Document conversion that runs at scale, server-side, and gets the details right.
Document conversion looks simple until you need it to run thousands of files an hour, server-side, with pixel-consistent output and compliant PDF/A archival. We build document conversion engines that handle DOCX, XLSX, PPTX, HTML, and PDF, with OCR, digital signatures, and e-invoice embedding, all without automating a desktop copy of Office. Deterministic, high-throughput, and yours to own.
Conversion is easy to fake with a demo and hard to get right in production.
- A prototype that automates desktop Office, then falls over the moment it has to run headless on a server at volume.
- Output that looks fine on one document and breaks on real content: missing fonts, mangled layout, broken tables.
- PDF/A and e-invoice requirements (ZUGFeRD, Factur-X) that a generic PDF library gets subtly, expensively wrong.
- Scanned archives full of images that nobody can search because there is no OCR in the pipeline.
- Per-document commercial licensing quietly baked in, so costs balloon as volume grows.
A conversion pipeline engineered for volume, fidelity, and compliance.
- Headless, server-side conversion built for throughput, not a fragile automation of desktop applications.
- Deterministic output with proper font handling, so the same input always produces the same, correct result.
- Compliant PDF/A-1, PDF/A-2, and PDF/A-3 archival, including embedded e-invoices for European regimes.
- OCR, PAdES digital signatures, true redaction, and stamping as configurable steps in the same pipeline.
- Clear licensing and full ownership of the engine we build, with open paths preferred wherever they fit.
What a document conversion engine engagement covers
Format Conversion Core
DOCX, XLSX, PPTX, HTML, and images to and from PDF, plus merge, split, and page manipulation, built for consistent output.
PDF/A Archival and E-Invoicing
Compliant PDF/A-1, PDF/A-2, and PDF/A-3 generation, including ZUGFeRD and Factur-X hybrid e-invoices with embedded XML.
OCR and Data Extraction
Searchable text from scanned documents and structured data extraction to feed downstream systems.
Signing, Redaction, and Stamping
PAdES digital signatures, true content redaction, watermarks, and headers as pipeline steps.
Batch Pipeline and Throughput
Queue-based processing designed for high volume, with retries, monitoring, and predictable performance under load.
Deployment and Handover
Production deployment, documentation, and 30 days of post-launch support so the engine runs unattended.
How we run a document engine project
Sample-Driven Discovery
We test against your real documents, not clean samples, because the hard cases hide in your actual content.
Engine Selection and Prototype
We choose the conversion engines and libraries that fit your formats and compliance needs, then prove fidelity on the worst cases first.
Build the Pipeline
The full queue-based pipeline with conversion, OCR, signing, and archival steps, instrumented for throughput and failure recovery.
Harden and Handover
Load testing, monitoring, documentation, and handover so the engine scales with your volume.
The document processing stack we build on
Getting conversion right is mostly about choosing the correct engine per format and controlling fonts and rendering. We use what holds up in production.
LibreOffice headless
Server-side conversion of Office formats to PDF without licensing or scaling a desktop Office install.
Apache PDFBox, iText, and PDF/A tooling
Reliable PDF construction, manipulation, and compliant PDF/A archival, including embedded e-invoices.
Tesseract OCR
Turning scanned images and PDFs into searchable, extractable text at scale.
.NET and Java
Robust engine hosts with mature document-processing library ecosystems for long-lived services.
Headless Chromium and Gotenberg
High-fidelity HTML to PDF where CSS-accurate rendering matters.
Message queues and object storage
Queue-based batch processing with durable storage for high-volume, resilient pipelines.
Formats and standards we handle
Document conversion questions we get asked
Related services you might need
Custom Software Development
The parent practice: domain-specific tooling, background services, and legacy modernization across many stacks.
Learn moreWindows Service Development
Background workers to run conversion and OCR pipelines unattended, at volume, for years.
Learn moreEnterprise Software & ERP
Wire document generation and archival into your ERP, invoicing, and workflow systems.
Learn moreNeed documents converted reliably, at volume, in production?
Send us your hardest sample documents and your compliance requirements. We will tell you honestly what a robust engine looks like and roughly what it takes. Fourteen years of shipping software other firms turn down, including the document work most of them get subtly wrong.