Render API

jsontoimg turns design templates into PNG, JPG, WebP, AVIF, and PDF files. Send JSON overrides for text, colors, and layers — get a finished asset back.

Start with the Quick Start. Design in J2I Studio, then generate images or PDFs.

Get started

• Quick Start — API key, first render, curl

• Importing templates — Create a template and name layers for the API

• Changelog — Breaking changes, announcements, and notable updates

Design

• J2I Studio — Visual editor, layer names, API tab

Generate

• Image generation — PNG, JPG, WebP, AVIF

• PDF generation — Multi-page PDFs from templates

Integrations

• n8n — Official community node — templates, renders, batches

• WordPress — Official plugin — Gutenberg block, shortcode, featured images

• HTTP from your stack — Zapier, Make, Sheets, Airtable — any HTTP POST

• MCP — Drive renders from Cursor, Claude, and VS Code

SDKs & Reference

• Node.js — Official TypeScript SDK

• Python — Call the HTTP API from Python

• PHP — Call the HTTP API from PHP

• Errors — Status codes and machine-readable codes

• Code examples — curl, Node, Python, PHP

Downloads

• OpenAPI spec
• Postman collection