> ## Documentation Index
> Fetch the complete documentation index at: https://docs.sit.somark.ai/llms.txt
> Use this file to discover all available pages before exploring further.
# SoMark Overview
> Overview of SoMark capabilities and core features
# Welcome to SoMark
SoMark converts PDFs, PPTs, images, and many other document formats into machine-readable structured output with high accuracy, high speed, and strong cost efficiency, providing high-quality data for LLM training and RAG applications.
Industry-leading recognition accuracy with coordinate traceback to pinpoint every element in the source document.
High-speed parsing with horizontally scalable cluster deployment for large-scale batch workloads.
Usage-based billing or one-time licensing. Private deployment starts from a single RTX 3090 GPU.
Detects headings, tables, formulas, images, chemical structures, seals, QR codes, and 14 more element types.
Outputs Markdown, JSON — ready for LLM training pipelines and RAG applications.
Supports research papers, reports, whitepapers, contracts, scanned books, government files, and more.
## Supported file formats
`pdf` `png` `jpg` `jpeg` `bmp` `tiff` `jp2` `dib` `ppm` `pgm` `pbm` `gif` `heic` `heif` `webp` `xpm` `tga` `dds` `xbm` `doc` `docx` `ppt` `pptx` `xlsx` `xlsm` `xls`
## Recognized document elements
SoMark can recognize these 21 document element types:
| Category | Elements |
| ------------------------------ | ------------------------------------------------------------------------------------------------ |
| Text structure | Title `title`, text block `text`, header `header`, footer `footer`, footnote `footnote` |
| Figures and tables | Figure `figure`, figure caption `figure_caption`, table `table`, table caption `table_caption` |
| Specialized content | Equation `equation`, chemical structure `cs`, chemical equation `cs_equation`, code block `code` |
| Navigation and layout | Sidebar `sider`, table of contents `cate`, TOC entry `cate_item` |
| Education and structured items | Choice item `choice`, fill-in-the-blank `blank`, reference `reference` |
| Special elements | QR code `qrcode`, stamp `stamp` |
Title
Text block
Figure
Figure caption
Table
Table caption
Equation
Header
Footer
Sidebar
Footnote
TOC
TOC entry
Choice
Code block
Blank
Reference
QR code
Stamp
Chemical structure
Chemical equation
## Get Started
See the [Quickstart Guide](/en/documentation/get-started-overview) to begin; if you want to inspect API capability and limits first, jump to the [API overview](/en/api-reference/index), and use [FAQs](/en/qa) for common questions.