Looking for the least tedious way possible.
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Another option would be sejda-console (requires Java):
sejda-console pdftojpeg --files input.pdf --resolution 300 --output /outputdirectory
Usage: sejda-console pdftojpeg options --files -f value... : pdf file to operate on: a single pdf file (EX. -f /tmp/file1.pdf or -f /tmp/password_protected_file2.pdf:secret123) (required) [--help -h] : prints usage information. Can be used to detail options for a command '-h command' (optional) --output -o value : output directory (required) --outputPrefix -p value : prefix for the output files name (optional) [--overwrite] : overwrite existing output file (optional) [--resolution -r value] : resolution in dpi. Default is 72 (optional) [--userZoom -z value] : zoom factor for the generated images (EX. 1.5 generates images with a 150% zoom factor). (optional)
If you just want to quickly convert a single file and privacy is not a concern you can always use their web app instead.
If you have a Mac this is very easy to do using Automator. You just need three actions:
Ask for finder items Render PDF pages as images Move finder items You can even select the color model, format (12 available), resolution and compression quality. Just to test it out, I converted a PDF file I have here with 207 pages:
Using "600dpi/RGB/best quality possible" it took an hour to convert to JPEG. Using "300dpi/RGB/60% quality" it took about 5 minutes to convert to JPEG. (My laptop have a Core 2 Duo 2.26Ghz)