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PDF/A ​

vellora supports PDF/A-2b output for archive-oriented business documents.

What PDF/A is ​

PDF/A is an ISO-standardized subset of PDF for long-term archiving. A PDF/A file is intended to be self-contained: fonts, color information, metadata, and the resources needed to reproduce the document should travel with the file.

Current behavior ​

Use the pdfa render option:

ts
import { renderPdf } from "vellora";

const pdf = await renderPdf(invoiceHtml, data, {
  pdfa: "PDF/A-2b",
  metadata: {
    title: "Invoice INV-2026-00417",
    creationDate: "2026-06-23T00:00:00.000Z"
  }
});

When pdfa: "PDF/A-2b" is set, vellora configures the native PDF emitter for PDF/A-2b. If the emitter reports a conformance failure, renderPdf rejects with VelloraConformanceError; vellora does not silently fall back to a regular PDF.

Supported profile ​

Only PDF/A-2b is supported today. Other profiles are intentionally still planned:

  • PDF/A-2u and PDF/A-2a
  • PDF/A-3b for attachments such as source XML
  • PDF/A-4
  • PDF/UA and tagged PDF

Validation ​

vellora validates through the configured native emitter. Compliance-sensitive workflows should also validate final artifacts with the validator required by their organization, such as a CI-only veraPDF check.