Is MarkItDown Online free to use?

Yes. MarkItDown Online is free to use with an optional Pro plan for advanced features.

What file formats are supported?

MarkItDown Online supports PDF, Word (.docx), Excel (.xlsx), PowerPoint (.pptx), HTML, images (OCR), and audio files.

Is my document data stored?

No. All document processing happens in your browser or via temporary in-memory processing. No uploaded files are stored permanently.

Does MarkItDown Online use Microsoft MarkItDown?

Yes. MarkItDown Online uses the open-source Microsoft MarkItDown library to convert PDF, DOCX, XLSX, PPTX, HTML, images, and audio to Markdown.

Can I convert multiple files at once?

Yes. MarkItDown Online supports batch file conversion. You can upload multiple files and convert them all at once.

MarkItDown Online

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News

How to Prepare PDFs for LLM Context with MarkItDown

2026-07-12

Direct answer: convert the PDF to Markdown first, then chunk. Do not paste raw PDF binary or noisy copy-paste text into an LLM prompt.

Steps

1) Upload the PDF to MarkItDown Online. 2) Download Markdown. 3) Split by headings. 4) Send only relevant chunks to the model. Typical conversions often finish in about 2-5 seconds for common documents.

Why Markdown first

Markdown preserves heading hierarchy better than OCR-dump text, which improves citation and retrieval quality.