PDF Diff

> 🔒 Compare PDF documents privately and securely in your browser. No uploads, no servers, 100% client-side processing.

![Live Demo](https://www.pdf-diff.com)
![License](LICENSE)
![GitHub stars](https://github.com/jamesmontemagno/pdf-diff/stargazers)

!PDF Diff Screenshot

Try it now at www.pdf-diff.com →

✨ Features

$3

- 100% Private & Secure - Your PDFs never leave your device
- No Server Uploads - Zero data transmission, zero risk
- Works Offline - Once loaded, no internet connection required
- Open Source - Inspect the code yourself to verify our privacy claims

$3

- Side-by-Side View - Compare documents with synchronized scrolling
- Unified View - See all changes inline with color coding
- Additions Only - View only what was added
- Removals Only - View only what was removed
- Changes Only - See additions and removals side-by-side per page

$3

- CLI Support - Use via npx pdf-diff for command-line comparisons
- Multi-Page Support - Compare entire documents page by page
- Show All Pages - View all changes across all pages at once
- Export to PDF - Save comparison results as a formatted PDF report
- Page Navigation - Quick navigation between pages
- Statistics Dashboard - Get instant insights on changes
- Dark/Light/System Theme - Choose your preferred appearance
- Visual HTML/PDF Reports - Generate shareable diff reports

$3

- Responsive Design - Works perfectly on desktop, tablet, and mobile
- Drag & Drop - Easy file upload with drag and drop support
- Real-time Processing - Instant comparison results
- Clean Interface - Intuitive and clutter-free design

🚀 Getting Started

$3

Compare PDFs directly from your terminal with zero installation:

``bash

`Basic comparison`


npx pdf-diff original.pdf modified.pdf
Generate only HTML report

npx pdf-diff original.pdf modified.pdf --report html
CI-friendly: exit with code 1 if differences found

npx pdf-diff original.pdf modified.pdf --fail-on-diff
Output as JSON for programmatic use

npx pdf-diff original.pdf modified.pdf --format json
Interactive mode

npx pdf-diff --interactive


#### CLI Options

| Option | Description | Default | |--------|-------------|---------| |-r, --report | Report type: html, pdf, or both | both| |-o, --out

| Output directory for reports | ./pdf-diff-report

|
|

--open / --no-open | Open HTML report in browser after completion | --open

|
|

-f, --format | Output format: text, json, or junit | text

|
|

--fail-on-diff

 | Exit with code 1 if differences are found | - |
|

-p, --pages | Pages to compare (e.g., 1-3,5,7

) | All pages |
|

-t, --threshold

 | Change percentage threshold for failure | - |
|

-i, --interactive

 | Interactive mode with guided prompts | - |
$3
1. Visit www.pdf-diff.com
2. Upload or drag your original PDF
3. Upload or drag your modified PDF
4. View comparison results instantly
5. Switch between view modes as needed
6. Export results to PDF if desired
$3

`bash

`Clone the repository`


git clone https://github.com/jamesmontemagno/pdf-diff.git
cd pdf-diff
Install dependencies

npm install
Start development server

npm run dev
Build for production

npm run build
Preview production build

npm run preview
Run linter

npm run lint

🛠️ Tech Stack

- React 19 - Modern UI framework
- TypeScript - Type-safe development
- Vite - Lightning-fast build tool
- PDF.js - Mozilla's PDF rendering engine
- jsPDF - PDF generation for exports
- diff - Text comparison algorithm

🎨 Color Coding

- 🟢 Green - Additions (new content)
- 🔴 Red - Deletions (removed content)
- ⚪ White/Gray - Unchanged content

🔒 Privacy & Security

PDF Diff is built with privacy as the top priority:

1. No Server Communication - Files are processed entirely in your browser
2. No Data Storage - Nothing is saved or cached
3. No Tracking - No analytics or user tracking (except standard web analytics)
4. No Third-Party APIs - All processing happens locally
5. Open Source - Full transparency, audit the code yourself

🤝 Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

📄 License

MIT License - See LICENSE for details.

