matches the first line of the above block ( q 9 0 0 9 2997 4118.67 cm) and all following 95,881 characters, i.e., the watermark's stream.Ĭlicking Replace All removes it from all pages of the PDF file.
Press Ctrl + H and set the following: Find: q 9 0 0 9 2997 4118\.67 cm. The exact same stream is repeated on every page of the PDF file. Scrolling down until the pattern changes reveals that the watermark's stream is 95,906 bytes long (counting newlines). This particular block sets only one ( /W 1 /H 1) of the watermark's pixels. In this specific case, every page begins with the block q 9 0 0 9 2997 4118.67 cmĪnd nearly 4,000 blocks just like this one. Open uncompressed.pdf with Notepad++ to reveal the structure of the watermark. Uncompresses all streams, so they can be modified by a text editor. The command pdftk original.pdf output uncompressed.pdf uncompress This saves space, but it makes the PDF's source illegible. PDF streams are usually compressed using the DEFLATE algorithm.
Notepad++: a text editor capable of replacing Perl Compatible Regular Expressions.ĭownload Pdftk and extract pdftk.exe and libiconv2.dll to %windir%\System32, a directory in the path or any other location of your choice. Pdftk: a tool to (un)compress and fix PDF streams. Unfortunately, you have to repeat this for every page.Ī less time-consuming solution would be to remove the watermark programmatically. Since the watermark is actually composed of many tiny images, you can remove them with a PDF editor (e.g., Foxit Advanced PDF Editor), simply by selecting them and pressing Delete. This makes the watermark much more difficult to remove (and results in a rather bloated PDF file). As it turns out, PDFCreator hardcoded it (almost pixel by pixel) into every single one of them. However, the watermark of this specific PDF file (which the OP sent me via email) isn't a single image that is repeated on all pages. For example:Īll of these are free to try, but require a license to actually produce the desired output. For image-based watermarks, there are several tools that promise their automatic removal.
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