Inspect a PDF
Read and check a PDF without changing it.
PDF metadata editorSee and set title, author and keywordsCompare two PDFsSee what changed between two versionsPDF page count and file checkPage count, page sizes and scan check
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Look before you send
These tools answer questions rather than change files. How many pages is this really? Are the pages mixed sizes, which will ruin the printing? Does it still say "Draft copy — do not circulate" in its properties? What actually changed between the version you were sent and the version you signed?