We have found one software suitable in our database for this conversion.
Pretty much every document or graphics file can be exported as PDF document and same goes for the contents of databases, including of course SQLite 2.0 databases (.sl2). You just have to use some database software that can open .sl2 and and use the commonly available PDF export function, or just virtual PDF printer.
Updated: August 9, 2023
SL2
Files with sl2 extension are databases in one of the SQLite formats, most likely version 2. SQLite is a relational database management system.
PDF
A pdf file extension is mainly used for Adobe Portable document format, commonly referred to as PDF. All programs that create some sort of documents or projects offer the possibility to export their format to PDF format. A free PDF viewer (Adobe Reader) is available for download from Adobe website.