Self-Hosting

A single Docker container that exposes the Forme render engine as an HTTP API. Same endpoints as the API reference, runs anywhere Docker runs. No Chromium, no LibreOffice, no database, no native dependencies.

docker run --rm -p 3000:3000 formepdf/forme:latest

PDF API on port 3000. That’s the whole install.

Quick Start

Docker run

docker run --rm -p 3000:3000 formepdf/forme:latest

Docker Compose

docker-compose.yml

version: "3.8"

services:
  forme:
    image: formepdf/forme:latest
    ports:
      - "3000:3000"
    environment:
      - FORME_API_KEY=your-secret-key     # optional
      - FORME_TEMPLATES_DIR=/templates    # optional
    volumes:
      - ./templates:/templates:ro
    restart: unless-stopped

docker compose up

Health check

curl http://localhost:3000/health
# {"status":"ok","version":"0.9.0"}

API Endpoints

All SDKs work against the self-hosted server — their HTTP clients take a base URL.

Endpoint	Description
`POST /v1/render`	Inline render — compiled template JSON + data in request body
`POST /v1/render/:slug`	Template render — loads pre-compiled JSON from mounted volume
`POST /v1/certify`	Certify an existing PDF with an X.509 certificate
`POST /v1/redact`	Redact regions or text patterns from a PDF
`POST /v1/merge`	Merge multiple PDFs into one
`POST /v1/rasterize`	Convert PDF pages to PNG images
`GET /health`	Health check

Inline render

Pass the compiled template JSON and data directly in the request body. No template storage needed. Fully stateless.

curl -X POST http://localhost:3000/v1/render \
  -H "Content-Type: application/json" \
  -d '{"template": {"children": [{"kind": {"type": "Page"}, "children": [{"kind": {"type": "Text", "content": "Hello"}}]}]}, "data": {"customer": "Acme"}}' \
  --output invoice.pdf

const res = await fetch("http://localhost:3000/v1/render", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({
    template: compiledTemplateJson,
    data: { customer: "Acme", amount: 1500 },
  }),
});

const pdf = Buffer.from(await res.arrayBuffer());
fs.writeFileSync("invoice.pdf", pdf);

import requests

res = requests.post(
    "http://localhost:3000/v1/render",
    json={
        "template": compiled_template_json,
        "data": {"customer": "Acme", "amount": 1500},
    },
)

with open("invoice.pdf", "wb") as f:
    f.write(res.content)

The template field is the compiled document JSON tree — the output of forme build --template or serialize() in @formepdf/react. The data field is optional; when present, Forme evaluates template expressions ($ref, $each, $if) against it before rendering.

Template render

Mount a directory of pre-compiled JSON templates and reference them by slug (filename without .json).

./templates/
  invoice.json
  contract.json
  report.json

curl -X POST http://localhost:3000/v1/render/invoice \
  -H "Content-Type: application/json" \
  -d '{ "data": { "customer": "Acme", "amount": 1500 } }' \
  --output invoice.pdf

const res = await fetch("http://localhost:3000/v1/render/invoice", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({
    data: { customer: "Acme", amount: 1500 },
  }),
});

res = requests.post(
    "http://localhost:3000/v1/render/invoice",
    json={"data": {"customer": "Acme", "amount": 1500}},
)

Templates are loaded from disk on each request — no restart needed when templates change.

Certify

curl -X POST http://localhost:3000/v1/certify \
  -H "Content-Type: application/json" \
  -d '{
    "pdf": "<base64-encoded PDF>",
    "certificatePem": "-----BEGIN CERTIFICATE-----\n...",
    "privateKeyPem": "-----BEGIN PRIVATE KEY-----\n...",
    "reason": "Approved"
  }' \
  --output certified.pdf

Redact

curl -X POST http://localhost:3000/v1/redact \
  -H "Content-Type: application/json" \
  -d '{
    "pdf": "<base64-encoded PDF>",
    "patterns": [{"pattern": "Jane Doe", "pattern_type": "Literal"}],
    "presets": ["ssn", "email"]
  }' \
  --output redacted.pdf

Merge

curl -X POST http://localhost:3000/v1/merge \
  -H "Content-Type: application/json" \
  -d '{
    "pdfs": ["<base64 PDF 1>", "<base64 PDF 2>"]
  }' \
  --output merged.pdf

Rasterize

curl -X POST http://localhost:3000/v1/rasterize \
  -H "Content-Type: application/json" \
  -d '{
    "pdf": "<base64-encoded PDF>",
    "dpi": 150
  }'

Returns { "pages": ["<base64 PNG>", ...] }. The rasterizer runs as a PDFium-based sidecar service on port 3001 inside the container. It starts automatically. Configure via RASTERIZER_URL if running separately.

Compiling Templates

The self-hosted container is a pure Rust binary with no Node.js runtime. This means .tsx templates must be compiled to JSON before mounting — the same way you’d compile TypeScript before deploying to production.

