sandbox parameter to true when starting with PDFShift, and in development mode.
When enabled, the sandbox parameter adds a watermark to your generated PDF, but does not count the conversions made via PDFShift.
That way, you can set up your code and run multiple tests without worrying about your remaining credits.
Once all is set, you can run a last test locally with the sandbox removed or set to false to ensure the PDF renders exactly like you want.
In case you forgot to set the sandbox parameter to true while working on your code, don’t worry, simply reach out to us and we’ll remove some of your credits usage for free during the first month :)