Open the screenshot on your device
Select the print or share option
Choose Save as PDF or Print to PDF
Select the destination folder
Save the file as a PDF
On Windows, open the screenshot and press Ctrl + P, then choose Microsoft Print to PDF
On Mac, open the screenshot and press Command + P, then choose Save as PDF
On iPhone, open the screenshot, tap Share, then select Print, zoom the preview, and save as PDF
On Android, open the screenshot, tap Share or Print, then choose Save as PDF
Use an online image to PDF converter if needed
Upload the screenshot, convert it, and download the PDF file