# Compile a single template
npx forme build --template invoice.tsx

# Output: invoice.json (compiled document tree)

In your CI pipeline, add the build step alongside your existing TypeScript compilation:

# Install dependencies
npm install @formepdf/react @formepdf/cli

# Compile all templates
for f in templates/*.tsx; do
  npx forme build --template "$f"
done

# Deploy the .json files to your container volume

Authentication

Optional. If FORME_API_KEY is not set, the API is open — suitable for local development or internal network use behind a firewall. If set, all /v1/* endpoints require:

Authorization: Bearer your-secret-key

The /health endpoint is always public.

# Start with auth enabled
docker run --rm -p 3000:3000 -e FORME_API_KEY=my-secret formepdf/forme:latest

# Requests require the key
curl -X POST http://localhost:3000/v1/render/invoice \
  -H "Authorization: Bearer my-secret" \
  -H "Content-Type: application/json" \
  -d '{ "data": { "customer": "Acme" } }' \
  --output invoice.pdf

Configuration

All configuration is via environment variables. No config files.

Variable	Default	Description
`HTTP_PORT`	`3000`	Port the server listens on
`FORME_API_KEY`	(none)	If set, enables Bearer token auth on all `/v1/*` endpoints
`FORME_TEMPLATES_DIR`	(none)	Path to directory of pre-compiled `.json` templates
`RASTERIZER_URL`	`http://localhost:3001`	URL of the PDFium rasterizer sidecar

SDK Configuration

All Forme SDKs support a custom base URL. Point them at your self-hosted instance:

import { FormeClient } from "@formepdf/sdk";
const client = new FormeClient({
  baseUrl: "http://localhost:3000",
  apiKey: "your-key",
});

import formepdf
client = formepdf.Client(base_url="http://localhost:3000", api_key="your-key")

import forme "github.com/formepdf/forme-go"
client := forme.New("your-key", forme.WithBaseURL("http://localhost:3000"))

Deployment Examples

Kubernetes

apiVersion: apps/v1
kind: Deployment
metadata:
  name: forme
spec:
  replicas: 3
  selector:
    matchLabels:
      app: forme
  template:
    metadata:
      labels:
        app: forme
    spec:
      containers:
        - name: forme
          image: formepdf/forme:latest
          ports:
            - containerPort: 3000
          env:
            - name: FORME_API_KEY
              valueFrom:
                secretKeyRef:
                  name: forme-secrets
                  key: api-key

Stateless — scales horizontally with no coordination needed.

With templates in Kubernetes

Mount templates from a ConfigMap or persistent volume:

volumes:
  - name: templates
    configMap:
      name: forme-templates
containers:
  - name: forme
    volumeMounts:
      - name: templates
        mountPath: /templates
    env:
      - name: FORME_TEMPLATES_DIR
        value: /templates

Scope

The container is a pure render server: PDF in/out over HTTP, stateless, nothing persisted. Template management (editing, versioning, storage) lives in your codebase and deploy pipeline — compile .tsx to JSON in CI and mount the output, the same way you ship any built artifact. There is no queue, no webhook system, and no built-in document store; if you need those, compose them from your own infrastructure around the container.

Comparison

	Gotenberg	Forme Self-Hosted
Dependencies	Chromium + LibreOffice	None
Image size	~1GB	~50MB
Cold start	2-5s	~64ms (edge isolate) / ~110ms (Node)
Input	HTML, Markdown, Office docs	JSX templates (compiled to JSON)
Page breaks	Chromium-dependent	Engine-native
AcroForms	No	Yes
Digital certification	No	Yes
Redaction	No	Yes
PDF merging	No	Yes
Rasterization	No	Yes
PDF/UA	No	Yes
PDF/A	No	Yes

Gotenberg converts existing documents (HTML, Word, etc.). Forme generates from code templates. Different tools for different jobs.

Getting Started

Template Library

Reference

API Reference

Concepts

Enterprise

SDKs

Guides

Changelog

Self-Hosting

Quick Start

Docker run

Docker Compose

Health check

API Endpoints

Inline render

Template render

Certify

Redact

Merge

Rasterize

Compiling Templates

Authentication

Configuration

SDK Configuration

Deployment Examples

Kubernetes

With templates in Kubernetes

Scope

Comparison

​Quick Start

​Docker run

​Docker Compose

​Health check

​API Endpoints

​Inline render

​Template render

​Certify

​Redact

​Merge

​Rasterize

​Compiling Templates

​Authentication

​Configuration

​SDK Configuration

​Deployment Examples

​Kubernetes

​With templates in Kubernetes

​Scope

​Comparison

Quick Start

Docker run

Docker Compose

Health check

API Endpoints

Inline render

Template render

Certify

Redact

Merge

Rasterize

Compiling Templates

Authentication

Configuration

SDK Configuration

Deployment Examples

Kubernetes

With templates in Kubernetes

Scope

Comparison