Automated Invoices, Certificates & Reports at Microsecond Speed
Generate vector PDF invoices, 80mm POS receipts, verifiable course certificates, analytics decks, and 4x6 thermal shipping labels in under 30 milliseconds.
Automated Invoice & Receipt PDF API
High-speed REST API microservice built on our pure Dart vector engine. Render professional PDF invoices and 80mm POS thermal receipts in under 30 milliseconds.
Microsecond Speed
Native AOT compiled microservice generating crisp vector PDFs in < 30ms with < 25MB RAM.
QR Payments & Taxes
Embedded bKash, Nagad, SEPA, UPI & Crypto payment QR codes with automatic tax & discount math.
POS Thermal Receipts
Format receipts for 57mm or 80mm roll printers with 1D Code128 and 2D QR barcodes.
Custom Themes
Inject custom brand colors (Hex), logos, multi-currency symbols, and custom Terms & Conditions.
curl -X POST https://api.rackupit.com/v1/invoice \
-H "X-API-Key: rackup_demo_key_2026" \
-H "Content-Type: application/json" \
-d '{
"invoiceNumber": "INV-2026-001",
"seller": { "name": "RackUp IT Solutions" },
"customer": { "name": "Acme Corp" },
"items": [{ "name": "Cloud Hosting", "unitPrice": 45.00, "quantity": 1 }],
"payment": { "status": "PAID", "qrData": "https://rackupit.com/pay/001" }
}' --output invoice.pdfhttps://api.rackupit.com/v1/invoiceOpen Playground →Complete API Feature Set (8 Endpoints)
High-speed RESTful endpoints engineered for instant developer integration.
A4 PDF Invoice Generator
Renders A4 vector PDF invoices with seller/customer info, item line tables, taxes/VAT, discounts, payment status badges, theme hex colors, and custom watermarks ('PAID', 'DRAFT').
80mm POS Thermal Receipt Generator
Renders 80mm thermal POS receipts with Code128 barcodes and QR payment barcodes for retail & restaurant systems.
Verifiable Course Certificate Generator
Renders landscape course completion certificates with vector borders, gold seals, and QR verification codes.
Analytics Decks & Financial Reports
Generates executive financial & system performance reports with KPI metric cards and module breakdown tables.
ATS-Friendly Resume / CV Generator
Generates multi-column professional resumes optimized for ATS parsing with skill tags and work experience timelines.
4x6 Inch Thermal Shipping Label
Generates 4x6 inch thermal shipping labels with 1D Code128 tracking barcodes (UPS/FedEx/DHL compliant).
HTML & Mustache Template Engine
Parses custom HTML/CSS templates with {{variable}} substitution into native vector PDFs.
Async Batch PDF Generation
Processes bulk arrays of up to 100 invoice payloads in a single request and returns a unified multi-document PDF stream.
Simple, Usage-Based API Plans
Scale seamlessly from side projects to enterprise billing platforms.
Community
Perfect for side projects and local testing.
- 100 PDFs / month
- All 8 Endpoint Document Types
- 80mm POS Thermal Receipts
- Interactive Web Playground
Growth
Ideal for online stores & billing SaaS platforms.
- 5,000 PDFs / month
- Verifiable Certificates & Reports
- Custom Hex Theme Colors & Logo
- Base64 Output & Watermarks
Business
For high-volume marketplaces & ERP systems.
- 50,000 PDFs / month
- Async Batch PDF Generation API
- HTML & Mustache Template Engine
- 99.9% Dedicated Uptime SLA