Template formats
Word vs HTML templates for PDF generation
Choose the template format around the people who will maintain the document. Word is worth considering when a client or operations team already owns a DOCX template and needs to keep editing it. HTML is often a practical choice when developers own the layout and already work with HTML and CSS.
Both approaches can combine application data with a reusable template. The useful comparison is who edits the source, how changes reach production, and how you test the resulting PDF.
This guide is published by TmplVision, which generates documents from Word templates. It explains where that approach fits and where an HTML-based workflow may be a better choice.
Compare the work involved
| Decision | Word templates | HTML templates |
|---|---|---|
| Who maintains the layout? | A person comfortable editing DOCX can change text and formatting. Someone still needs to maintain the data placeholders. | Developers can maintain markup and CSS. Some services also provide visual editors, so HTML does not always require direct code editing. |
| What do you already have? | An existing Word document gives you a starting layout. It still needs supported placeholders and output checks. | Existing web markup and CSS may provide a starting point. A screen layout may need separate print styles. |
| How do you review changes? | Use your team's document review process and keep the deployed template version identifiable. | Plain-text templates work naturally with source-control diffs and code review. Visual-editor services may use a different process. |
| How do tables and conditions work? | The template engine needs supported tags for repeated rows and optional content. | The selected template engine or application code supplies loops and conditions. HTML alone does not fill your business data. |
| What controls page layout? | Document formatting is the starting point; the server-side conversion engine determines the final PDF. | Print CSS and the selected renderer determine the final PDF. Support for layout features depends on the renderer. |
| What needs testing? | Fonts, images, long text, changing row counts and page breaks in the actual output. | Fonts, assets, long text, changing row counts and page breaks in the actual output. |
The template format does not decide whether you use a hosted API or operate a renderer yourself. Assess those operational choices separately.
When Word templates are a good fit
Consider an agency building a proposal workflow for a client. The client's existing Word document contains its introduction, service descriptions and closing text. The application supplies customer details and line items.
If the client wants to keep editing that document, a Word-based template can avoid maintaining a separate HTML copy of the same layout. Agree which placeholders must remain intact and who uploads a revised template. In TmplVision, a revised DOCX can replace the file of an existing template, which keeps its template ID and status; uploaded as a new template, it must be activated and its new ID used. TmplVision does not keep the replaced file, so keep your own copy of each released version. Changing wording can leave the application's data structure unchanged; adding a new field may require a corresponding application change.
TmplVision's proposal example illustrates this with downloadable Word files, JSON data and saved PDF results. One version changes the introduction while using the same data. Another omits a support paragraph by setting support to false.
These are example documents with fictional data, not a customer case study or a live generation on this page.
When HTML templates are a good fit
HTML deserves consideration when your development team owns the document, reviews layout changes alongside application code, or already has reusable markup and styles. You can keep that work within familiar development tools.
Plan for the PDF's page dimensions rather than assuming a browser screen layout will print unchanged. For example, Puppeteer's Page.pdf() uses the print CSS media type (Puppeteer documentation).
Print styles can change presentation, and CSS @page can specify page dimensions, orientation and margins. Check the selected renderer's support for the features your document needs (MDN printing guide).
A working HTML workflow does not need replacing merely because a Word-based service exists. The reason to change should be a maintenance or authoring requirement that the current setup does not meet well.
Test the document that will actually be used
Before choosing either approach, try a representative template with:
- Short and long customer names and paragraphs.
- Empty, short and long item lists, with any validation required by your application.
- Optional sections both present and absent.
- The fonts and images you expect to use.
- Enough content to exercise more than one page.
Review both the text and the page layout. A correct API response does not prove that a paragraph, table or image appears where the recipient expects it. Neither Word nor HTML provides a universal guarantee of identical layout across every rendering environment.
Also decide where business calculations belong. In the TmplVision proposal example, the caller supplies formatted rates, line amounts and the total. The document generator inserts those values; it does not calculate the proposal's amounts or taxes.
Try the Word approach with the example files
Start with the Word proposal and saved PDF. The files are available without registration, so you can inspect the template and expected result before configuring an integration.
To generate your own PDF through TmplVision, use a verified account, an uploaded and activated template, its template ID, and an API token from the same region. Follow the Node.js guide for application code or the n8n guide for a workflow. Each guide describes its verification scope and setup requirements.
The API request references the saved template and supplies the variables. This is document generation from a template and data, rather than simply converting an arbitrary finished Word file.
The comparison here concerns the format you author your template in. TmplVision also offers HTML output from Word templates; that does not make its input template an HTML template.
See the Word approach with real files.
The proposal example contains the editable DOCX files, the JSON data and the saved PDF results, free to download without an account.