The Ghostscript arguments are assembled as a plain array and passed to execFile, rather than being interpolated into a single shell command string.
Node.js's own documentation for execFile confirms it spawns the named command directly, passing the given arguments array to the process without invoking a shell. Child process | Node.js Documentation
PDF to GIFConvert Only A Few PDF Pages To GIF
PDF to GIF only pushes a -sPageList argument onto its Ghostscript arguments array when the submitted page selection is not an empty string.
Upload the PDF file to the conversion form.
Select each specific page number you actually want included in the final converted output.
Submit the form to start the conversion process.
Confirming Your Selected Pages
Download the resulting ZIP file from the results screen.
Open the ZIP archive to inspect the contents.
Match each individually extracted filename carefully against the exact page numbers you had originally selected.
Count the GIF files inside the archive to match your selection.
Continue with PDF Extension Requirements or PNG Intermediate Step.
Frequently Asked Questions about Convert Only A Few PDF Pages To GIF
How do I select specific pages for conversion?
Tick each page number you want converted before submitting.
Where do I find the converted files?
Locate the download link once processing finishes.
How do I verify the correct pages were converted?
Compare the archive contents against your original page list.
What should I do if I want to convert all pages?
Leave the page selection field empty before submitting.
Can I select non-consecutive pages in one run?
Tick each scattered page individually before submitting the selection.