How can I convert a PDF into a series of Images (JPGs or PNGs) via the terminal on mac?

I have a pdf

and I'd like to convert it to a series of images, numbered 0001.jpg - XXXX.jpg ?

I found this so far

sips -s format png your_pdf_file.pdf --out your_png_file.png

but it seems to only to the first page of the pdf, and the quality of the outputted png seems not so good. Any suggestions?

2

4 Answers

Alternatively you can use ghostscript which is on every mac preinstalled (and what is what imagemagic uses under the hood)

gs -dSAFER -dQUIET -dNOPLATFONTS -dNOPAUSE -dBATCH \ # When converting multiple-page PDFs you should add "%d" to the filename-string # which will be replaced with the sequence-number of the file -sOutputFile="outputFileName" \ # Create a PNG-File with alpha-transparency -sDEVICE=pngalpha # resolution in DPI -r72 \ # Use high grade text antialiasing. Can be 0, 1, 2 or 4 -dTextAlphaBits=4 \ # Use high grade graphics anti-aliasing. Can be 0, 1, 2 or 4 -dGraphicsAlphaBits=4 \ # If you are converting a CMYK-PFD to RGB-color you should use CIE-Color -dUseCIEColor \ # use the PDFs Trim-Box to define the final image -dUseTrimBox \ # start converting on the first side of the PDF -dFirstPage=1 \ # convert only until the first page of the PDF -dLastPage=1 \ # Path to the file you want to convert InputFile.pdf

For more information on how to use the CLI-Parameters, have a look at

4

You can use convert ( ImageMagick ) to parse PDF files.

PNG output

Convert test.pdf to numbered PNG images:

convert -density 150 -trim test.pdf page%d.png

JPEG output

Convert test.pdf to numered JPEG images:

convert -density 150 -trim test.pdf -quality 100 -flatten -sharpen 0x1.0 page%d.jpg

As per @JBWhitmore's explanation from his great answer):

convert \ -verbose \ -density 150 \ -trim \ <your-PDF-file>.pdf \ -quality 100 \ -flatten \ -sharpen 0x1.0 \ page%d.{png,pdf}

It results in the left image. Compare this to the result of my original command (the image on the right):

  

(To really see and appreciate the differences between the two, right-click on each and select "Open Image in New Tab...".)

Also keep the following facts in mind:

• The worse, blurry image on the right has a file size of 1.941.702 Bytes (1.85 MByte). Its resolution is 3060x3960 pixels, using 16-bit RGB color space.
• The better, sharp image on the left has a file size of 337.879 Bytes (330 kByte). Its resolution is 758x996 pixels, using 8-bit Gray color space.

So, no need to resize; add the -density flag. The density value 150 is weird -- trying a range of values results in a worse looking image in both directions!

4

ImageMagick

The easiest way is to use ImageMagick. Install ImageMagick if you haven't already

brew install imagemagick --with-fontconfig --with-ghostscript --with-openjpeg --with-webp 

Convert the PDF document into a series of images

convert -quality 100 -density 200 -colorspace sRGB "The_Artificial_Intelligence_Crush_2018.pdf" -flatten output-%02d.jpg

More details on producing sharp, high-quality image using ImageMagick.

Ghostscript

ImageMagick uses Ghostscript in the background to perform the PDF conversion. So why not use Ghostscript directly?

gs -dNOPAUSE -sDEVICE=jpeg -r200 -dJPEGQ=100 -sOutputFile=document-%02d.jpg "The_Artificial_Intelligence_Crush_2018.pdf" -dBATCH

Reference

Convert PDF to image with high resolutionHow to convert multi-page PDF to images in command lineHow to convert a PDF document into Powerpoint slides

just rename sample.pdf to sample.zip and then unzip sample.zip - it will create a folder with the images

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