To repair a damaged PDF file: 1. Upload your unopenable document to PDFBlack. 2. The forensic engine parses raw binary streams and rebuilds corrupted xref tables and missing /Page dictionaries. 3. Download your recovered PDF with intact selectable text, tables, and images instantly.

Acrobat enforces strict compliance: if the final xref offset is broken or trailing bytes are missing, it blocks opening entirely. Our engine sweeps the file sequentially from byte 0, recovering all /Page, /Font, and /XObject dictionaries even when the trailer is completely lost.

Smart Repair executes a surgical structural rebuild fixing headers, cross-reference tables, and trailers. Deep Rescue activates on catastrophic corruption: it sweeps raw byte streams, salvages embedded images, and reassembles pages from scratch to recover maximum data.

100% safe. PDFBlack operates with 100% client-side architecture in your browser. Neither your damaged file nor the recovered PDF is ever uploaded to external servers or stored in the cloud. Binary parsing takes place purely in local RAM.

Yes. Unlike simple converters that rasterize pages into blurry images, PDFBlack preserves native vector paths, font dictionaries, and high-resolution images as long as stream objects are intact.

Yes. You can queue multiple corrupted files. The Web Worker recovers each document in isolation, allowing individual downloads or a combined .ZIP archive.