Questions, answered.

Short answers about using Interleaf in your browser.

How does client-side processing work?

Interleaf uses JavaScript libraries that run entirely in your browser. When you choose a PDF or image, the browser reads it into memory and processes it locally. No data is sent to a server.

Is my data private?

Yes. Your files never leave your device. There are no uploads, server-side processing, or data collection. You can verify this in your browser's developer tools by inspecting the network tab.

Which browsers are supported?

Interleaf works in modern Chrome, Firefox, Safari, and Edge browsers. Use the latest version for the best experience.

Is there a file size limit?

There is no universal file size limit, but operations run in your browser's available memory. Very large files, and image exports that create very large archives, may be slower or stop depending on your device.

Is Interleaf free to use?

Yes. Interleaf is free and open source. There are no premium tiers, subscriptions, or hidden costs.

Can I contribute to the project?

Yes. Interleaf is open source and hosted on GitHub. You can report issues, suggest features, or submit pull requests.

Does Interleaf work offline?

Once the page is loaded, most operations work without an internet connection. You need to be online to load the application initially.

What PDF operations are supported?

Interleaf currently supports opening PDFs and PNG or JPEG images together, adding more files, reviewing, extracting selected pages, reordering, rotating, marking pages for deletion, exporting selected or active pages as PNG images, unlocking password-protected PDFs, and losslessly compressing an untouched, single uploaded PDF. All operations run in your browser.