Document Generation API

A document generation API. JSX or JSON in, native PPTX out.

No coordinate math, no raw OOXML, no LibreOffice dependency. Components instead of coordinates. Editable Excel charts backed by an embedded workbook — the kind where a recipient clicks in and sees the actual data.

[01] What you get

Three capabilities that no other library ships together.

Each solves a problem that blocks teams from shipping automated decks.

Declarative API

Components, not coordinates

python-pptx needs 47 lines for a title and subtitle. PaperJSX needs three. Describe what goes on the slide — the engine handles layout, alignment, and spacing.

JSX or JSON input
8 slide patterns
Automatic layout

3lines to render a slide

Editable Charts

Real PowerPoint chart objects

Every chart is backed by an embedded Excel workbook. Recipients click in, see the data, modify it. No other library under $999 does this.

Excel-embedded workbook
6 chart types
Works in Google Slides

6chart types

OOXML Validated

Zero repair dialogs

We track every repair-dialog bug in python-pptx and PptxGenJS and test against all of them. If PaperJSX generates it, PowerPoint opens it cleanly.

Spec-validated output
No repair prompts
Clean in every viewer

0repair dialogs

[02] API surface

Send JSON, get a deck.

One structured payload in, one editable .pptx out. No templates, no browsers, no glue code.

Request

typing…

POST /api/v1/renderContent-Type: application/json{  "version": "2.0",  "title": "Q2 Board Update",  "accentColor": "#5A7A9B",  "slides": [    {      "slideType": "title-body",      "title": "Q2 Board Update",      "body": ["Revenue up 34% QoQ"]    },    {      "slideType": "kpi-grid",      "title": "Key Metrics",      "items": [        { "label": "ARR", "value": "$2.4M" },        { "label": "NRR", "value": "118%" }      ]    }  ]}

Response

waiting

HTTP/1.1 200 OKContent-Type: application/vnd.openxmlformatsContent-Disposition: attachment; filename="q2-update.pptx"X-PaperJSX-Duration: 148msX-PaperJSX-Slides: 2<binary .pptx file>

[03] LLM-native

AI agents generate presentations without coordinate-level calls.

The declarative JSON schema means AI agents can generate presentations without coordinate-level positioning calls that LLMs consistently get wrong. Ship a PaperJSX MCP server in your agent stack and let the model describe slides in structured data instead of fighting with imperative APIs.

Structured data in, deterministic output out — the contract AI agents need.

[04] Performance

Built for production throughput.

PaperJSX is a compiled PPTX engine, not a rendering pipeline.

0ms

Typical generation

Slide patterns

SDK license cache

Chart types

[05] Scope

What PaperJSX supports today.

We do text, images, tables, shapes, and charts well. Here is exactly what is and isn't covered.

Capability	Capability	Status
Text, titles, body copy	Text, titles, body copy	Supported
Tables	Tables	Supported
Images and shapes	Images and shapes	Supported
Editable Excel charts	Editable Excel charts	Supported — 6 types
Master slide inheritance	Master slide inheritance	Supported
PPTX, DOCX, PDF output	PPTX, DOCX, PDF output	Supported
SmartArt	SmartArt	Not yet
Animations	Animations	Not yet
Embedded video	Embedded video	Not yet

See it in action.

Open the playground, paste structured JSON, and get a real deck in under 200ms. No signup required.

Try for free