poplar

Why we included this project

Poplar is a browser-based tool for labeling spans, entities, and relations in raw text, aimed at named-entity recognition and similar sequence-annotation work. It is inspired by the classic brat annotation tool, but ships as a Vue/TypeScript component you install with npm and embed into your own pages, so there is no separate hosted labeling service to stand up. That makes it appealing if you already run your own annotation pipeline and want a small widget you can drop into a custom admin page and feed JSON or plain strings. The project dates back to 2016 and is no longer actively developed, so expect to maintain it yourself; for straightforward span-based labeling it is a compact, pragmatic choice rather than a flashy new tool.