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Most Spatie Browsershot PDF failures occur before PDF layout is involved: the PHP process cannot find Node.js or Chrome/Chromium, a required package is missing, or Chrome refuses to start in the server environment. Diagnose the runtime chain from the same worker, container, or web service that generates the PDF, then check driver-specific configuration and only afterward tune PDF options.
What Browsershot is doing
Spatie Browsershot is a PHP wrapper around Puppeteer and headless Chrome/Chromium. Your application asks Browsershot to load trusted HTML or a URL; Puppeteer launches the browser, renders the page, and Chrome writes the PDF. A failure at any link can appear as a generic generation exception.
First establish whether you are calling Browsershot directly or using the Browsershot driver through Laravel PDF. They expose different configuration surfaces. Laravel PDF supports multiple backends and documents Browsershot as its default driver; that driver requires Node.js and Chrome or Chromium.
1. Capture the complete failure context
Do not diagnose from “PDF generation failed” alone. Record the complete exception, including the process output and any nested error. Also record:
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- Browsershot, Puppeteer, Laravel PDF, Laravel, PHP, Node.js and Chrome/Chromium versions.
- Operating system or container base image.
- The exact code path: browser startup, page loading, rendering, or file writing.
- The binary paths and relevant Laravel PDF configuration.
- Whether the same input succeeds from an interactive shell but fails in a queue worker, web request, scheduler, or container.
This information distinguishes a missing executable from a navigation timeout, an unsupported browser option, and a filesystem permission problem.
2. Verify the runtime from the failing process
Node.js and Chrome may be installed on the host but invisible to PHP-FPM, a queue worker, or a container. Check from the same service context that executes your code, not only from your own shell. Confirm that the executable is present, runnable, and on the account’s PATH.
Laravel PDF path settings
Inspect your Laravel PDF configuration and set the paths explicitly when the service environment does not inherit the expected PATH. The documented settings include:
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node_binaryandnpm_binaryfor Node and npm.chrome_pathfor the Chrome/Chromium executable.node_modules_pathandbin_pathfor JavaScript dependencies and binaries.include_pathandtemp_pathfor PHP include and temporary-file handling.
Use absolute paths appropriate to your image or host, clear Laravel’s cached configuration after changing them, and restart long-running workers. A path that works in a login shell is not proof that the PHP service can use it.
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Direct Browsershot versus Laravel PDF
For direct Browsershot calls, configure the Browsershot instance itself. For Laravel PDF, configure the PDF package’s Browsershot driver and use its documented customization hooks. Mixing examples from the two APIs can leave the setting in a file that the active driver never reads.
3. Check the Laravel PDF v2 dependency and migration changes
Laravel PDF v2 treats spatie/browsershot as a suggested dependency. If you select the Browsershot driver, require that package explicitly in your application. An omitted dependency can surface as CouldNotGeneratePdf.
During a v1-to-v2 upgrade, the old getBrowsershot() customization method was removed. Use withBrowsershot() instead. Search your application and service providers for the removed method, update the customization, then reinstall or update dependencies consistently in the deployment environment.
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4. Test Chrome launch restrictions
If Node starts but Chrome exits immediately, inspect sandbox restrictions, shared-memory limits, user permissions, and the container’s process policy. Laravel PDF exposes a no_sandbox option, and Spatie documents that it can be needed in Docker or other restricted environments.
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Do not enable no_sandbox as a universal remedy. It reduces a browser security boundary. Use it only when the deployment environment explains the launch failure, apply the narrowest container or user fix that works, and document the security trade-off. If the error is a missing binary, bad path, or failed page navigation, this option will not solve it.
5. Separate generation errors from PDF appearance problems
If a PDF file is created and opens, Browsershot has already completed the runtime chain. Investigate rendering options instead of changing executable paths.
Output and file writing
Use the documented savePdf() method or an output path with a .pdf extension. Ensure the destination directory exists and is writable by the PHP worker. A successful browser render can still fail when the final file cannot be created or replaced.
Page geometry and pagination
Check paper format or explicit page size, margins, orientation, scale, background printing, headers and footers, and page ranges. A CSS layout that looks correct in a browser viewport may paginate differently when margins, scale, or a different paper format are applied. Change one option at a time and compare the resulting file.
