PDF Engineer: Offline Compressor & Editor

Compress, convert, merge, edit, annotate, scan OCR, and sign PDFs & images 100% offline.

Protect your data. Stop uploading sensitive files to cloud servers. PDF Engineer handles every PDF task entirely on your device — compress, merge, edit, convert, OCR, and sign — using local WebAssembly processing. Nothing is ever uploaded, no matter the file size, and no account is required. PROVE IT YOURSELF: Open DevTools → Network tab while using any tool. You'll see zero bytes uploaded, even on large files. WHY THIS MATTERS Most online PDF tools require uploading your invoices, contracts, and IDs to a remote server before they can process them. Even with a stated "auto-delete" policy, there's no way to verify what happens to your file in between. PDF Engineer removes that risk entirely — your documents never leave your computer. CORE FEATURES Compress - Reduce PDF or image file size to a target KB limit — useful for application forms, email attachments, or upload limits - No wait times, since there's no server round-trip Edit - Edit existing PDF text directly, add overlays, or highlight content - Insert clickable hyperlinks into any page - Run local OCR to make scanned documents instantly editable Convert & Merge - Merge multiple PDFs into one file - Convert between PNG, JPG, WEBP, and PDF in either direction Protect - Add custom text or image watermarks - Password-protect documents to restrict access PRIVACY We do not collect, track, or share your data. No tracking scripts, no third-party cookies, no server-side processing of any kind. Your files are yours — this is a design decision, not a policy promise. Free for 5 tasks per day, no signup required. Upgrade for unlimited use.