Squiggly – The Open Source EEG Visualizer
A rapid, transparent, open-source analytics tool of EEG recordings
Open Source, Free Tool to Visualize Your EEG
Explore a wide range of features to help you visualize and analyze your EEG recordings.
01
Upload EEG
Upload your EEG files to perform secure, online analysis for free. Supports .EDF, .CSV, and .JSON formats
02
Visualizer
Visualization for raw EEG files to provide ability for you to quickly inspect EEG files
03
Quantitative Analysis
Provides amplitude, symmetry, coherence, LZC, and known risk assessments based on EEG
Join the cause
Keep EEG Visualization & Analysis Open
Passionate about EEG? Have skills? You should consider contributing to keep EEG Visualization and Analysis open and free. Because in a world filled with secrets, transparency and openness matter.
About Squiggly
Alex started developing Squiggly in Nov, 2025 as he was disappointed by the fact that there is no free, open source EEG visualizer and analyzer that is available to be run on the cloud. There are some very good desktop based EEG visualizers, both paid and free. But the need for an easy-to-use, barrier free online tool that can be accessed anywhere to visualize your EEG files prompted him to take action.
100%
Free to use.
100%
Open source.
5 modes
Basic analysis
Transparency
All design and code public