Vue 3 and pdf-lib Can Power a Browser-Based PDF Repair Tool

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A browser-based PDF repair tool can be built using Vue 3, the Composition API, and the pdf-lib library to recover content from structurally corrupted files. The approach works because PDF page content streams are often intact even when structural elements like cross-reference tables or trailer objects are damaged. The tool attempts to copy each page individually into a new PDF document, skipping any unreadable pages rather than aborting the entire process. Key implementation details include setting the ignoreEncryption and updateMetadata flags to false during loading, reducing the risk of early failures on files with corrupted metadata or encryption dictionaries. Partial recovery — such as salvaging five of ten pages — is treated as a meaningful success, and the UI is designed to clearly communicate how many pages were retrieved.

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