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Text annotator
Classification, span labeling, and preference ranking in one editor.
Custom label schemas with hotkeys, hierarchical taxonomies, and per-span notes. The same editor handles NER, document classification, and RLHF preference ranking, no separate tool for each task type.
Span, document, and preference tasks, one schema builder
Define a label set once, hierarchical, hotkey-bound, with per-label instructions, and use it across NER, classification, and RLHF ranking tasks in the same project.
- → Overlapping and nested spans, with conflict resolution on export
- → Hierarchical label trees with collapsible hotkey palettes
- → Per-span free-text notes and confidence tagging
- → Same editor surfaces RLHF pairwise ranking, no context switch
Document
The patient was prescribed
amoxicillin
500mg for a suspected
streptococcal infection,
to begin
Monday.
DRUG
CONDITION
DOSE
DATE
Hotkeys
1 DRUG
2 CONDITION
3 DOSE
4 DATE
Built for high-throughput text work
Keyboard-first editing
Every label and action is hotkey-bound. Fast annotators never touch a mouse.
Schema versioning
Change a label taxonomy mid-project without breaking already-annotated items; re-run trial tasks against the new schema first.
Structured export
Spans, document labels, and preference rankings export to JSONL or CoNLL, ready for your training pipeline.