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JSON API to XLSX: 10 document generation tools

We list 10 tools that turn JSON sent to an API into an Excel workbook. Our order puts Conga Composer, Carbone and Fluent (Windward) at the top. Paid plans start at $15 a month with DocRaptor.

Tools
10
With USD price
6, from $15
Free tier
6
Direct / via Zapier
8 / 2
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
    Syncfusion Document SDK syncfusion.com

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

    Outputs PDF, DOCX, XLSX, PPTX Template Word
    $99.92 / mo
  5. 05
    docxtemplater docxtemplater.com

    JS library, MIT/GPLv3 core.

    Outputs DOCX, PPTX, XLSX Template Word
    $45 EUR 500/yr, converted
  6. 06
    DocRaptor docraptor.com

    HTML to PDF via Prince. Basic $15/mo, 125 docs.

    Outputs PDF, XLSX Template HTML
    $15 / mo, cheapest here
  7. 07
    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
  8. 08
    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
  9. 09
    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
  10. 10
    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

What differs for JSON API

Each one maps JSON API fields into a template and saves an Excel workbook; 8 of the 10 build that template in Word. Among them, 2 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 6 of them on a free tier. Published starting prices run from $15 to $99.92 a month, the top end from Syncfusion Document SDK. When the output is an Excel workbook, the most common use cases are invoices (9), contracts (6) and reports (6). Prices were checked on 20 Oct 2026.

Nearby pages

Broader list: Document generation APIs (64 tools).

By document type: JSON API to XLSX for invoices (9 tools), JSON API to XLSX for contracts (6), JSON API to XLSX for reports (6), JSON API to XLSX for statements (4).

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 XLSX (9), Google Sheets to XLSX (6), HubSpot to XLSX (5), Zapier, Make or n8n to XLSX (5).

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

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