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Repair common Windows errors and clear accumulated junk for a smoother, more stable PC - no reinstall needed.Free scan · no reinstallFirst check whether the request is synchronous: DocRaptor documents a 60-second generation limit for synchronous requests and a 600-second limit for asynchronous requests. For a document that cannot finish in the synchronous window, use async creation, then poll its status or handle a callback. If it still runs slowly or fails, inspect the job’s error details and narrow down external assets, JavaScript, resource-fetch waits, and concurrency; async extends the generation window but does not identify or eliminate every cause.
Identify which timeout or failure you have
Record the request mode, elapsed time, HTTP response or asynchronous status, and the exact error text before changing settings. DocRaptor’s API reference describes a 60-second synchronous generation limit and a 600-second asynchronous generation limit; its limits guide expresses these as one minute and ten minutes. These are DocRaptor generation limits, not a universal timeout setting for the client making the request. Your own HTTP client may stop waiting earlier, so distinguish a client-side timeout from a DocRaptor response or job failure. DocRaptor API Reference · API Limits Documentation
| Mode | Documented generation window | Response and follow-up |
|---|---|---|
| Synchronous | 60 seconds | The request waits for the PDF response; the API reference documents this generation limit. |
| Asynchronous | 600 seconds | The request returns a status_id; poll the status endpoint or use a callback, then retrieve the PDF when complete. |
The figures above are DocRaptor product limits, not an independent performance benchmark. Async changes the request and monitoring workflow and gives the job a longer generation window; it does not make the renderer intrinsically faster.
Move long-running documents to asynchronous creation
Set async to true when a document may take longer than the synchronous limit. The initial response acknowledges the job rather than returning the finished PDF. Keep its status_id and track the documented states: queued, working, completed, and failed. You can check the status endpoint or configure callback_url. When the status is completed, retrieve the generated document; when it is failed, inspect validation_errors for the failure details. Follow the request and response examples for your API client in DocRaptor’s asynchronous document creation documentation.
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- Read Before You Buy — No Video Output: These adapters support charging and USB 2.0 data transfer, but cannot transmit video signals. Except for standard USB webcams (which use USB data only), they are not compatible with HDMI/DisplayPort cables, video-capable USB-C hubs, or docking stations with video output.
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- Submit the document request with
async: true. - Save the returned
status_id; do not treat the acknowledgement as the PDF. - Poll the status endpoint or receive the configured callback until the job reaches a terminal state.
- Retrieve the PDF after
completed; iffailed, readvalidation_errorsand correct the reported issue.
Reduce work from external assets and scripts
A document can take longer when it depends on many external resources or scripts. DocRaptor says complex documents may take several minutes and recommends reducing avoidable asset work. Review every stylesheet, image, font, and script requested during conversion:
- Remove external assets that do not appear in the final PDF.
- Reduce the size of necessary assets and avoid loading oversized files.
- Where practical, inline CSS or JavaScript, or embed images as data URIs; consider the trade-off in HTML size and maintainability.
- Disable JavaScript if the document does not need it.
These changes reduce avoidable work, but they cannot guarantee that every timeout has the same cause. DocRaptor’s guidance is in asset speed optimization.
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Distinguish an asset-fetch wait from the overall render limit
The prince_options[http_timeout] setting controls how long DocRaptor waits for an external resource, not the overall document-generation window. DocRaptor documents a default of 10 seconds and an accepted range of 1–60 seconds. Increasing it can give a slow required resource more time to load; decreasing it can allow processing to move past an unavailable or sluggish resource sooner. Change it only when evidence points to a resource fetch: it does not extend the 60-second synchronous or 600-second asynchronous generation limit. See the API reference for the setting.
Check JavaScript readiness and errors
DocRaptor disables JavaScript by default. If your HTML-to-PDF output depends on JavaScript, first confirm that enabling it is necessary. Then inspect script errors and console messages, and make sure asynchronous page work has a clear finish condition. DocRaptor provides docraptorJavaScriptFinished() for signaling readiness: return false while required work is pending and true when it is done. The API documentation says other return values are errors. Avoid a readiness condition that can wait indefinitely, and account for the fact that behavior can depend on pipeline settings. See JavaScript execution documentation and the API reference.
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Check concurrency when slowdowns coincide with load
DocRaptor’s limits page lists a default of 30 simultaneous requests and notes that the limit is often increased for larger customers. If timeouts cluster when your application launches many jobs at once, check the concurrency limit applicable to your account. This is separate from the per-document generation window: lowering simultaneous load may address capacity pressure, but it does not lengthen an individual request’s allowed processing time. API Limits Documentation
Narrow down a failure that remains unexplained
- Preserve the failing request’s mode, elapsed time, returned HTTP details or async status, and any error text.
- Try a minimal document that retains the required page structure but omits optional assets and scripts.
- Add content back in groups—remote assets, JavaScript, then more complex layout—until the slow or failing component returns. This is a practical isolation technique, not a DocRaptor-guaranteed diagnostic procedure.
- For async jobs, compare the job’s
validation_errorswith the response and status history. If the details do not explain the problem, consult DocRaptor’s PDF generation troubleshooting documentation and support route.
Or skip the browser setup
If the job you need is a screenshot rather than a generated PDF, ScreenshotNeo offers a one-request website screenshot API. For a PDF, the relevant parameter support and options are documented at ScreenshotNeo’s API documentation.
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For example, this cURL request captures Stripe as a WebP image:
curl -G "https://api.screenshotneo.com/v1/shot" -d access_key=YOUR_API_KEY --data-urlencode url=https://stripe.com -o shot.webpScreenshotNeo accepts cookie or consent banners like a visitor and removes more than 60 known consent platforms, newsletter popups, and chat widgets before capture; each cleanup step can be turned off. Bot checks, blank pages, timeouts, failed loads, and cache hits are not billed, and responses identify the page verdict and billing status. Its MCP server provides take_screenshot, get_page_info, and capture_pdf tools for AI agents. The free plan includes 1,000 screenshots per month with no card; paid plans start at $5 for 3,000 screenshots.
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- Powerful Pass-Through Charging: Supports up to 85W pass-through charging so you can power up your laptop while you use the hub. Note: Pass-through charging requires a charger (not included). Note: To achieve full power for iPad, we recommend using a 45W wall charger.
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Frequently Asked Questions
What does DocRaptor’s http_timeout setting control?
It sets the wait for an external resource, not the total time allowed for PDF generation.
Does enabling async make a DocRaptor renderer faster?
No. It changes the response and monitoring flow and provides a longer generation window; it does not guarantee faster rendering.
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