Identify unknown files at a binary level, or use the robust PDF suite to merge, split, and lock documents — no server uploads required.
Combine multiple PDF files sequentially into one single document.
Extract a specific page from a large PDF to create a new single-page document.
Encrypt your PDF with a strong password to prevent unauthorized viewing.
We read the first bytes of your file — not just the extension — to catch disguised files.
Everything runs inside your browser via APIs. Nothing is ever uploaded or transmitted.
Detection and processing happen in milliseconds using your local CPU power.
Drag files into the detector or pick PDFs to manipulate from your local storage.
Javascript reads binary signatures or uses PDF-lib to manipulate bytes directly in memory.
Get instant identification reports or a newly processed PDF downloaded right back to you.
Free forever. No account. No uploads.