Buy PDF Render Doctor.
Diagnose HTML-to-PDF layout breaks, overflow, and print defects before render with headless Chromium.
Drop-In Integration Stage
OpenAPI 3.1 & Gateway Compatibleimport httpx
response = httpx.post(
"https://api.youstostore.com/v1/renders",
headers={
"X-API-Key": "sk_live_your_key",
"Idempotency-Key": "render-q3-report"
},
json={
"html": "<h1>Q3 Revenue Report</h1><p>Total: €142,000</p>",
"css": "h1 { color: #1d1d1f; font-family: Inter; }",
"page": "A4",
"pdfa": True
}
)
result = response.json()
print(result["render_id"]) # poll GET /v1/renders/{render_id}
print(result["status"]) # "queued"Developer Tier
Growth Tier
RECOMMENDEDEnterprise Tier
PDF Render Doctor
Engineering Pain & Fragility
HTML-to-PDF looks simple until it becomes part of a billing or reporting workflow. A font goes missing in one environment. An image host responds slowly. A wide totals table runs beyond the page. A browser update changes pagination. A renderer consumes too much memory or never returns. The PDF may fail silently, look wrong only on page 17, or be impossible to reproduce after the runtime changes.
Teams often respond by adding more retries around an in-process Chromium instance. That keeps the rendering engine close to the application—and keeps its crashes, network access, version drift, and resource spikes there too. When an incident occurs, the application usually has a stack trace but little document-level evidence.
PDF Render Doctor separates the render operation from the application path and gives the caller a stable record to inspect. The service is intentionally constrained so the same input can be associated with the same tenant-scoped render identity and runtime version.
What the API Solves
Submit HTML plus optional CSS and HTTPS asset URLs. Choose A4 or Letter output and indicate whether PDF/A output is requested. The API validates the payload, rejects active content and blocked asset targets, creates a render, and returns a stable `render_id` with the pinned `runtime_version`.
Use that ID to retrieve job status, the PDF artifact when available, and an array of diagnostics. Diagnostics carry a machine-readable code and severity, with page and selector fields where the renderer can identify them. This makes it possible to route a failed render, annotate an internal job, or show an actionable warning without parsing browser logs.
How it works. Step by step.
Prepare controlled input.
Generate application-owned HTML and CSS. List external assets explicitly rather than asking the service to browse a page.
Create the render.
Call `POST /v1/renders` with an API key and an `Idempotency-Key`. The request is bounded by document, asset, page, time, and output-size limits.
Record the identity.
Store the returned `render_id` and `runtime_version` with your invoice, statement, or report job.
Read the result.
Call `GET /v1/renders/{render_id}` until the status is `succeeded` or `failed`.
Use the artifact and evidence.
Download the PDF from its short-lived signed URL. Process diagnostics in your queue, logs, admin UI, or quality checks.
Built for enterprise production standards.
**Deterministic render identity.** The same tenant and validated payload produce a stable render ID, making retries and support investigations easier to correlate.
**Pinned runtime evidence.** Every accepted job reports a runtime version so output changes can be traced to a known renderer and font set.
**Idempotent creation.** The required idempotency key replays the first response for 24 hours. Reusing the key with changed input returns `409` rather than creating an ambiguous duplicate.
**Structured diagnostics.** Codes, severity, page numbers, and selectors turn visual defects into data your application can route and report.
**Bounded execution.** Contract limits include HTML up to 1 MiB, CSS up to 256 KiB, no more than 50 listed asset URLs, assets up to 10 MiB, up to 100 pages, 60 seconds, and 25 MiB of PDF output.
**Narrow asset policy.** Asset URLs must use public HTTPS endpoints. Private, loopback, link-local, reserved, localhost, metadata, and non-HTTPS targets are rejected.
**No active scripting.** Script tags and `javascript
**No active scripting.** Script tags and `javascript:` content are rejected. The service does not execute customer JavaScript.
**Operational interfaces.** Liveness and readiness probes, request IDs, structured JSON errors, usage metering, and metrics support deployment and incident handling.
Ideal use cases & engineering workflows.
PDF Render Doctor fits product and platform teams that own the source HTML and need repeatable operational documents:
- Billing platforms rendering invoices, credit notes, and account statements - Fintech and insurance systems producing customer or compliance reports - SaaS products exporting scheduled reports and audit summaries - Operations teams generating labels, pick lists, or controlled forms - Platform teams replacing browser processes embedded in API workers - Support teams that need a render ID and diagnostic trail for document incidents
It is most useful when correctness, reproducibility, and failure evidence matter more than browser flexibility.
Why buy instead of building internally?
A basic converter can be built quickly. The durable work is around it: pinning browser and font versions, isolating tenants, defending against SSRF and renderer escapes, enforcing page and resource limits, managing idempotent retries, storing artifacts, signing downloads, metering usage, and exposing enough diagnostics to debug bad output.
Buy PDF Render Doctor when PDF generation is necessary but not a differentiator, and your team would otherwise own that operational surface. Build internally when you need deep browser automation, custom JavaScript execution, unusual print engines, proprietary font pipelines, or rendering tied closely to a specialized desktop application. Those requirements sit outside this product’s deliberate boundary.
Security, privacy and operational integrity.
API keys are tenant-bound; the contract specifies storing key digests rather than plaintext keys. Render records and artifact paths are tenant-scoped. Artifact downloads use signed URLs, and the product design calls for malware scanning of assets, encrypted PDF and diagnostic storage, no source or output logging, and deletion of source input after rendering.
The documented retention model keeps encrypted PDFs and diagnostics for seven days and render manifests and usage records for 30 days. Signed download links are short-lived, so callers should fetch or transfer artifacts into their own authorized storage before a link expires. Confirm retention and processing-region terms in the order form for your deployment.
The default contract allows 60 creates per minute per tenant and 10 concurrent renders. `429` responses include `Retry-After`. Domain errors distinguish blocked assets (`422`), page-limit violations (`422`), render timeouts (`504`), and sandbox failures (`503`).
Architectural Scope & Production Boundaries
Questions & answers for engineering leads.
No. You submit controlled HTML and optional CSS. The service does not browse arbitrary URLs or capture website screenshots.
Deploy PDF Render Doctor in minutes.
Start with our developer tier on Polar.sh Merchant of Record. Automated EU VAT invoices, instant API key generation, and 99.99% edge uptime SLA.