PDF Ninja - Merge, Split, Compress & Organize PDF

Privacy-first local PDF toolkit: merge, split, compress & page management. Files never leave your device.

Merge, split, compress, and reorganize PDF files right inside your browser. 100% local processing — no uploads, no account. PDF Ninja is a privacy-first PDF toolkit — fast, precise, and it leaves no trace on any server. ► Everything runs on your device Every PDF operation happens entirely inside your browser. Your files never leave your computer. ► No uploads, no account, no sign-in ► Handle contracts, financial reports, and personal documents with zero risk of leaks ► No file size limit ► Merge ► Upload multiple PDFs at once ► Drag to reorder before merging ► Custom output filename with a {date} token ► Bookmarks (outlines) fully preserved in the merged file ► Split ► By fixed page count — every N pages ► By bookmark level — split at each chapter or section ► By manual split points — click between pages to cut exactly where you want ► Check the segments you want and export only those ► Page management ► Rotate, delete, and reorder pages visually ► Extract selected pages into a brand-new PDF ► Arrow-key navigation for fast browsing ► Batch selection for multi-page operations ► Compress ► Import a single PDF and choose a compression level ► Three presets — Light, Balanced, Strong — pre-compressed in the background so switching is instant ► See the real output size and how much you save before you download ► Only downloads count toward the free quota ► Free & Pro ► Free: 3 saves per day — merge, split, compress, and page management share one daily counter that resets every day ► Pro: unlimited saves; one license unlocks both PDF Ninja and IG Saver ► Upgrade through a shared checkout page; a license activates on up to 3 devices ► Built for real work ► Session auto-save — reopen your browser and pick up right where you left off ► Keyboard shortcuts — Ctrl+Enter to run, Ctrl+B to collapse the side rail ► Clean dark interface, easy on the eyes for long sessions ► Privacy first ✓ 100% local PDF processing ✓ No ads ✓ No account ✓ No tracking Your PDF files are processed entirely on your device and are never uploaded. The extension contacts a server only when you choose to activate a Pro license (see note below). ► Why local matters Most online PDF tools upload your files to a remote server to process them. That means your contracts, invoices, and private documents pass through someone else's machine. PDF Ninja never does this — every page is processed locally in your browser, so sensitive documents never travel across the internet. ► 15 languages English · 繁體中文 · 简体中文 · 日本語 · 한국어 · Deutsch · Français · Español · Português · Bahasa Indonesia · Русский · Türkçe · Italiano · ภาษาไทย · Tiếng Việt Note PDF Ninja processes your PDF files locally on your device — file contents and file names are never uploaded. The only network request happens when you actively enter a license key to activate Pro: the license key and a device fingerprint (a non-reversible hash of your browser and OS characteristics) are sent to takomi.dev to verify the license and count device activations. No PDF content or personal data is ever transmitted. If you never activate a license, the extension makes no network requests at all.