PDF Fixer

A lightweight web application that converts PDFs to be compatible with Document Builder using Ghostscript.

Uploaded files are re-processed with Ghostscript to produce a PDF 1.3, A4-sized, printer-quality output — and the converted file keeps its original file name.

Features

• Drag & drop or browse to upload a PDF
• Converts to PDF 1.3 (A4, printer quality) via Ghostscript
• Preserves original file names on download
• Responsive UI that works on mobile, tablet, and desktop
• Success and error feedback with a loading indicator
• Runs in Docker for easy deployment

Quick Start

Prerequisites

• Node.js 18+
• Ghostscript installed and available as gs

Run Locally

npm install
mkdir -p uploads outputs
npm start

Open http://localhost:3000 in your browser.

Run with Docker

docker build -t pdf-fixer .
docker run -p 3000:3000 pdf-fixer

API

POST /convert

Upload a PDF file as multipart form data with the field name pdf.

Returns the converted PDF with the original file name preserved.

Example with curl:

curl -X POST -F "pdf=@myfile.pdf" http://localhost:3000/convert --output myfile.pdf

Tech Stack

• Node.js + Express — web server
• Multer — file upload handling
• Ghostscript — PDF conversion
• Tailwind CSS (CDN) — UI styling

License

ISC