DocGen Guide 128 tools · prices checked 20 Oct 2026 Find my tool
Menu

JSON API to HTML: 7 document generation tools

We list 7 tools that turn JSON sent to an API into an HTML page. Our order puts Conga Composer, Carbone and Fluent (Windward) at the top. Paid plans start at $19 a month with SourceToDocs.

Tools
7
With USD price
3, from $19
Free tier
3
Direct / via Zapier
7 / 0
Checked
20 Oct 2026
  1. 01
    Conga Composer Editor's pick conga.com

    Enterprise Salesforce document generation.

    Outputs PDF, DOCX, XLSX, PPTX, HTML, email Template Word Also reads Salesforce G2 4.4 (849)
    Not published
  2. 02
    Carbone Editor's pick carbone.io

    Priced in EUR: Essential EUR 29/mo (EUR 26 annual).

    Outputs PDF, DOCX, XLSX, PPTX, HTML Template Word Also reads Airtable, Zapier/Make/n8n
    $28 EUR 26, converted
  3. 03
    Fluent (Windward) windwardstudios.com

    Formerly Windward Studios, acquired by PDFTron (now Apryse).

    Outputs PDF, DOCX, XLSX, PPTX, HTML Template Word Also reads Salesforce, Excel G2 4.4 (77)
    On request
  4. 04
    SourceToDocs sourcetodocs.com

    Data to Google Slides and Docs.

    Outputs Google Slides, Google Docs, PDF, PPTX, DOCX, HTML Template Google Docs Also reads Airtable, Google Sheets, CSV
    $19 / mo, cheapest here
  5. 05
    Docmosis docmosis.com

    Cloud Professional $49/mo, 4,000+ pages.

    Outputs PDF, DOCX, HTML Template Word
    $49 / mo
  6. 06
    jsreport jsreport.net

    Free up to 5 templates. Enterprise $395/yr single instance.

    Outputs PDF, DOCX, XLSX, PPTX, HTML Template HTML
    On request free tier
  7. 07
    Aspose.Words products.aspose.com

    SDK. Developer Small Business license $1,679 perpetual.

    Outputs PDF, DOCX, HTML, Markdown Template Word
    On request

What differs for JSON API

Each one maps JSON API fields into a template and saves an HTML page; 5 of the 7 build that template in Word. All 7 read JSON sent to an API without a Zapier, Make or n8n step in between. Your own code decides when to call the API, so a document can be built on any event.

You can try 3 of them on a free tier. Published starting prices run from $19 to $49 a month, the top end from Docmosis. When the output is an HTML page, the most common use cases are invoices (6), reports (6) and contracts (3). Prices were checked on 20 Oct 2026.

Nearby pages

Broader list: Document generation APIs (64 tools).

By document type: JSON API to HTML for invoices (6 tools), JSON API to HTML for reports (6).

Related lists: JSON API to PDF (63 tools), JSON API to DOCX (29), JSON API to e-sign documents (16), JSON API to PPTX (11), Salesforce to HTML (7), HubSpot to HTML (6), Zapier, Make or n8n to HTML (3).

How to generate PDFs from a JSON API: a step-by-step guide, updated 21 Oct 2026.

All tools, with filters for source, output, use case and price.

Not sure which one fits? Answer three questions and get three tools back, scored by the rules on the methodology page.

Find my tool