gtkwave/gtkwave

Health v2 · maintenance only

Adoption not part of the score

1009 stars · 180 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

GTKWave is a GTK-based waveform viewer for Unix, Windows, and macOS that reads FST, LXT, LXT2, VZT, GHW, and Verilog VCD/EVCD dump files. It is primarily used for post-mortem debugging of Verilog and VHDL simulations, with search, filtering, and signal-save features plus helper conversion tools.

Use cases

• view vcd waveform dumps from a verilog simulation
• debug vhdl simulation output with ghw files
• analyze fst waveform files after simulation
• inspect digital and analog signals from a simulation dump
• convert vcd files to fst format
• search signals in a large simulation dumpfile

When to choose

• you need a free, cross-platform waveform viewer for VCD/FST/GHW dumps
• you are debugging Verilog or VHDL simulation results post-mortem
• you want Tcl scripting and helper tools for waveform conversion

When to avoid

• you need real-time waveform viewing during an active simulation
• you need a commercial EDA-grade viewer with advanced verification features
• you only work with proprietary vendor dump formats

Facets

application · maturity active

gui data-visualization developer-tools developer-tools hardware simulation windows cross-platform cpp waveform-viewer vcd fst ghw verilog vhdl simulation-debugging gtk eda debugging linux macos

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markdown · JSON · MCP: product_card(name="gtkwave/gtkwave")