A design that stays yours
Compose sections, fields and rows. Control colors, spacing, borders and alignment through a single JSON specification.
The JSON-to-PDF API
Your data.
Your data.
Your design.
Ready to print.
Turn structured JSON into beautifully formatted PDFs. Invoices, checklists, reports—one simple API for the documents your app needs.
Built for application backends. Powered by Quollnet.
FROM STRUCTURE TO DOCUMENT
{
"version": 2,
"template": { "sections": [...] },
"data": { "reference": "INV-0042" }
}{ }HARBOR
ENGINEERING
INVOICEENGINEERING
Invoice
INV-0042BILLED TOMeridian Contractors
ISSUED19 October 2026
DescriptionAmount
Engineering services$3,375.00
Monthly project support$1,850.00
TOTAL DUE$5,747.50
Generated by QTypeset1 / 1
A small API. A capable engine.Let your app handle the data.
Let your app handle the data.
We’ll handle the page.
Define your document once. Send new data whenever you need a PDF.
Every page considered
Flowing tables, repeated headings and predictable page breaks keep long documents readable, from the first page to the last.
JSON in. PDF out.
Send your JSON and image assets with an API key. Receive a finished PDF, ready for your app to download, email or store.
See the outputDifferent documents.
Different documents.
The same simple approach.
Download real examples generated by QTypeset. Each includes its JSON source.
Invoice
Clear line items, totals and verification codes.
Inspection checklist
Full- and half-width checks, findings and sign-off.
Review & approval
Issuance details, review choices and comments.
Construction form
Multi-logo letterhead and coordinated project records.
Invoice with assets
The same document with separately uploaded logos.
Start with a working example.
All sample PDFs, JSON definitions and image assets in one download.
Download sample pack ↓Ready when your app is.Make your next PDF
Make your next PDF
the easy one.
Sign in with QAuth to get your API key and the report-design reference.
Start building