Best Web-based Annotation Tool
That is Entirely FREE!

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- Advanced labeling tools
- Traceable history
- Feedback capabilities
- Internal QA

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Annotation Options

Choose the most suitable tool for your project

We designed our tool to function seamlessly with the least number of clicks to speed things up.

Enable user-defined rules for annotations

Want to specify or add some validation rules on/to your labeled data? Just place an attribute on them.

Attributes, allows users to specify validation rules and request more detailed information

Internal feedback

If you need to communicate with
your team and point a mistake out,
we have implemented internal
flags with a comment option.

You can also draw on images to specify an issue

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annotation tool online

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