Marker
An open-source tool that converts PDFs, ePub, and more into clean Markdown quickly and accurately.
Marker converts documents (PDFs, ePub, office files) into clean Markdown, JSON, or HTML. It handles tables, equations, code blocks, and reading order well, and is built to run fast on a GPU.
It is open-source, with an optional hosted API for teams that would rather not run the models themselves.
Where it fits
A strong fit when you need fast, accurate document-to-Markdown conversion and can run it on your own GPU.
Where it does not fit
Best results lean on GPU access: less convenient for a purely CPU-bound or low-resource environment.
Alternatives to Marker
The closest options on the map, and where each fits instead.
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Docling Document parser
A strong fit when you want high-quality, fully local document parsing with no data leaving your environment.
Unlike Marker No hosted API
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MinerU Document parser
A fit when source PDFs are technical or scientific and formulas and tables must survive the conversion.
Unlike Marker No hosted API
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Unstructured Ingestion pipeline
The right tool when source content spans many file formats and you need one consistent ingestion path into a RAG pipeline.
Unlike Marker Maturity: established
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Surya OCR toolkit
A fit when you want modern, multilingual OCR with strong layout and reading-order detection.
Unlike Marker No hosted API
How it compares
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Surya comes from the same team behind Marker and is built to be both accurate and fast on a GPU.
Pairs with
Commonly used alongside it.
