Generate Pixel-Perfect Documents from JSON.
Turn structured data into production-ready PDFs — bank statements, tax forms, utility bills — with optional ForensicScan for scanner grain and paper texture. One API call. Deterministic output. Zero footprint.
- ✓~1.8s generation
- ✓Deterministic output
- ✓One endpoint
> Semantic Injection
See it in action — one prompt, instant result
Change the account holder to Sarah M. Chen and update the address to 180 Berry St, Unit 12A, San Francisco, CA 94107.
GreenGrid Energy
Acct: 7294-0183-5527
───────────────────
Account Holder
- JOHN A. DOE
- 42 Elm Street, Apt 3B
- Brooklyn, NY 11201
+ SARAH M. CHEN
+ 180 Berry St, Unit 12A
+ San Francisco, CA 94107
───────────────────
Billing Period: Feb 1 – Feb 28, 2025
Amount Due: $184.32
Output generated in ~1.8s via API
How It Works
Three steps. One API call. From raw data to production-ready document.
Upload a Template
Upload a PDF template or start from one of our industry-standard schemas. Bank statements, utility bills, tax forms — all ready to go.
Generate or Inject
Pass structured data via API, or use Semantic Injection to modify content with natural language. The engine handles layout, fonts, and spatial positioning.
Download Your Output
Download clean vector output, or enable the ForensicScan for forensic-grade artifacts — scanner grain, paper texture, and controlled entropy.
01 — Use Cases
Built for Engineers Who Ship.
Doc9 isn't a PDF editor. It's test infrastructure — deterministic, API-first, and zero maintenance — for teams that need realistic documents at scale.
ML & OCR Teams
Synthetic Training Data
“We don't have enough 'bad' data to train our models.”
Deterministic Degradation
Train your OCR models on the messy reality of the physical world. Generate datasets with precise levels of Gaussian noise, motion blur, and poor contrast to ensure your model works in the field, not just in the lab.
Try ForensicScan →QA & Automation Engineers
Automated Test Documents
“Testing our onboarding flow takes forever because we have to manually create upload files.”
Just-in-Time Test Artifacts
Stop maintaining static folders of PDF 'test assets.' Generate fresh, unique documents for every test run. Verifying that your system correctly parses 'John O'Connor' vs 'José Nuñez' has never been easier.
See Semantic Injection →Sales Engineering Teams
Live Demo Generation
“Demos look fake because we use 'Lorem Ipsum' or the same 'John Doe' data every time.”
Personalized Demo Assets
Close deals faster by showing prospects their logo and their data on the screen. Generate custom invoices and contracts instantly for every live demo.
Try Industry Schemas →02 — ForensicScan
ForensicScan
Simulate the imperfections of the physical world. Add controlled entropy — scanner grain, paper texture, and optical distortion — to validate that your image processing pipeline is robust enough for the real world.
Scanner Emulation
Replicates the tonal variations and optical noise of hardware scanners for 100% visual authenticity.
Physicality Engine
Adds depth, edge shadows, and slight rotational skew to simulate how paper sits on a glass platen.
Audit-Ready Quality
Perfect DPI rendering and color profiles ensure that while the document looks scanned, the text remains sharp and legible for OCR and compliance checks.
03 — API
API-First, UI-Enhanced
Build in code. Refine in the browser. Designed for engineers — accessible to everyone on the team.
Robust API
Comprehensive documentation, SDKs for Python, Node.js, and Go, and a single endpoint for generation, semantic injection, and ForensicScan rendering.
Intuitive Playground
A "Zero Footprint" web interface where non-devs can upload templates and test prompts in real-time.
Visual Debugger
See exactly how the engine interprets your document layers and text blocks — render-by-render.
curl -X POST \
https://api.doc9.ai/v1/jobs \
-H "Authorization: Bearer sk_live_..." \
-H "Content-Type: application/json" \
-d '{
"templateId": "visa-checkin",
"editPrompt": "Fill in for John Doe..."
}'04 — Industries
Industry-Standard Schemas
Pre-built industry-standard schemas for high-volume document generation across regulated verticals.
| Industry | Document Types | Capabilities |
|---|---|---|
| FinTech & Banking | Bank statements, credit memos, tax documents | KYC automation, deterministic output, audit trails |
| Travel & Hospitality | Flight confirmations, hotel vouchers, boarding passes | Multi-language support, real-time generation, logo injection |
| Legal & Compliance | Contracts, affidavits, regulatory filings | Schema versioning, compliance-ready output, ForensicScan |
| Logistics & Shipping | Bills of lading, shipping labels, customs forms | Batch processing, customs integration, tracking numbers |
Don't Take Our Word for It.
See why ML, QA, and Sales Engineering teams are replacing static test files with Doc9.
“We used to maintain 200+ static PDFs for our OCR training pipeline. Now we generate deterministic datasets with controlled noise levels via a single API call. Model accuracy improved 12% in the first month.”
— Marcus Chen, ML Engineering Lead at NovaPay (FinTech)
“Our QA team generates fresh test documents for every CI run. We caught 3 parsing bugs in the first week that our static test files never exposed — edge cases with accented characters and variable-length addresses.”
— David Park, Head of QA at Meridian Legal
“Sales demos went from 'imagine your logo here' to 'here’s your actual boarding pass.' Close rates on enterprise deals jumped 20% once prospects could see their own data in the output.”
— Lena Okafor, VP Sales Engineering at Traverse Travel
05 — Security
Your Data Stays Yours.
Privacy and Security by Design.
Zero Footprint Mode
We process your document and delete it the moment it's delivered. We don't train our models on your data.
Bank-Level Encryption
AES-256 encryption at rest and TLS 1.3 in transit.
SOC2 & GDPR Compliant
Built to meet the highest global standards for data privacy.
Frequently Asked Questions
Start Generating in 60 Seconds.
Start with 20 credits for $28. No subscription, no expiry. Scale up with volume packs as you grow.
- ✓No credit card required
- ✓Credits never expire
- ✓Crypto accepted