Outdated Drivers Are Slowing You Down
One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchWindows Errors? Fix Them Before They Spread
Repair common Windows errors and clear accumulated junk for a smoother, more stable PC - no reinstall needed.Free scan · no reinstallYou can convert HTML to PDF in AWS Lambda with Chromium if you package a browser compatible with your chosen runtime and architecture, keep temporary browser and PDF files in /tmp, and size memory, timeout, and storage for the documents you actually render. AWS supports both ZIP deployments and container images, but the AWS documentation cited here does not specify a maintained Chromium build, automation library, or launch flags. Verify those pieces for your deployment before relying on a copyable browser-launch recipe.
What a Lambda HTML-to-PDF function needs
A Chromium renderer is more than application code: the function needs a compatible browser binary, the browser’s required libraries, an automation layer that can drive it, and enough resources to load the page and write the PDF. Package and validate those dependencies for the Lambda runtime and CPU architecture you select. The AWS limits below describe the Lambda environment; they are not Chromium performance recommendations.
- A compatible browser stack: Choose and verify a maintained Chromium distribution and automation library. The AWS sources cited in this guide do not name or validate one.
- A Lambda-compatible package: Deploy dependencies in a ZIP package or use a container image. A non-AWS container base image must include a Lambda runtime interface client.
- Writable temporary space: Put browser profiles, intermediate files, and generated PDFs under
/tmp, not in the function’s read-only filesystem. - Measured resource settings: Set memory, timeout, and ephemeral storage using representative pages and output sizes.
- A result path: Return the PDF or upload it to durable storage before the invocation ends. Treat local files as temporary.
Choose ZIP deployment or a container image
Neither packaging option is a universal winner for Chromium. A ZIP deployment can suit an existing function release workflow when the browser and dependencies fit that packaging approach. A container image offers more control over the build and runtime configuration, which can be useful for custom dependencies. In either case, verify compatibility with Lambda’s runtime, architecture, and filesystem model. AWS documents both deployment approaches and describes container images as useful when an application needs more build control or custom runtime configuration (AWS: Create a Lambda function using a container image; AWS: .zip file archives).
ZIP package
Package the application and browser dependencies in a ZIP deployment or through layers. Confirm the resulting artifact and dependencies work with the selected runtime and architecture. The sources cited here do not establish a suitable Chromium ZIP or layer.
Quick wins for a faster PC:
Clear out junk files and repair common Windows errorsFree Scan →Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →#1 Best Overall
Container image
Lambda accepts container images, including images based on non-AWS base images. A non-AWS image must include a runtime interface client so Lambda can invoke the function. The image must also work with Lambda’s read-only filesystem model and the least-privileged default user; ensure required browser files are readable. AWS documents a maximum uncompressed image size of 10 GB (AWS: Create a Lambda function using a container image).
Configure memory, timeout, and /tmp
Lambda’s standard function memory setting ranges from 128 MB to 10,240 MB, and CPU power increases in proportion to configured memory. AWS states that at 1,769 MB a function has the equivalent of one vCPU; that is a service fact, not a recommendation or a rendering benchmark. The maximum standard invocation timeout is 900 seconds (15 minutes). Do not treat either maximum as a default target: test realistic HTML complexity, network behavior, PDF size, and invocation variation before choosing settings (AWS: Lambda quotas).
Lambda provides configurable ephemeral storage from 512 MB to 10,240 MB per execution environment. Browser profiles, cached resources, intermediate files, and PDFs may all consume that space. AWS specifically notes that PDF creation and media processing can benefit from more ephemeral storage (AWS: Configure ephemeral storage for Lambda functions).
- Render representative documents and observe peak temporary-file use, including browser profile and output files.
- Set the function’s ephemeral storage to cover measured peak use with appropriate headroom; Lambda allows 512 MB–10,240 MB.
- Measure rendering duration across representative pages, then set memory and timeout to fit observed work with room for ordinary variation.
- Exercise network-dependent pages and larger outputs, since variable load or rendering duration can cause failures near the timeout.
AWS publishes these configuration ranges, not a universal memory, timeout, or storage setting for Chromium.
Implementation sequence
- Select runtime and architecture. Choose the Lambda runtime and CPU architecture, then verify that your selected Chromium build and automation library support both.
- Package the complete browser stack. Include the browser and required libraries with the application. For a container based on a non-AWS image, include a Lambda runtime interface client.
- Keep writes in
/tmp. Configure temporary browser profiles, intermediate artifacts, and PDF output to use that directory. Do not write to the read-only parts of the filesystem. - Set and test resource limits. Use representative documents to establish memory, timeout, and ephemeral-storage requirements rather than assuming the Lambda maximums are sensible defaults.
