3-Heights PDF Analysis & Repair Tool vs DiskInternals ZIP Repair

3-Heights PDF Analysis & Repair Tool analyzes damaged PDF documents and attempts to repair or recover their contents. It inspects objects, page trees, and content streams, then can report error types, codes, descriptions, page numbers, and event counts, with messages written to a log. Repair options include restoring data streams, fonts, cross-reference tables, pages, and images; recovery can rebuild a PDF from legible content that remains. It reads encrypted PDFs and can encrypt restored files with permission flags. Inputs include PDF 1.x, PDF 2.0, and PDF/A-1, PDF/A-2, and PDF/A-3; the manuals cite ISO 32000-1 and ISO 32000-2 conformance. Pdftools documents Shell command-line and API variants, with Windows, Linux, and macOS support and local repair delivery. Batch repair is supported. The product is paid, with pricing on request and a 30-day trial. The evaluation version analyzes files but disables Save As, so repaired or recovered files cannot be saved or viewed without the full version. The vendor cautions that some files and image compression methods cannot be recovered.

DiskInternals ZIP Repair is a free Windows program that recovers contents from damaged ZIP archives. After an archive is selected, its wizard-based process scans for damage and transfers intact files into a new archive. Built-in extraction handles partially damaged and restored files. DiskInternals says the tool supports all major ZIP capabilities and files of any size. Recovered data can be saved to any disk visible to Windows, including network disks. The program is aimed at cases such as transmission errors or media damage affecting ZIP files. The product page identifies it as freeware and lists a free download. It shows version 1.1, last updated September 17, 2021. Support requests use a ticket system with a unique ticket number and online progress tracking, and a valid email address is required. DiskInternals describes site protections using firewalls and password controls, with customer-information access limited to authorized individuals. No third-party integrations are listed on the reviewed product pages.