📊 Free Tool

CSV to Spectrum Converter — Upload & Analyze Frequency Content

Upload a CSV file or paste data directly, compute the FFT, and visualize the time-domain signal, magnitude spectrum, and phase spectrum — entirely in your browser. No uploads to any server, no sign-up.

1. Load Data

📁

Drag & drop a CSV file here

or click to browse — single column (values) or two columns (time, value)

Or paste CSV data manually

Or load a demo dataset:

2. Settings

Sample Rate (Hz)

Window Function

Magnitude Scale

Show Phase Spectrum

CSV to Spectrum Converter — Upload & Analyze Frequency Content

1. Load Data

2. Settings

Detected Peak Frequencies

Time-Domain Signal

Magnitude Spectrum

Phase Spectrum