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Loading and timing
For pages that depend on JavaScript, wait for a reliable selector, a deliberate delay, or network idle before generating the PDF. If remote assets are required, verify that the worker can resolve DNS, establish TLS connections, and authenticate to those resources. A timeout during page loading is not fixed by changing paper size.
6. Use a minimal reproducible PDF
- Create a tiny trusted HTML document containing plain text and one local style.
- Render it through the same queue, web service, or container that fails in production.
- If it fails, focus on Node, Chrome, paths, permissions, sandboxing, and package versions.
- If it succeeds, add the real URL, external assets, JavaScript, authentication, and layout options one at a time.
- Keep the first input that breaks as the reproducible case for your issue report.
Spatie’s PDF guidance places responsibility on the caller to validate URLs and HTML passed to Browsershot. Pass only trusted inputs; do not turn an arbitrary user-supplied URL into a server-side browser request.
Common symptoms and targeted fixes
| Symptom | Likely cause | Action |
|---|---|---|
CouldNotGeneratePdf immediately |
Missing Browsershot dependency in Laravel PDF v2 or an unusable runtime path | Require spatie/browsershot, verify configuration, and inspect the nested process error. |
| Works in a terminal, fails in a queue | Different PATH, user, permissions, or working directory | Set absolute paths and test from the worker/container context; restart workers. |
| Chrome closes at startup | Sandbox or restricted-server policy | Check container permissions and only then evaluate the documented no_sandbox setting. |
| Blank or incomplete PDF | Page assets or JavaScript had not finished loading | Wait for a selector, delay, or network-idle condition; check network access and asset errors. |
| Correct file, wrong pagination | Paper size, margins, scale, orientation, or print-background settings | Adjust PDF options deliberately and inspect page ranges and headers/footers. |
| Render succeeds but save fails | Missing directory or write permission | Use savePdf() or a .pdf path and grant the worker access to the destination. |
7. When switching drivers makes sense
Changing Laravel PDF drivers is an architectural choice, not an automatic fix for a Browsershot error. Compare the required runtime and layout features:
| Driver or service | Operational model | When it may fit |
|---|---|---|
| DOMPDF | PHP-only; no external browser binary | Simple, mostly static documents where CSS and browser fidelity are limited. |
| Gotenberg | Docker-based PDF API | Teams that want browser rendering isolated as a service. |
| WeasyPrint | Python-based executable | Deployments prepared to operate its Python runtime and CSS engine. |
| Cloudflare Browser Run | Remote browser API | When a managed remote browser is acceptable. |
| Chrome driver | Local Chrome/Chromium through chrome-php/chrome |
Applications that want direct local browser control. |
Choose based on whether you can operate a local browser, a separate service, or a remote API, and on the PDF features your templates require. Preserve a minimal test document when evaluating a replacement.
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curl -G "https://api.screenshotneo.com/v1/shot" -d access_key=YOUR_API_KEY --data-urlencode url=https://stripe.com -o shot.webpPHP
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r = requests.get("https://api.screenshotneo.com/v1/shot", params={"access_key": "YOUR_API_KEY", "url": "https://stripe.com"}, timeout=90)
open("shot.webp", "wb").write(r.content)Node.js
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What to include when asking for help
- The full exception and process output, not only its final line.
- Exact package, Puppeteer, Chrome/Chromium, Node.js, PHP, Laravel, and Laravel PDF versions.
- Operating system or container image and the service account running PHP.
- Configured executable, module, binary, include, temporary, and output paths.
- The smallest trusted HTML or URL that reproduces the issue.
- Whether failure occurs at startup, navigation, rendering, or file writing.
Without those details, “Browsershot error” is not specific enough to justify one exact fix.
Frequently Asked Questions
Why does Browsershot work locally but fail in Docker?
The container may lack Chrome, Node.js, required modules, executable permissions, shared resources, or the sandbox permissions available on your workstation. Test and configure paths inside the container and use no_sandbox only when its restrictions explain the startup failure.
Should I always enable no_sandbox?
No. It is an environment-specific setting for Docker or restricted servers and removes a browser security boundary. Fix paths, permissions, and container policy first.
Can I pass any URL to Browsershot?
No. Validate URLs and HTML and pass only trusted inputs, because the browser process can make server-side network requests.
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