datalab-to/chandra
OCR model that handles complex tables, forms, handwriting with full layout. observed · 2026-08-28
Health v2 · maintenance only
71/100
- Activity 89
- Release rhythm 75
- Longevity 23
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-03. Adoption (stars, forks) is never an input.
- gap_med: 0
- age_days: 329
- days_rel: 168
- days_push: 68
- n_releases_24m: 8
Adoption not part of the score
12171 stars · 1236 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded
Chandra OCR 2 is a state-of-the-art open-weight OCR model from Datalab that converts images and PDFs into structured HTML, Markdown, or JSON while preserving full layout information. It supports 90+ languages and excels at complex tables, forms, math, and handwriting, with local (HuggingFace) and remote (vLLM server) inference modes.
Use cases
- convert scanned pdfs to markdown
- extract tables from document images
- transcribe handwritten notes
- digitize forms with checkboxes
- ocr documents in multiple languages
- convert documents to structured with layout
- extract math equations from images
When to choose
- you need layout-aware OCR output in HTML/Markdown/JSON
- documents contain complex tables, forms, math, or handwriting
- you need multilingual OCR across 90+ languages
- you want to self-host an open-weight OCR model with vLLM
When to avoid
- you need only plain text extraction from simple documents
- commercial self-hosting without licensing arrangements
- you lack GPU resources for local inference and don't want a remote API
Facets
library · maturity active
ocr machine-learning pdf nlp artificial-intelligence computer-vision pdf python cli document-intelligence layout-preservation handwriting-recognition table-extraction multilingual vllm markdown-conversion natural-language-processing gpu docker
2 sources
- readme: https://github.com/datalab-to/chandra · fetched 2026-08-28 · db05f20a2067
- homepage: https://www.datalab.to · fetched 2026-08-29 · 2bbd3c9c83e2
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| datalab-to/chandra | main | 71 |
For agents
markdown · JSON · MCP: product_card(name="datalab-to/chandra")
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem