DocGen Guide 128 tools · prices checked 20 Oct 2026 Find my tool
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JSON API to PPTX: 11 document generation tools

We list 11 tools that turn JSON sent to an API into a PowerPoint deck. Our order puts Conga Composer, Formstack Documents and Carbone at the top. Paid plans start at $19 a month with SourceToDocs.

Tools
11
With USD price
7, from $19
Free tier
7
Direct / via Zapier
10 / 1
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
    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
  6. 06
    Syncfusion Document SDK syncfusion.com

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

    Outputs PDF, DOCX, XLSX, PPTX Template Word
    $99.92 / mo
  7. 07
    Templafy templafy.com

    AI document agents in Microsoft Office.

    Outputs PPTX, DOCX, PDF Template Word Also reads Salesforce
    $40 / mo
  8. 08
    docxtemplater docxtemplater.com

    JS library, MIT/GPLv3 core.

    Outputs DOCX, PPTX, XLSX Template Word
    $45 EUR 500/yr, converted
  9. 09
    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
  10. 10
    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
  11. 11
    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

What differs for JSON API

Each one maps JSON API fields into a template and saves a PowerPoint deck; 8 of the 11 build that template in Word. Among them, 1 needs Zapier, Make or n8n to read JSON sent to an API, so it sits 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 7 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 PowerPoint deck, the most common use cases are reports (9), invoices (7) and proposals (6). Prices were checked on 20 Oct 2026.

Nearby pages

Broader list: Document generation APIs (64 tools).

By document type: JSON API to PPTX for reports (9 tools), JSON API to PPTX for invoices (7), JSON API to PPTX for proposals (6), JSON API to PPTX for contracts (5).

Related lists: JSON API to PDF (63 tools), JSON API to DOCX (29), JSON API to e-sign documents (16), JSON API to XLSX (10), Salesforce to PPTX (11), Google Sheets to PPTX (8), HubSpot to PPTX (8), Airtable to PPTX (6).

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

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