Here are a few of the best free video converters (such as for MP4 and AVI files), audio converters (MP3s, WAVs, etc.), image converters (e.g., files that end with PSD, JPG, and PNG), and document converters (PDF, DOCX, etc.). Many video converters also convert DVD and BD movies into various other video formats such as MP4, FLV, AVI, etc. Some of these output formats are ideal for use on mobile devices. Dozens of fantastic, completely free video converters are available. Among these high-quality, completely free audio converters, you’ll find many that are online, which means you can use the software from right inside your web browser. Many image converters also feature batch operation, allowing you to convert several files into a particular format all at once. Some of the best available are completely free, and some even work entirely online so you don’t have to download anything.  Most document converters support common formats such as DOC, DOCX, PDF, PPT, PPTX, TIF, TXT, WKS, XLS, XLSX, and much more. Some can even convert image formats with text information to actual text-based files, allowing you to edit the information you couldn’t before. This is called optical character recognition (OCR). There’s no need to buy a program when you can use any of these at absolutely no cost. These disc image converters (ISO, IMG, etc.), font converters (TTF, OTF, DFONT, etc.), compressed file converters (ZIP, RAR, 7Z, CAB, etc.), and much more are all available free of charge. If you’re not sure what file type you need to convert, and none of the previously discussed converters were useful, one of these miscellaneous converters might be helpful.