Flow CSV Editor is a lightweight, high-performance native desktop application designed specifically for viewing, plotting, and editing large time-series and numeric CSV datasets on Windows. Originally built with signal processing engineers in mind, it handles massive data files (such as sensor data, measurement logs, and machine learning datasets) that usually crash or slow down traditional spreadsheet software.
The software operates entirely locally on your device using optimized caching and indexing algorithms to ensure instantaneous file loading and lag-free editing without uploading your data to the cloud. Core Visualization and Analytics
Line Plot Visualization: Converts rows into samples distributed across the X-axis and transforms columns into data variables plotted as lines.
Linear Time Scaling: Features an X-axis that automatically scales linearly with monotonically increasing numeric columns, allowing for accurate time-series evaluation.
Fluid Plot Control: Allows you to zoom horizontally and vertically with mouse scroll wheels, pan by dragging across charts, and instantly select peaks or specific ranges.
Customizable Graph Layouts: Organizes variables into independent “cells” that can be reordered, resized, or grouped to share the same chart grid. Settings can be saved to custom layouts per file.
Instant Statistics: Selecting a variable or a specific highlighted plot range displays real-time summary statistics, including sample count, min/max values, total sum, average, and standard deviation. Advanced Editing Capabilities
Cell and Range Modifications: Edit values directly by double-clicking or hitting F2. You can overwrite single entries or seamlessly update a selected range of data points at once.
Expression and Formula Engine: Supports advanced formula parsing, string indexing/slicing, and hexadecimal conversion. You can dynamically redefine data columns with an expression or convert formula variables into fixed numeric values to preserve them upon saving.
Data Cleansing and Sorting: Provides robust tools to sort datasets in ascending/descending order. It lets you target and delete entries by custom-typed search conditions or completely prune variables from the index.
Timeline Structural Operations: Offers native cut, copy, and paste capabilities across sample timelines. It supports toggleable overwriting or structural clip insertion, letting you easily patch telemetry data gap-by-gap.
Undo/Redo System: Includes standard multiple-step undo and redo capabilities to safeguard data editing. Platform Availablity
Flow CSV Editor is available as a paid app on the Microsoft Store for Flow CSV Editor. The developer, Waveworks, also offers a completely free variant called Flow CSV Viewer. The free version contains the identical ultra-fast plotting, visual layouts, and statistical tools, but lacks data-saving and active editing functionalities.
Are you hoping to use Flow CSV Editor to work with sensor telemetry, machine learning datasets, or engineering logs? If you share the size or format of your files, I can help you confirm if it fits your specific data needs. Flow CSV Viewer – Free download and install on Windows
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