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

JSON API to DOCX: 29 document generation tools

We list 29 tools that turn JSON sent to an API into a Word document. Our order puts Conga Composer, Formstack Documents and Carbone at the top. Paid plans start at $19 a month with SourceToDocs.

Tools
29
With USD price
16, from $19
Free tier
15
Direct / via Zapier
24 / 5
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
    Formstack Documents Editor's pick formstack.com

    Formerly WebMerge. Only in Suite plan, $250/mo paid annually, 250 deliveries/mo.

    Outputs PDF, DOCX, PPTX, e-sign documents Template Word, PDF form, Visual builder Also reads Salesforce, HubSpot, Airtable, built-in forms +2 G2 4.5 (148)
    $250 / mo
  3. 03
    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
  4. 04
    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
  5. 05
    Xpertdoc xpertdoc.com

    CCM and document generation with Microsoft Dynamics CRM connector.

    Outputs PDF, DOCX, email, e-sign documents Template Word G2 4.3 (26)
    On request
  6. 06
    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
  7. 07
    Knackly knackly.io

    Legal document automation.

    Outputs DOCX, PDF Template Word Also reads built-in forms, Zapier/Make/n8n
    $209 / mo
  8. 08
    Syncfusion Document SDK syncfusion.com

    $1,199/developer/yr (computed $99.92/mo).

    Outputs PDF, DOCX, XLSX, PPTX Template Word
    $99.92 / mo
  9. 09
    Templafy templafy.com

    AI document agents in Microsoft Office.

    Outputs PPTX, DOCX, PDF Template Word Also reads Salesforce
    $40 / mo
  10. 10
    Docmosis docmosis.com

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

    Outputs PDF, DOCX, HTML Template Word
    $49 / mo
  11. 11
    Docxpresso docxpresso.com

    EUR pricing shown as Core 2500 EUR/user/mo (likely 25.00, formatting unclear).

    Outputs PDF, DOCX Template Word Also reads built-in forms
    $27 EUR 25/user, converted
  12. 12
    docxtemplater docxtemplater.com

    JS library, MIT/GPLv3 core.

    Outputs DOCX, PPTX, XLSX Template Word
    $45 EUR 500/yr, converted
12 of 29 shown Show the other 17Hide the other 17
  1. 13
    Foxit Document Generation API developer-api.foxit.com

    Word template plus JSON. Startup $1,750/yr (computed $145.83/mo).

    Outputs PDF, DOCX Template Word
    $145.83 / mo
  2. 14
    Experlogix Document Automation experlogix.com

    Also Dynamics 365, SugarCRM, Power Platform.

    Outputs PDF, DOCX, XLSX, email, e-sign documents Template Word Also reads Salesforce
    On request
  3. 15
    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
  4. 16
    Aspose.Words products.aspose.com

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

    Outputs PDF, DOCX, HTML, Markdown Template Word
    On request
  5. 17
    Legito legito.com

    Smart document and contract automation.

    Outputs DOCX, PDF, e-sign documents Template Visual builder, Word Also reads built-in forms
    Not published free tier
  6. 18
    ActiveDocs activedocs.com

    Word-based enterprise document generation.

    Outputs DOCX, PDF, e-sign documents Template Word
    On request
  7. 19
    docassemble docassemble.org

    MIT guided-interview and document assembly.

    Outputs PDF, DOCX Template Word, PDF form Also reads built-in forms
    Free
  8. 20
    HotDocs mitratech.com

    Owned by Mitratech. Desktop and cloud.

    Outputs DOCX, PDF Template Word Also reads built-in forms
    On request
  9. 21
    PDF4me pdf4me.com

    Ynoox GmbH. Generate Documents endpoint.

    Outputs PDF, DOCX Template Word Also reads Zapier/Make/n8n
    Not published free tier
  10. 22
    Adobe Document Generation API developer.adobe.com

    Part of Adobe PDF Services.

    Outputs PDF, DOCX Template Word
    On request free tier
  11. 23
    Wordize wordize.com

    Programmatic document processing SDK.

    Outputs DOCX, PDF Template Word
    Not published
  12. 24
    Docupilot Editor's pick via Zapier docupilot.com

    Starter $29/mo, 100 docs.

    Outputs PDF, DOCX, PPTX, XLSX, e-sign documents Template Word, Visual builder Also reads Airtable, Zapier/Make/n8n, built-in forms
    $29 / mo
  13. 25
    Gavel Editor's pick via Zapier gavel.io

    Formerly Documate (Documate Inc. dba Gavel).

    Outputs DOCX, PDF Template Word, PDF form Also reads built-in forms, Zapier/Make/n8n
    $83 / mo
  14. 26
    Documentero via Zapier documentero.com

    Micro $19.50/mo shown; price formatting unclear on page.

    Outputs DOCX, XLSX, PDF Template Word Also reads Google Sheets, CSV, Excel, Zapier/Make/n8n +1
    $19.50 / mo
  15. 27
    Crove via Zapier crove.app

    Individual $33/mo billed $390/yr.

    Outputs PDF, DOCX, e-sign documents Template Word, Visual builder Also reads built-in forms, Zapier/Make/n8n
    $33 / mo
  16. 28
    DocuGenerate via Zapier docugenerate.com

    Word templates plus JSON.

    Outputs PDF, DOCX Template Word Also reads Coda, Zapier/Make/n8n
    $19 / mo
  17. 29
    PandaDoc Editor's pick pandadoc.com

    Adjacent proposal and e-sign suite.

    Outputs PDF, e-sign documents, DOCX Template Visual builder Also reads HubSpot, Salesforce, Pipedrive, Zapier/Make/n8n G2 4.7 (3324)
    $19 / mo

What differs for JSON API

Each one maps JSON API fields into a template and saves a Word document; 26 of the 29 build that template in Word. Among them, 5 need Zapier, Make or n8n to read JSON sent to an API, so they sit after the tools with a direct connection. Your own code decides when to call the API, so a document can be built on any event.

You can try 15 of them on a free tier. Published starting prices run from $19 to $250 a month, the top end from Formstack Documents. When the output is a Word document, the most common use cases are contracts (22), reports (15) and letters (15). Prices were checked on 20 Oct 2026.

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

Find my tool