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JSON API to PPTX for reports: 9 document generation tools

For reports, we list 9 tools that turn JSON sent to an API into a PowerPoint deck. The lowest paid starting price is $19 a month, from SourceToDocs. The first three in our order are Formstack Documents, Carbone and Fluent (Windward).

Tools
9
With USD price
6, from $19
Free tier
7
Direct / via Zapier
9 / 0
Checked
20 Oct 2026
  1. 01
    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
  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
    Syncfusion Document SDK syncfusion.com

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

    Outputs PDF, DOCX, XLSX, PPTX Template Word
    $99.92 / mo
  6. 06
    Templafy templafy.com

    AI document agents in Microsoft Office.

    Outputs PPTX, DOCX, PDF Template Word Also reads Salesforce
    $40 / mo
  7. 07
    docxtemplater docxtemplater.com

    JS library, MIT/GPLv3 core.

    Outputs DOCX, PPTX, XLSX Template Word
    $45 EUR 500/yr, converted
  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
    Gamma gamma.app

    AI presentations. Exports PPTX, PDF, Google Slides on Free.

    Outputs PPTX, PDF, Google Slides Template Visual builder Also reads HubSpot
    Not published free tier

What differs for JSON API

For reports delivered as PPTX, templates are built in Word (6), a visual builder (2) and Google Docs (1). All 9 read JSON sent to an API without a Zapier, Make or n8n step in between. Of these, 7 have a free tier.

Besides PPTX, these tools for reports also write PDF (8), DOCX (8) and XLSX (5). Your own code decides when to call the API, so a document can be built on any event. Published starting prices run from $19 to $250 a month, the top end from Formstack Documents. Prices were checked on 20 Oct 2026.

Nearby pages

Broader list: JSON API to PPTX (11 tools).

Related lists: JSON API to PPTX for invoices (7 tools), JSON API to PPTX for proposals (6), JSON API to PPTX for contracts (5), JSON API to PDF for reports (35), JSON API to DOCX for reports (15), JSON API to HTML for reports (6), JSON API to XLSX for reports (6).

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

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