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It doesn't have to be difficult.

Flow is a suite of light-weight tools for viewing and editing data files in CSV format. It's designed to be extremely quick and easy to use. It opens any valid CSV file immediately without any dialogs or complicated commands, and you'll be viewing, analyzing and editing the data of interest within seconds.

Flow was originally written with the signal processing engineer in mind. It's optimized for measurement and sensor data files, but it's also useful for viewing and editing large machine learning data sets as well as for other applications where numeric data is involved. The data is plotted as line charts, and zooming, scrolling and rearranging the plots is fast and efficient, also on large data sets.

Each column of the CSV file is interpreted as a variable, and the variables are listed in the left part of the screen. Moreover, each row is interpreted as a sample, and the samples are represented on the x axis of the chart area in the right part of the screen. New variables can be added by writing formulas over the existing variables.

Feature Matrix

FeatureFlow CSV ViewerFlow CSV Editor
Open any valid CSV file
Line chart display
Arrange line charts into cells
Print chart and copy chart as image
Simple text search
Advanced boolean expression search
Formula engine based on Python syntax
Edit values
Cut, copy and paste samples
Remove, reorder and rename variables
Unlimited undo and redo

About Me

My name is Gustaf Hammarberg and I'm a professional software developer and engineer, specializing in signal processing and machine learning. Because I find that software tools for engineering are consistently difficult to use or ridiculously expensive, often both, I often end up writing my own tools. With Flow, I wish to share one of these tools with others with the same experience. It has been three years in the making, and I've spent considerable time eliminating bugs and ensuring it's easy and quick to use.

If you use the free edition Flow CSV Viewer, please consider buying Flow CSV Editor at Windows Store. It's only 5 euros. That way, you support continued development, and improvements will come back to you faster.