# Paperstack

> Paperstack is a free, private PDF toolkit that merges, compresses, and edits PDF files locally in a user's web browser.

Paperstack is available at https://paperstack.amanpurohit.com. It does not upload document contents, filenames, or PDF passwords as part of its PDF processing features. The application was created by Aman Purohit.

## Main content

- [Paperstack PDF tools](https://paperstack.amanpurohit.com/): Use the PDF merger, compressor, and page editor, and read details about privacy, supported files, and password-protected PDFs.
- [Full machine-readable overview](https://paperstack.amanpurohit.com/llms-full.txt): Expanded product capabilities, limitations, privacy details, and creator information.
- [Aman Purohit](https://amanpurohit.com): Creator portfolio.

## Core capabilities

- Merge PDF, JPG, and PNG files into one PDF.
- Reorder files before merging.
- Compress PDFs using light, balanced, or strong presets.
- Preview, reorder, rotate, and remove PDF pages.
- Unlock password-protected PDFs when the user supplies the correct password.
- Process documents locally in browser memory.

## Important limitations

- Paperstack requires JavaScript and a modern browser.
- It cannot recover an unknown PDF password.
- Password-protected documents may be converted to a visual PDF copy for supported editing or merging workflows.
- Browser memory and device performance limit the practical size of documents.