Pandoc is a free and open-source software document converter, widely used as a writing tool and as a basis for publishing workflows.

Zamzar is an online file converter.

Switch Audio File Converter allows you to convert common file types to a very comprehensive variety of audio output formats.

Online Convert is an online file conversion platform, convert files like images, video, documents, audio and more to other formats with this free and fast onl…

Free File Converter is an online web-based document to PDF converter software.