WaveDrom — The Complete Guide: Free Timing Diagrams and Register Maps From Text

WaveDrom is a tool that draws timing diagrams (waveforms) of digital signals from a short text description in a JSON-like format. You write the clock, data and signal sequences and get a clean diagram to export into specifications, datasheets and presentations.

WaveDrom

WaveDrom (Aliaksei Chapyzhenka)

Draws digital timing diagrams and register maps from a simple text description — in the browser or as a desktop app.

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What you get

Timing diagrams — clocks, data buses and control signals.
Register maps — bit fields laid out clearly.
Text description — easy to update and keep under version control.
Online editor — work directly on the website.
Desktop app — for Windows, macOS and Linux.

What it is not

WaveDrom is not a simulator — it only draws what you describe. For real waveforms from a simulation you need a waveform viewer, and for signals from a real circuit you need a logic analyser. It is licensed under MIT, commercial use included.

Related tools

For viewing Verilog and VHDL simulation results — GTKWave. For capturing signals from a real circuit — PulseView. For flow and state diagrams from text — Mermaid.