Generate, fill, sign and process PDF documents with one API.
P4PDF turns your data into complete PDF documents. Render templates, fill dynamic fields, apply digital signatures and timestamps, embed attachments, and read QR or barcodes — all fully automated.
POST /api/sign
Authorization: Bearer <token>
Content-Type: application/json
{
"id": "ef2c...4d7a",
"signedHash": "iVB0Rw0KGgo..."
}Generate PDFs from templates
Upload a PDF template and define dynamic fields for text, images and barcodes. Map your data directly into placeholders and render consistent documents at scale.
Visual field mapping
Click and define text fields, images or barcodes directly on the PDF.
Dynamic data binding
Fill templates using structured JSON — no manual formatting.
Digital signatures & timestamps
Apply certificate-based signatures, add trusted timestamps (TSA), and automate hashing workflows with full cryptographic integrity.
Certificate-based signing
Support for external signers, HSM, smartcards or custom clients.
Trusted timestamps
Integrate with any TSA to add verifiable timestamp tokens.
Multiple signatures
Support for multi-party, multi-step signing workflows.
Embed file attachments
Store supporting documentation such as raw data, reports or logs directly inside the PDF to create verifiable document bundles.
Any file type
Attach binary files, datasets or custom audit outputs.
Evidence bundles
Keep measurements, logs and certificates in a single container.
Metadata support
Store attachment metadata for validation or audit trails.
Read QR & barcodes
Detect and extract QR codes, Datamatrix and other barcode types from any PDF page, including coordinates and orientation.
Multi-code detection
Scan pages with multiple QR/Datamatrix codes.
Coordinates & bounds
Extract the exact x/y position and size of each code.
Error correction
Robust decoding of damaged or low-quality codes.