Try it out at universaldatatool.com or download it here.

The Universal Data Tool is a web/desktop app for editing and annotating images, text, audio, documents and to view and edit any data defined in the extensible the .udt.json and .udt.csv standard.


  • Usable on web or as desktop application
  • Collaborate with others in real time
  • Configure your project with an easy-to-use GUI
  • Scales to tens of thousands of data points per dataset
  • Download/upload as easy-to-use CSV or JSON
  • Support for Images, PDFs, Text, Audio Transcription and many other formats
  • Can be easily integrated into a React application
  • Annotate images with classifications, tags, bounding boxes, polygons and points
  • Annotate NLP datasets with Named Entity Recognition (NER), classification and Part of Speech (PoS) tagging.

Universal Data Tool Computer Vision Cat

Audio Transcription

Download Formats

Data Entry

Named Entity Recognition

Collaboration Screenshot

Collaboration Demo


wao.ai sponsorship image


  • Correctness of implementation of the .udt.json standard.
  • Implement entirety of the .udt.json and .udt.csv standards
  • Rely on external libraries which specialize in each type of annotation to enable the best tools to be used
  • Easy to use
  • Easy to integrate


The Universal Data Tool is always looking for the best libraries to provide the
user interface for different types of annotation. Currently, the following
libraries are used…

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