What is PDF?
PDF is a free online PDF toolkit that lets you merge, split, compress, password-protect, and extract pages from PDF files, or convert images into a single PDF document. Every operation runs entirely in your browser using PDFLib and PDF.js, so your documents never leave your device — no uploads, no waiting, no accounts.
PDFs are how finished work gets shared, yet most people still turn to desktop software or "upload your file" websites for simple changes. PDF covers the operations people actually need: combining scans and exports into one file, pulling out a few pages to email, shrinking a large document so it fits in an attachment, or locking a contract before sending it. Because everything is processed locally with PDFLib and PDF.js, even sensitive documents — tax forms, signed agreements, client deliverables — stay on your device.
Why Use a Client-Side PDF Tool?
Traditional online PDF tools require you to upload your files to their servers. This creates several risks: your sensitive documents could be stored, accessed by employees, or even breached in a data incident. Client-side tools like PDF solve this by processing everything locally in your browser. Your files never leave your device, giving you complete privacy and control.
Client-side processing also means faster results for small to medium files — there's no upload/download round-trip. The trade-off is that very large files (over 100MB) may be slower since your browser has limited memory compared to a server. For most everyday use cases, client-side tools offer the best balance of speed, privacy, and convenience.
Common PDF Operations Explained
Merging PDFs combines multiple documents into one file. This is useful when you have separate scans, exports from different applications, or want to bundle related documents together. The merge operation preserves the quality and formatting of each original page.
Splitting PDFs extracts specific pages or ranges from a larger document. Instead of sharing a 50-page report when you only need pages 12-15, you can split out just those pages into a new, smaller file.
Compressing PDFs reduces file size by optimizing images, removing unnecessary metadata, and streamlining the internal structure. This is particularly helpful when you need to email a PDF that's too large for attachment limits, or when you want to reduce storage usage.
Password protection encrypts your PDF so only people with the password can open it. This uses standard PDF encryption that works with any PDF reader. Choose a strong, unique password — the protection is only as good as the password you set.
How to Use PDF
- Choose a tool — Pick one of the tools from the grid: Merge, Split, Compress, Protect, Extract Pages, or Images to PDF.
- Add your files — Drag and drop or browse to select your PDF (or image) files. Files are read locally and are never uploaded anywhere.
- Adjust options — Set page order for merging, choose page ranges for splitting or extraction, or enter a password for protection.
- Process & download — Click the action button and wait a few seconds while your browser does the work, then download the finished PDF instantly.
Key Features
- Merge PDFs — Combine multiple PDFs into one file with full drag-to-reorder support.
- Split PDFs — Extract specific pages or ranges into separate PDF files.
- Compress — Reduce PDF file size for easier emailing and sharing.
- Password protect — Lock your PDF with a password so only authorized readers can open it.
- Extract pages — Pull out just the pages you need into a fresh document.
- Images to PDF — Turn JPG, PNG, and other images into a single clean PDF.
- 100% client-side — Your files never touch a server. Verified with the Network tab.
- Free, no signup — No accounts, no watermarks, no limits.