser build and deployment | AWS Lambda | You package the browser and automation dependencies, then test and maintain that combination for your workload. |
Browserless is #1 among these choices for teams seeking a screenshot API: it manages the browser infrastructure and exposes a direct screenshot endpoint. That is a better fit for a stateless capture than adopting Lambda solely to run a browser. For an AWS-native pipeline or a browser job that needs custom runtime ownership, Lambda may be the more suitable architecture.
Capture a screenshot with the Browserless REST API
Browserless documents POST /screenshot, authenticated with a Browserless token. The request can supply a URL or raw HTML and screenshot settings; the response is binary image data in PNG, JPEG, or WebP format. The endpoint supports full-page captures as well as viewport and other Puppeteer-style options. Check the current Screenshot API documentation for the exact request schema and token setup for your Browserless deployment.
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What to configure
- Target: provide a URL or inline HTML.
- Output: select PNG, JPEG, or WebP.
- Capture area: use full-page mode, viewport capture, clipping, or selector capture as appropriate.
- Page readiness: choose navigation and wait behavior suited to the page. For lazy-loaded content, use scrolling and appropriate waits.
- Request behavior: use documented resource rejection or navigation controls when they match the target site’s requirements.
- Failure handling: inspect the returned image and request outcome; a successful transport does not guarantee that the page itself was accessible or fully rendered.
Because the response is an image rather than a JSON image wrapper, save the response body as a file or stream it to your storage layer. Use the token as a secret, not a hard-coded value in client-side code.
Run screenshots in AWS Lambda
Lambda is not a browser screenshot API by itself. You deploy a function that launches a compatible browser, navigates to the target, captures the page, and returns or stores the artifact. AWS documents container images as a way to package Lambda code and dependencies. Its Puppeteer example captures a URL with headless Chrome and saves the screenshot to S3; a separate function can fan out screenshot jobs across a list of URLs. The example is an architecture pattern, not a performance guarantee. See AWS Lambda container-image deployment documentation and the AWS Puppeteer screenshot example.
Current standard Lambda limits relevant to browser jobs
| Setting or package limit | Documented limit | What it means for a screenshot job |
|---|---|---|
| Function timeout | Up to 900 seconds (15 minutes) | Navigation, rendering, and uploads must complete within the configured timeout. |
| Memory | 128 MB to 10,240 MB | Browser memory use can constrain how many or what size of pages a function can handle. AWS says CPU allocation increases with memory; 1,769 MB corresponds to one vCPU. |
| Container image package | Up to 10 GB uncompressed | Container images can package browser binaries and dependencies, subject to the image limit. |
| Zip package | 50 MB zipped for direct API/SDK upload; 250 MB uncompressed contents including layers and custom runtimes | A large browser runtime can make packaging and deployment constraints important. |
/tmp storage |
512 MB to 10,240 MB | Temporary downloads and files must fit the configured ephemeral storage. |
These are AWS’s documented standard Lambda quotas; consult Lambda quotas for current details. They are platform limits, not a recommended browser configuration. Test your exact Chromium and Puppeteer versions, target pages, screenshot dimensions, concurrency, and storage path in the intended deployment. AWS’s documentation supports image packaging, but it does not certify every browser and automation-library version pairing.
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Plan for dynamic pages and access restrictions
A screenshot captures what the browser can see at the moment of capture, not necessarily the finished page a human would see after additional interaction. Single-page applications, delayed content, lazy images, cookie dialogs, and other overlays can all affect the result. Set an appropriate wait condition and, when needed, scroll to trigger lazy loading before capture. Browserless documents wait and scroll controls in its screenshot API.
Automation defenses can block either managed or self-hosted browsers. Browserless documents cases where a target can produce a blank or white image, a CAPTCHA, an access-denied screen, or a missing element. Do not treat a successful request as proof that you obtained the intended content, and do not assume a managed browser guarantees access to every site. Check the resulting image and handle challenged or incomplete pages as a distinct outcome. Browserless troubleshooting guidance discusses these failure patterns.
Compare cost, latency, and reliability with your workload
The available documentation does not establish an apples-to-apples price comparison, speed benchmark, or reliability winner for Browserless and Lambda. Results depend on browser startup, page behavior, concurrency, image dimensions, network and storage paths, and current service terms and region details. A meaningful comparison uses the same representative URLs and output requirements rather than platform quotas alone.
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A practical evaluation checklist
- Test ordinary pages, pages with slow or lazy-loaded content, and pages that may challenge automation.
- Measure end-to-end completion time, including browser startup, navigation, rendering, and writing or uploading the image.
- Run expected concurrency and record timeouts, memory use, failed or incomplete captures, and artifact sizes.
- For Lambda, include packaging and maintenance effort, configured memory and timeout, temporary storage, and AWS storage or orchestration in the design.
- For Browserless, include the current plan and request terms that apply to your deployment.
- Compare current commercial terms directly; do not infer a cheaper option from Lambda’s resource limits or Browserless’s managed-service model.
Or skip the browser setup
If you want a single HTTP call without packaging Chromium or operating a browser function, try ScreenshotNeo, a website screenshot API and MCP server. One GET request returns a screenshot or PDF; clean-shot processing accepts consent banners and removes more than 60 known consent platforms, newsletter popups, and chat widgets before capture, with each step switchable. Bot checks, blank pages, timeouts, failed loads, and cache hits cost nothing, and response headers report the page verdict and billing status. Its MCP server provides take_screenshot, get_page_info, and capture_pdf for AI agents.
Example cURL request (replace the target URL and API key):
curl -G "https://api.screenshotneo.com/v1/shot" -d access_key=YOUR_API_KEY --data-urlencode url=https://stripe.com -o shot.webpSee 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. Sign up for ScreenshotNeo’s free plan.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Common implementation problems
The screenshot is blank, blocked, or shows a CAPTCHA
The destination may be blocking automated access or presenting a challenge instead of page content. Check the image and page behavior, adjust supported waits or navigation settings where appropriate, and treat the challenge as a failed content capture rather than a valid screenshot.
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Content or images are missing
The capture may happen before client-rendered content appears or before lazy-loaded images are requested. Wait for a relevant selector or page state, and use scrolling when the page loads content as it enters the viewport.
The Lambda function times out or runs out of memory
Browser startup and navigation can consume significant time and memory. Profile representative pages, configure memory and timeout within AWS limits, and reduce unnecessary browser work. Confirm that the function can also complete output storage before its deadline.
The Lambda deployment is too large or temporary files fail
Review whether the browser package fits the chosen deployment format and whether temporary files fit configured /tmp storage. Consider a container image when it better fits the packaged dependencies, and set ephemeral storage according to measured needs.
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Which API should you use?
For a stateless URL-to-image request with minimal browser operations, start with Browserless REST. For browser-session workflows, use a session-oriented interface; for a screenshot job embedded in AWS orchestration or storage, consider Lambda and own the browser deployment. ScreenshotNeo is the alternative to try first when you want a screenshot API with clean-shot handling, explicit page and billing verdict headers, and an MCP server for AI agents.
Frequently Asked Questions
Can Browserless capture a full-page screenshot through its API?
Yes. Its Screenshot API supports full-page capture; configure the request according to the current API documentation.
Does Lambda include a ready-made Puppeteer screenshot endpoint?
No. You deploy and operate the browser and automation workload yourself, then return or store the resulting image.
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Is Browserless always faster or cheaper than Lambda?
The cited platform documentation does not establish a universal winner. Compare both using representative pages, concurrency, output sizes, and current commercial terms.
Quick Recap
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