PDFs that won't open. A horrible situation, no doubt. An error during download, a storage drive failure, malware, memory corruption... plenty of reasons. The most practical approach is to get a fresh copy of the file, but if you're out of options and need to know how to repair a corrupt PDF file, start by downloading a copy of PDF Fixer, which automates the process.
Corruption incidents have decreased in recent years thanks to more stable connections and robust storage media. The old combination of dial-up + diskette used to make us tremble: if the file wasn't downloaded with errors, the average floppy with its damaged sectors managed to ruin everything.
If you have a corrupt PDF, our first recommendation (and the fastest and least painful one) is to try to get a fresh copy. If it's an old manual or something similar, remember that Archive.org preserves many things once thought lost. However, if you want to process a batch of PDFs that won't open, or the document has been stored for years on a faulty floppy and you must rescue it, you can always try to repair it with PDF Fixer
How to repair a corrupt PDF file with PDF Fixer
From a technical standpoint, PDF Fixer acts as a frontend for two very popular tools, PDFTK and Ghostscript, along with the PDFium module (the same one Chrome uses to render PDFs). The interface offers few options, and it's enough to drag the corrupt PDF onto it. The only relevant options are three: Repair content, repair XREF tables (that's Ghostscript's job), and specify the destination path.
PDF Fixer includes a sample document with corrupted content in its last section, but the final result depends on how damaged the PDF you want to repair is. In the best case, you should always moderate expectations and aim for a partial recovery. Maybe a page or two get left behind, but if the rest comes back from the darkness, the result is more than positive.
https://old.neoteo.com/censurar-texto-en-pdf/PDF Fixer is a free program, has a portable edition, and works with all Windows versions starting from XP SP3, but it drags along a dependency on .NET Framework, something fairly common these days. In short, if you need to repair a corrupt PDF, give it a try with PDF Fixer.
Official website and download: Click here
