nlplab/brat
brat rapid annotation tool (brat) - for all your textual annotation needs observed · 2026-08-28
Health v2 · maintenance only
32/100
- Activity 0
- Release rhythm 35
- Longevity 100
Flags: no_releases no_license
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: n/a
- age_days: 5696
- days_rel: n/a
- days_push: 791
- n_releases_24m: 0
Adoption not part of the score
1879 stars · 514 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded
brat is a web-based collaborative text annotation tool for creating text-bound and relational annotations, originally built for NLP and BioNLP research. It runs as a Python server with a browser-based client offering intuitive mouse-driven annotation editing and visualization.
Use cases
- annotate text spans and relations for NLP datasets
- collaboratively label documents with a team of annotators
- visualize entity and relation annotations over raw text
- create training data for named entity recognition
- link annotations to external ontologies and databases
- annotate biomedical text for research projects
When to choose
- you need a free, self-hosted, browser-based annotation tool with zero setup for annotators
- your team is doing NLP or biomedical text annotation with spans and relations
- you want centralized data and configuration management for annotation projects
When to avoid
- you need modern actively developed tooling or a maintained Python 3 stack
- you need annotation types beyond text-bound and relational annotations
- you want a SaaS solution without server maintenance
Facets
application · maturity maintenance
nlp web-framework gui data-science artificial-intelligence web-development self-hosted python browser self-hosted text-annotation annotation-tool collaborative-annotation nlp-annotation corpus-annotation visualization natural-language-processing web-server linux
5 sources
- readme: https://github.com/nlplab/brat · fetched 2026-08-28 · 8fb2847f9bc2
- homepage: http://brat.nlplab.org · fetched 2026-08-29 · cc5d7af199a7
- site_page: http://brat.nlplab.org/about.html · fetched 2026-08-29 · 418064ac762f
- site_page: http://brat.nlplab.org/features.html · fetched 2026-08-29 · a91abec5726a
- site_page: http://brat.nlplab.org/installation.html · fetched 2026-08-29 · acf9ee4a53c9
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| nlplab/brat | main | 32 |
For agents
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem