PDFto.Tools

🚀 PDFto.Tools is a powerful, client-side PDF toolkit built with WebAssembly (WASM). Convert PDFs to DOCX, PNG, Excel, CSV, PPT, and more—all locally in your browser. No server-side processing means your data remains 100% private and secure.

Note: This project offers a web interface only and does not provide a public API. If you need to integrate it into your own system, feel free to fork the repository and adapt the source code to your needs.

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Live Demo

• Official Website: https://pdfto.tools

All conversions run directly in your browser, so you can convert sensitive files with complete peace of mind.

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How to Use

1. Choose a tool: Select a conversion format from the sidebar, like "PDF to PNG."
2. Upload your file: Click the "Upload" button or drag and drop your PDF into the designated area.
3. Wait for the conversion: The process starts automatically. Large files might take a few moments to process.
4. Download your file(s): Once finished, download your converted files individually or as a single ZIP archive.

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Why PDFto.Tools?

• 100% Private: All operations happen locally in your browser. Your files are never uploaded to a server, and we don't collect any user data.
• Fast and Efficient: Powered by WebAssembly, our tools are fast and resource-friendly, handling even large PDFs with ease.
• Easy Deployment: No complex backend setup required. Deploy it as a static site or use Cloudflare Workers for a seamless setup.

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Deployment

Deployment

Cloudflare Workers

This project is pre-configured with a wrangler.toml file for easy deployment to Cloudflare Workers, providing a global CDN and HTTPS out of the box.

Note: Before deploying, make sure you have a Cloudflare account and have configured your account_id in the wrangler.toml file.

# 1. Fork and clone the repository
$ git clone https://github.com/your-username/tools.git
$ cd tools

# 2. Install the Wrangler CLI
$ pnpm i -g wrangler

# 3. Log in to your Cloudflare account
$ wrangler login

# 4. Deploy to Workers
$ wrangler deploy

After deploying, you can access your instance via the domain assigned by Cloudflare, such as: https://pdfto-tools.<your-account>.workers.dev

If you have a custom domain, you can configure it for this Worker in your Cloudflare Dashboard.

Static Site Hosting

You can also deploy this project as a static site on any platform like Cloudflare Pages, Vercel, or Netlify.

# 1. Install dependencies
$ pnpm install

# 2. Build the project
$ pnpm build

Once the build is complete, upload the dist/ directory to your static hosting platform.

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Key Features

Feature	Description
Zero Server-Side Dependencies	All conversion logic runs in the browser. No files are ever uploaded or collected.
Multiple Output Formats	Supports DOCX, PNG, XLSX/CSV, PPTX, and more.
Stream-Powered Processing	Handles large files smoothly with WASM and the Streams API.
Open Source & Customizable	Feel free to fork, modify, or embed it in your own web applications.

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How It Works

The magic behind PDFto.Tools is WebAssembly (WASM). We compile mature, battle-tested PDF libraries (like PDFium and LibreOffice) into a format that runs directly in the browser. When you upload a file, the entire process happens inside a secure browser sandbox:

1. File Reading: The browser reads your local PDF file using the FileReader or Streams API.
2. WASM Initialization: JavaScript passes the file data to the WASM module.
3. Core Processing: The WASM module processes the file in an isolated memory space, converting it into your desired format (e.g., a PNG image or a DOCX document).
4. Result Hand-off: The WASM module returns the converted file data back to JavaScript.
5. Download: The browser serves the result back to you as a downloadable file using a Blob or FileSaver.js.

This architecture not only guarantees absolute data privacy but also leverages the full power of modern browsers to deliver performance that rivals native applications.

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Status & Roadmap

• Current Status: Beta - The core features are ready to use, but you might encounter a few bugs.
• Roadmap:
  • PDF ➜ JPG/WEBP Conversion
  • PDF Compression
  • PDF Merging & Splitting
  • UI/UX Enhancements

We'd love your feedback! Feel free to open an Issue or submit a Pull Request.

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Tech Stack

• WebAssembly (WASM): Core Conversion Engine
• TypeScript + Vite: Frontend Development & Bundling
• Wrangler: Cloudflare Workers Deployment
• Playwright: E2E Testing

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Local Development

# 1. Install dependencies
$ pnpm install

# 2. Start the local dev server
$ pnpm dev

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Browser Compatibility

Browser	Required Version
Chrome	94+
Edge	94+
Firefox	90+
Safari	15+

Mobile browsers must support WebAssembly and ReadableStream.

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Contributing

Contributions of all kinds are welcome! If you'd like to get involved, please follow these steps:

1. Fork this repository.
2. Clone your forked repository to your local machine.
3. Install dependencies:

   $ pnpm install

4. Create a new branch:

   $ git checkout -b feature/your-awesome-feature

5. Make your changes and commit them:

   $ git commit -m 'feat: Add your awesome feature'

6. Push to your remote repository:

   $ git push origin feature/your-awesome-feature

7. Open a Pull Request.

Before submitting, please ensure your code passes the lint and test checks:

# Run the linter
$ pnpm lint

# Run tests
$ pnpm test

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License

This project is released under the MIT License.