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File basicsExtensions, formats, sizes and errors explained from zero
Archives and app filesZIP, RAR, 7Z, ISO, BIN, APK, EXE and other containers · 1 pages
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Plain answers about file extensions: what a file is, how to open it on your phone or computer, how to convert it, and how to stay safe while you do.

File basics0
Documents and email0
Archives and app files1
Images and design0
Data, web and code0
CAD, 3D and maps0
Video and audio0
Converting files0
Document passwords0

Every page is written and checked by our editors. Steps can differ between app versions and phone makers. For tax and identity documents, the official websites have the final word.

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