# pdftk > PDF toolkit. > More information: . - Extract pages 1-3, 5 and 6-10 from a PDF file and save them as another one: `pdftk {{input.pdf}} cat {{1-3 5 6-10}} output {{output.pdf}}` - Merge (concatenate) a list of PDF files and save the result as another one: `pdftk {{file1.pdf file2.pdf ...}} cat output {{output.pdf}}` - Split each page of a PDF file into a separate file, with a given filename output pattern: `pdftk {{input.pdf}} burst output {{out_%d.pdf}}` - Rotate all pages by 180 degrees clockwise: `pdftk {{input.pdf}} cat {{1-endsouth}} output {{output.pdf}}` - Rotate third page by 90 degrees clockwise and leave others unchanged: `pdftk {{input.pdf}} cat {{1-2 3east 4-end}} output {{output.pdf}}`