Welcome to SimplyFill
Fill PDF forms from your app's data in one API call.
Welcome to SimplyFill
Stop hand-mapping PDF fields. SimplyFill lets you upload a PDF template once, map its fields, then fill it on-demand with data already flowing through your application.
Why SimplyFill?
PDFs remain the universal format for contracts, applications, and official documents. But manually populating them is tedious and error-prone. SimplyFill transforms this pain point into an API call.
- No manual field mapping on every document — Define aliases once per template
- Capture the organics — Use data already in your app without restructuring
- Typed responses — Get back a filled PDF or fail fast with clear errors
- Developer-first — Clean REST API, SDKs for Node.js and Python
Quick example
Given a PDF with fields like name, email, and company, send a single request:
curl -X POST https://api.simplyfill.app/v1/generate \
-H "Authorization: Bearer ***" \
-H "Content-Type: application/json" \
-d '{
"template": "contract-template",
"data": {
"name": "Ada Lovelace",
"email": "ada@example.com",
"company": "Analytical Engines Inc"
}
}'Node.js:
import { SimplyFill } from '@simplyfill/node'
const client = new SimplyFill({ apiKey: process.env.SIMPLYFILL_API_KEY })
const pdf = await client.generate({
template: 'contract-template',
data: {
name: 'Ada Lovelace',
email: 'ada@example.com',
company: 'Analytical Engines Inc'
}
})Python:
from simplyfill import SimplyFill
import os
client = SimplyFill(api_key=os.getenv("SIMPLYFILL_API_KEY"))
pdf = client.generate(
template="contract-template",
data={
"name": "Ada Lovelace",
"email": "ada@example.com",
"company": "Analytical Engines Inc"
}
)You'll receive a signed URL to download the filled PDF within seconds.
Next steps
- Get your API key — Takes 30 seconds
- 5-minute quickstart — Fill your first PDF
- Complete walkthrough — Upload, map, and generate