The Excel add-in is the right tool when a person is driving. But when your own application needs filled documents — a portal issuing contracts, a nightly job producing statements — you want the same engine without Excel in the loop. The ExForms Document Generation API does exactly that: send structured data, get finished documents back.

The document generation API works like this: authenticate with an API key, pick a template set you already built in ExForms, post your data as rows, and receive a ZIP of generated documents. One API fills PDF, Word, PowerPoint, and HTML — and a single set can mix all four.

• Fill PDF, Word (.docx), PowerPoint (.pptx), and HTML templates programmatically.
• Reuse the Template Sets you already build in the add-in — no separate template system.
• Generate one or many documents from structured, Excel-style data.
• Receive everything back as a single ZIP, organised by document type.
• Drop the document generation API into backend services, scheduled jobs, or SaaS integrations.

It is an ordinary REST API, and every request carries your X-API-Key header. API access is included with Pro and Enterprise plans, and an API-access add-on pack can enable it on other plans. Keep the key server-side — it is a credential, not something to ship in a browser.

List your sets, then fetch one to see its details — including the individual files it contains and their IDs.

Data goes in as rows, spreadsheet style. Row 0 holds the column headers, which must match your Excel column names or placeholder bindings. Row 1 onward holds values, and for PDF and multi-file Word or PowerPoint output, each row produces one document. If a set uses several tables, you supply each table it needs.

You can request a document type — pdf, word, ppt, or html — which includes every file of that type in the set, or name a specific form id to generate just that one file. You only send the tables the selected files actually use.

The response gives you a download containing the generated documents, grouped by type.

• A customer portal generating contracts or certificates on demand.
• Scheduled overnight jobs producing statements for every account.
• A SaaS product offering “download as PDF” backed by real templates.
• High-volume runs where nobody should be opening Excel.

• Send Excel data to databases and apps with Connectors
• How ExForms protects your templates and data
• Fill PDF forms from Excel

Reuse the template sets you already built and call them from your backend. Endpoints, parameters, and code samples are in the Document Generation API reference.