I am using Thymeleaf + Flying Saucer for generating PDF files. How can I make non-editable PDF using Flying Saucer?
This is a frequent question with a NO answer since a PDF could not be a viewable valid PDF unless it is composed of editable binary objects. The ONLY way a PDF is "non editable" is if it is corrupt (invalid) or (100% valid) locked against viewing by anyone other than the source owner.
As soon as a PDF is decrypted for viewing it is available for manipulation by any PDF reader/editor such as Acrobat or one that ignores DRM.