- Deliver the PDF before returning. Return the result or upload it to durable storage before the invocation completes. Remove per-invocation artifacts when they are no longer needed.
- Check container details if applicable. Stay within the 10 GB uncompressed image limit, and confirm the default least-privileged user can read the browser and its dependencies.
The available AWS documentation establishes these packaging and execution constraints but does not verify a specific Chromium binary, automation API, or invocation code. Consequently, a trustworthy runnable browser recipe depends on independently validating those implementation choices for the selected runtime and architecture.
Manage reused environments safely
Lambda may reuse an execution environment for another invocation, so initialized objects or cached static assets can reduce repeated setup. AWS recommends initializing SDK clients and database connections outside the handler. Reuse is an optimization, not durable storage: environments and /tmp contents are transient and may not persist indefinitely (AWS: Lambda best practices; AWS: Lambda execution environment).
- Use
/tmponly for transient files, and clean up artifacts created for each request. - Do not assume a later invocation will find a file left by an earlier one.
- Do not leave sensitive user data in reusable environment state or temporary files where a later request could access it.
- Keep shared initialization limited to safe reusable objects and static assets; keep request-specific data isolated.
Troubleshoot common deployment failures
The following checks follow from Lambda’s documented constraints. The exact error text and browser-specific remedy depend on the Chromium build and automation library you select.
| Symptom | Likely cause | What to check |
|---|---|---|
| Function cannot start or the browser cannot launch | Browser binary, runtime, architecture, or required libraries are incompatible or missing. | Verify the chosen browser distribution and automation library against the Lambda runtime and CPU architecture; confirm packaged dependencies are readable and present. |
| Container image is rejected or does not invoke correctly | Image format, runtime interface client, filesystem behavior, or image size does not meet Lambda requirements. | For a non-AWS base image, include a runtime interface client; ensure the application tolerates a read-only filesystem and the uncompressed image is no larger than 10 GB. |
| Cannot create browser profile or PDF file | The browser or application is writing outside the writable temporary directory. | Direct profiles, intermediate files, and output to /tmp. |
| Invocation times out | Rendering or network work exceeds the configured timeout, or varies enough to approach it. | Measure representative workloads, adjust memory and timeout based on those measurements, and account for variable network loading. The standard invocation maximum is 900 seconds. |
| Temporary storage fills during rendering | Profiles, intermediate resources, or output exceed the configured ephemeral storage. | Measure peak temporary use, increase storage within the 512 MB–10,240 MB range if needed, and clean up per-invocation artifacts. |
| A later invocation sees unexpected files or state | The implementation assumes reused environments are isolated or that /tmp is cleared between invocations. |
Delete request artifacts, avoid sensitive reusable state, and treat both the environment and its temporary files as transient. |
Performance, reliability, and cost considerations
Rendering time and resource use depend on the page, browser package, network activity, and output. AWS’s memory-to-CPU relationship means changing memory also changes CPU allocation, but the published limits do not predict a particular page’s speed. Benchmark with representative HTML and PDF outputs in the target runtime and architecture; no general performance figure follows from the Lambda quotas.
Best Value
Reliability requires headroom below the configured timeout for variable rendering and network work, plus sufficient temporary storage for peak files. Since execution environments can be reused but are not durable, persist any PDF that must outlive the invocation outside the environment. The sources cited here establish Lambda’s resource limits and behavior, not a universal cost estimate for a PDF workload; calculate costs using your own invocation pattern and current AWS pricing.
Or skip the browser setup
If your goal is to capture a web page as a PDF rather than maintain a Chromium runtime in Lambda, ScreenshotNeo offers a screenshot API and MCP server. A single GET request can return a PDF as well as PNG, JPEG, or WebP. For example, using the PDF response option described in the ScreenshotNeo API documentation:
curl -G "https://api.screenshotneo.com/v1/shot" -d access_key=YOUR_API_KEY --data-urlencode url=https://stripe.com -d format=pdf -o page.pdf- Cookie banners are accepted and removed before capture; newsletter popups and chat widgets are also removed. Each step can be turned off.
- Bot checks or CAPTCHAs, blank pages, timeouts, failed loads, and cache hits are not billed; response headers report the page verdict and billing status.
- An MCP server provides
take_screenshot,get_page_info, andcapture_pdftools for AI agents. - The free plan includes 1,000 shots per month with no card; paid plans start at $5 for 3,000 shots.
Sign up for ScreenshotNeo free: 1,000 screenshots a month, no card required.
Frequently Asked Questions
What is the maximum standard Lambda function timeout?
AWS documents a maximum of 900 seconds (15 minutes) for a standard invocation.
What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
Can a Lambda function use a non-AWS container base image?
Yes. The image must include a Lambda runtime interface client and meet Lambda’s image and filesystem requirements.
Quick Recap
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.
