Why a scanned PDF has no text to select
You open a PDF, drag across a sentence, and nothing highlights. The file is not broken — it never contained text, only pictures of it.
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Long answers to the questions the tool pages can only hint at. No account, no newsletter, no five-paragraph introduction before the answer.
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Why a compressed PDF sometimes gets bigger
You run a file through a compressor and the result is larger than the original. It is not a bug in the button — it is a property of what was in the file to begin with.
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Merging PDFs without uploading them
Most online mergers send your document to a server and hand back a new file. The merge itself does not need a server — here is what changes when it happens inside the tab.
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