How Does In-Browser Forensic Document Recovery Work?
When a PDF or document file becomes corrupted—whether due to an incomplete download, disk bad sector, or interrupted transfer—the file standard reader fails because cross-reference (xref) tables, catalog dictionaries, or trailer signatures are damaged.
1. Binary Stream Scanning
The engine reads raw file bytes in Web Workers and scans for object markers (N G obj) ignoring damaged index tables.
2. Xref & Tree Reconstruction
Reconstructs fresh cross-reference maps, rebuilds page tree nodes, and decompresses surviving streams (Flate, DCT, ASCIIHex).
3. Clean PDF Assembly
Assembles valid catalog headers and outputs a newly structured PDF document with digital SHA-256 integrity verification.