👨‍💻 Author

James Montemagno
- Website: montemagno.com
- GitHub: @jamesmontemagno
- Twitter: @JamesMontemagno

🌟 Show Your Support

Give a ⭐️ if this project helped you!

---

Start comparing PDFs now →

PDF Diff

> 🔒 Compare PDF documents privately and securely in your browser. No uploads, no servers, 100% client-side processing.

![Live Demo](https://www.pdf-diff.com)
![License](LICENSE)
![GitHub stars](https://github.com/jamesmontemagno/pdf-diff/stargazers)

!PDF Diff Screenshot

Try it now at www.pdf-diff.com →

✨ Features

$3

🚀 Getting Started

$3

Compare PDFs directly from your terminal with zero installation:

``bash

`Basic comparison`


npx pdf-diff original.pdf modified.pdf
Generate only HTML report

npx pdf-diff original.pdf modified.pdf --report html
CI-friendly: exit with code 1 if differences found

npx pdf-diff original.pdf modified.pdf --fail-on-diff
Output as JSON for programmatic use

npx pdf-diff original.pdf modified.pdf --format json
Interactive mode

npx pdf-diff --interactive


#### CLI Options

| Option | Description | Default | |--------|-------------|---------| |-r, --report | Report type: html, pdf, or both | both| |-o, --out

| Output directory for reports | ./pdf-diff-report

|
|

--open / --no-open | Open HTML report in browser after completion | --open

|
|

-f, --format | Output format: text, json, or junit | text

|
|

--fail-on-diff

 | Exit with code 1 if differences are found | - |
|

-p, --pages | Pages to compare (e.g., 1-3,5,7

) | All pages |
|

-t, --threshold

 | Change percentage threshold for failure | - |
|

-i, --interactive

 | Interactive mode with guided prompts | - |
$3
1. Visit www.pdf-diff.com
2. Upload or drag your original PDF
3. Upload or drag your modified PDF
4. View comparison results instantly
5. Switch between view modes as needed
6. Export results to PDF if desired
$3

`bash

`Clone the repository`


git clone https://github.com/jamesmontemagno/pdf-diff.git
cd pdf-diff
Install dependencies

npm install
Start development server

npm run dev
Build for production

npm run build
Preview production build

npm run preview
Run linter

npm run lint

🛠️ Tech Stack

🎨 Color Coding

- 🟢 Green - Additions (new content)
- 🔴 Red - Deletions (removed content)
- ⚪ White/Gray - Unchanged content

🔒 Privacy & Security

PDF Diff is built with privacy as the top priority:

🤝 Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

📄 License

MIT License - See LICENSE for details.

👨‍💻 Author

James Montemagno
- Website: montemagno.com
- GitHub: @jamesmontemagno
- Twitter: @JamesMontemagno

🌟 Show Your Support

Give a ⭐️ if this project helped you!

---

Start comparing PDFs now →

@jamesmontemagno/pdf-diff

PDF Diff

✨ Features

$3

$3

$3

$3

🚀 Getting Started

$3

Basic comparison

Generate only HTML report

CI-friendly: exit with code 1 if differences found

Output as JSON for programmatic use

Interactive mode

$3

$3

Clone the repository

Install dependencies

Start development server

Build for production

Preview production build

Run linter

🛠️ Tech Stack

🎨 Color Coding

🔒 Privacy & Security

🤝 Contributing

📄 License

👨‍💻 Author

🌟 Show Your Support

@jamesmontemagno/pdf-diff

PDF Diff

✨ Features

$3

$3

$3

$3

🚀 Getting Started

$3

Basic comparison

Generate only HTML report

CI-friendly: exit with code 1 if differences found

Output as JSON for programmatic use

Interactive mode

$3

$3

Clone the repository

Install dependencies

Start development server

Build for production

Preview production build

Run linter

🛠️ Tech Stack

🎨 Color Coding

🔒 Privacy & Security

🤝 Contributing

📄 License

👨‍💻 Author

🌟 Show Your Support

`Basic comparison`

`Clone the repository`

`Basic comparison`

`Clone the repository`