PDFZilla is a famous tool which can help you to convert from PDF to other formats like DOC, XLS etc.. It supports other features like merging, rotating, delete pages etc. too.
Convert PDF to Word, Excel, RTF, text, Images (BMP, JPG, GIF or TIF ), HTML, SWF,
Convert to PDF from Images (JPEG, GIF, PNG, TIFF, Bitmap, PSD, ICO, PPM, TGA)
Rotate, Merge and Cut PDF Files
Convert all the pages, or partial pages of PDF file.
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