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JSON API to XLSX for reports: 6 document generation tools

For reports, we list 6 tools that turn JSON sent to an API into an Excel workbook. The lowest paid starting price is $15 a month, from DocRaptor. The first three in our order are Carbone, Fluent (Windward) and Syncfusion Document SDK.

Tools
6
With USD price
4, from $15
Free tier
5
Direct / via Zapier
6 / 0
Checked
20 Oct 2026
  1. 01
    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
  2. 02
    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
  3. 03
    Syncfusion Document SDK syncfusion.com

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

    Outputs PDF, DOCX, XLSX, PPTX Template Word
    $99.92 / mo
  4. 04
    docxtemplater docxtemplater.com

    JS library, MIT/GPLv3 core.

    Outputs DOCX, PPTX, XLSX Template Word
    $45 EUR 500/yr, converted
  5. 05
    DocRaptor docraptor.com

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

    Outputs PDF, XLSX Template HTML
    $15 / mo, cheapest here
  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

What differs for JSON API

For reports delivered as XLSX, templates are built in Word (4) and HTML (2). All 6 read JSON sent to an API without a Zapier, Make or n8n step in between. Of these, 5 have a free tier.

Besides XLSX, these tools for reports also write PDF (5), DOCX (5) and PPTX (5). Your own code decides when to call the API, so a document can be built on any event. Published starting prices run from $15 to $99.92 a month, the top end from Syncfusion Document SDK. Prices were checked on 20 Oct 2026.

Nearby pages

Broader list: JSON API to XLSX (10 tools).

Related lists: JSON API to XLSX for invoices (9 tools), JSON API to XLSX for contracts (6), JSON API to XLSX for statements (4), JSON API to PDF for reports (35), JSON API to DOCX for reports (15), JSON API to PPTX for reports (9), JSON API to HTML for reports (6).

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

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