No document upload
PDF bytes stay in the browser. The application has no processing API or document WebSocket.
Local-first PDF workspace
Professional PDF tools. Your files never leave.
PDFPioneer combines one-click PDF tools with a persistent editor, local history, browser OCR, and privacy controls that can be independently tested.
Static deploymentOffline-capableNo account neededOpen engine adapter
Privacy activityLOCKED
ALLOW /workers/pdf.worker.min.mjs local asset
ALLOW blob:document-session local bytes
BLOCK https://external.example/upload cross-origin
Quick Tools
Complete one task fast.
Studio
Keep editing without re-uploading.
Local workers
PDF operations, OCR, image cleanup, and cryptography run in dedicated browser workers.
Recoverable history
OPFS snapshots and an append-only operation log power undo, redo, and crash recovery.
Verifiable privacy
A runtime guard and service worker block cross-origin requests from the editor.
Quick tools
Everyday PDF work without a server round-trip
Each tool uses the same local engine and can continue in Studio with history intact.
Merge PDF
Combine PDFs locally without uploading them.
Runs on your device
Split & extract
Export selected pages or every page as separate files.
Runs on your device
Rotate pages
Rotate any page and preserve the original file locally.
Runs on your device
Crop PDF
Set visible crop margins on selected pages with a clear non-redaction warning.
Runs on your device
Compress PDF
Rewrite PDF structure or create a smaller rasterized copy entirely in-browser.
Runs on your device
Repair PDF
Tolerantly open and rewrite malformed PDF structure in a fresh local file.
Runs on your device
Watermark PDF
Add a configurable text watermark to selected pages.
Runs on your device
Page numbers
Add page numbers with templates and placement controls.
Runs on your device
Images to PDF
Create a PDF from PNG or JPEG images in your browser.
Runs on your device
PDF to images
Render PDF pages to PNG or JPEG locally.
Runs on your device
Extract text
Export selectable PDF text to a local plain-text file.
Runs on your device
OCR PDF
Recognize text and add a searchable invisible text layer.
Runs on your device
PDF metadata
Inspect, edit, or remove document metadata.
Runs on your device
Flatten forms
Flatten AcroForm field appearances into page content locally.
Runs on your device
Sign PDF
Place a typed signature without creating an account.
Runs on your device
Beta
Scan cleanup
Enhance and threshold scanned images in a lightweight local worker.
Runs on your device
Optional add-on
Local AI
Install a separately audited add-on for private on-device document intelligence.
Separate add-on