GazePlotter

Browser-based, open-source tool for interactive AOI-based visualization and analysis of eye-tracking data. No installation, no registration, no data uploaded to a server — all processing runs entirely client-side.

Please cite the GazePlotter paper (BibTeX) if you use the tool in research.

• GazePlotter app — use it now in your browser
• Documentation — guides for upload, plotting, and export
• npm package — embed in your Svelte project

Features

• Scarf plots (sequence charts) rendering fixations, saccades, and AOI-coded segments across multiple participants and stimuli, with absolute, relative, and ordinal timeline modes
• AOI transition matrices showing gaze transition probabilities between areas of interest
• Bar plots of AOI-based metrics — dwell time, fixation count, visit count, time to first fixation, first fixation duration, hit ratio, and more
• Time-binned AOI occupancy charts for temporal distribution of gaze across areas of interest
• Dynamic AOI visibility layers to handle time-varying areas of interest
• Drag-and-drop dashboard with resizable, repositionable plot panels
• Client-side processing — all data stays in the browser; nothing is uploaded to a server
• CSV export of computed eye-tracking metrics for further statistical analysis
• PNG / JPG export of all visualizations

Supported eye-tracking software

GazePlotter parses raw data exports from the following eye-tracking platforms:

Use as Svelte component

npm install gazeplotter

<script>
  import { GazePlotter } from 'gazeplotter'
</script>

<GazePlotter />

Requires Svelte 5.

Developing

npm install
npm run dev

Everything inside src/lib is the published GazePlotter library; src/routes is the web app and documentation site deployed at gazeplotter.com.

Build

npm run package    # build the library
npm run build      # build the web app

Test

npm run test

Citation

Vojtechovska, M. & Popelka, S. (2026). GazePlotter: An open-source solution for the automatic generation of scarf plots from eye-tracking data. Behavior Research Methods, 58(3), 85. doi: 10.3758/s13428-026-02959-5

BibTeX

@article{vojtechovska2026gazeplotter,
    author    = {Vojtechovska, Michaela and Popelka, Stanislav},
    title     = {{GazePlotter}: An open-source solution for the automatic generation of scarf plots from eye-tracking data},
    journal   = {Behavior Research Methods},
    volume    = {58},
    number    = {3},
    pages     = {85},
    year      = {2026},
    doi       = {10.3758/s13428-026-02959-5}
}