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Flash PDF to Markdown

API to convert documents to readable, compact and easy-to-read Markdown by AI agents.

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What converts

  • DOCX
  • CSV
  • TXT
  • XLSX
  • PPTX
  • ZIP with a supported document inside

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Typical use cases

  • Agents who read contracts or reports: a legal or financial assistant who needs the content of a PDF in the context of the prompt, without spending tokens on formatting noise.
  • Pipelines RAG: Index large documents by converting them to clean Markdown before chunking and embedding.
  • Backoffice automation: convert invoices, shipments or exports XLSX/CSV to structured text so that a LLM extracts fields.
  • Document preview: display the content of a PDF in a UI without the need for a heavy viewer.
  • Documentation migration: move manuals or wikis in DOCX to Markdown for a Markdown-based content management system.
For very large PDFs where you are only interested in one section, first use POST /pdf/index to get the document map and then request only the relevant page range — avoid paying the full conversion and token cost.

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Three ways to send documents

POST /convert

Subida multipart/form-data.

POST /convert/raw

Raw binary, with optional gzip/zstd.

POST /convert/from-url

From a signed URL.
For large documents, from-url is usually better: it prevents your server from receiving and forwarding the same file. POST /convert/raw has a separate body limit (12 MB by default) precisely because the binary travels the entire network before starting to convert; from-url does not have that limit and goes up to the processing limit (500 MB by default). See Weights and limits.

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Why Markdown

  • Headings (#, ##, ###) give the model an explicit hierarchy of the document, instead of having to infer it from line breaks or capital letters.
  • Tables are normalized to Markdown syntax, so the model does not have to reconstruct columns from loose spaces.
  • The default clean=true removes repeated headers and footers on each sheet, which would otherwise be repeated hundreds of times in a long document and waste context.

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Quick FAQ

  • Do I need to pre-process PDF? No. Send it as is: PDF native or scanned, with or without text layer.
  • Can I use it for production? Yes, it is intended for real agent traffic, not just demos. See Security and Weights and limits.

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Siguiente paso

Quickstart

Your first conversion in less than a minute.