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File formats, explained.

Guides to the files on your Mac: what they are, why they exist, and how to convert them without uploading anything.

How to convert PDF to Word on a Mac, and why some PDFs convert better

Free and offline ways to turn PDFs into editable Word files on a Mac, and why a PDF exported from Word converts cleanly while a scan or a printed PDF needs more work.

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How to convert EML to PDF on a Mac, one email or a whole mailbox

Free ways to save emails as PDF with Apple Mail, a one-step offline method for whole folders and mailboxes, and how chained conversions turn an email into a PDF via HTML.

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How to convert CSV to JSON offline on a Mac, and back again

Why uploading a spreadsheet to an online converter is a bigger deal than it looks, how to convert CSV and JSON locally on a Mac, and what actually changes between the two formats.

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How to convert HEIC to JPG on a Mac, and what HEIC actually is

Five ways to turn iPhone HEIC photos into JPGs on a Mac, plus what is inside a HEIC file, why it is half the size of a JPG, and what you lose when you convert.

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