Why no upload matters
Many online PDF tools require uploading documents to remote servers.
PDFs often contain invoices, contracts, IDs, medical documents, financial records, or private notes.
CrabPDF processes files locally in the browser.
There is no backend upload step for editing.
What runs locally
PDF rendering.
Text item detection.
OCR processing.
Inline text editing.
Find and replace.
Redaction export.
PDF serialization and download.
Private by design
CrabPDF is designed to run locally in your browser. The editing flow does not require uploading your PDF to a backend server. This makes it useful for quick local edits, OCR corrections, search and replace, and redaction experiments.
CrabPDF is experimental. Always verify important documents after editing or redaction.