Pandoc vs Zamzar API

Pandoc is a command-line document converter and Haskell library, offered for free under the GPL. It converts among markup and word-processing formats including Markdown, HTML, LaTeX, Word DOCX, EPUB, and Jupyter notebooks. Readers parse a source into an abstract syntax tree, which writers then turn into the selected output format. Templates and Lua filters let users adjust processing, and Lua can also be used to create custom readers and writers. Pandoc formats citations and can produce bibliographies with hundreds of CSL styles. PDF output uses LaTeX by default, though users can specify another PDF engine. Installers or binaries are provided for Windows, macOS, and Linux, with package-manager and source installation also documented. It can be run through GitHub Actions or GitLab CI/CD, and official Docker images are available. The official Linux executable is statically linked without dynamic dependencies or external data-file dependencies. Pandoc has no graphical interface; conversions from more expressive formats can lose information, and complex tables may not fit its document model.

Zamzar API is a REST-based HTTP service for adding file conversion to mobile, web, or desktop applications. It supports more than 1,100 conversion types across documents, video, images, audio, eBooks, CAD, 3D, and compressed files. Files can come from a user's machine or be reachable through HTTP, FTP, SFTP, or Amazon S3. Zamzar says its cloud service can handle demand from one file to 10,000. Developers can use official Java, PHP, and Python SDKs, plus code samples for C#, cURL, Node.js, and other languages. The free Test plan costs nothing, requires no card, and includes 100 credits, a 1 MB maximum file size, one-day file storage, and a three-day support response. Paid plans start at $25 /month. Successful conversions use at least one credit, and unused monthly credits do not roll over. Zamzar describes the API as a conversion service, not a CDN; converted files should be retrieved through the API. Accounts include free sandbox testing subject to file-size and job-count limits.