Research · Vendor site 2026-10-04
brat is a browser-based rapid annotation tool for collaborative text annotation in NLP and digital humanities projects. It runs in supported browsers without installation, offers intuitive visualization and editing, and can be downloaded for local deployments with documented upgrade paths.
Annotation teams, linguists, and NLP researchers who need a lightweight collaborative text tagging environment.
The homepage warns that editing features require a fully supported browser and that unsupported browsers cannot run brat.
brat presents itself as a browser environment for collaborative text annotation with visualization, editing, downloads, and installation instructions for local servers.
What it can do
Unknown is different from unavailable. Each fact carries its own evidence.
| Capability | Value | Evidence | Checked |
|---|---|---|---|
| Browser-based | Homepage states brat runs in the browser with no installation required for the online demo. | Facts sourced | 2026-10-04 |
| Collaboration | Site describes an online environment for collaborative text annotation. | Facts sourced | 2026-10-04 |
| Version | Current release listed as v1.3 Crunchy Frog (2012-11-08). | Facts sourced | 2026-10-04 |
Understand the total cost
Free
Free
brat is open source under the MIT License with free download of version 1.3 and public demo credentials on the project site.
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Explore toolThe practical questions
brat is a browser-based rapid annotation tool for collaborative text annotation in NLP and digital humanities projects. It runs in supported browsers without installation, offers intuitive visualization and editing, and can be downloaded for local deployments with documented upgrade paths.
brat is open source under the MIT License with free download of version 1.3 and public demo credentials on the project site.. This record lists ongoing free access; check the plan limits before starting.
No paid monthly price is listed; this record treats the product as free to start. See the plan cards for entitlements, billing commitments and seat minimums.
Not confirmed on the public homepage; brat focuses on interactive browser annotation rather than a documented public API.. API access and subscription access may have different terms; consult the linked sources.
The homepage warns that editing features require a fully supported browser and that unsupported browsers cannot run brat.
No retained pricing changes yet. A current price alone does not establish a historical trend.
Reviewed vendor source
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