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tsmap

A desktop and browser application for loading and visualising semiconductor wafer map data. Open STDF, ATDF, CSV, and JSON lot files and get interactive yield maps, parametric heat maps, bin pareto charts, per-test boxplots and histograms, and a cross-test correlation matrix — all without uploading your data anywhere. Wafer rendering and analysis are built on wafermap, our own purpose-built wafer-map engine.

Why tsmap

  • Fast. The parser is native Rust on both platforms — a 341 MB / 266,000-die STDF lot parses in about 3.5 seconds (~96 MB/s) on a 2021 ThinkPad laptop, or about 2.3 seconds (~148 MB/s) on a small desktop.
  • One engine, two platforms. The desktop app and the browser build share the same Rust parsing core (compiled to WebAssembly for the browser) and the same rendering — what you see in one, you see in the other.
  • Nothing leaves your machine. Parsing happens entirely locally, on both desktop and browser. There is no upload step.
  • Lean. Seven runtime dependencies, total. No bundled UI framework, no third-party charting library.

Try it in the browser

Open tsmap →

No install required. Files are parsed locally in your browser using a WebAssembly build of the same Rust parser used in the desktop app. Nothing is uploaded.

No wafer files of your own? Download a sample lot and open it straight away.

Download the desktop app

The desktop version adds native file dialogs, drag-and-drop from the OS, and works offline without a browser. Builds for Linux, macOS, and Windows are attached to each GitHub release.

See it in action

See the full Features tour, or read through a few Use cases.

Supported formats

Format Notes
STDF (.stdf, .std) Binary V4 — multi-wafer lots, PTR and FTR tests; test selector always shown
ATDF (.atdf, .atd) ASCII equivalent of STDF
CSV (.csv, .txt, .dat) Column mapping step; wide and long (pivot) formats
JSON (.json) Flat array or nested [{ wafer, results: [{die}] }]
Gzip (.gz) Transparent decompression — e.g. lot.stdf.gz
Zip (.zip) All contained files extracted and loaded as a batch

Community

Questions, ideas, or want to show off a wafer map you built? Use GitHub Discussions.