Gerber Viewer

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If you work with PCB manufacturing files, try our free online Gerber viewer. It displays Gerber (RS‑274X), Excellon (v1 and v2) and ZIP archives directly in your browser. Our implementation supports 100 % of the Gerber and Excellon specifications, making it the most comprehensive free viewer.

  • View Gerber (RS-274X) and Excellon files directly from your HTML5‑powered browser.
  • Run the viewer entirely on your computer with no external server interaction, keeping your sensitive files private.
  • Render 100 % of the Gerber (RS‑274X) and Excellon specifications. We challenge you to find another Gerber viewer that can render this Excellon specification test file correctly.
  • Render layers with transparency, making overlay comparisons easy.
  • Pre‑renders all files, delivering a snappy interface while panning and zooming.
Multi-layer Gerber file in viewer

Our online Gerber viewer was created to give everyone an easy, accurate reference for Gerber and Excellon files. If you encounter a tricky Gerber or Excellon file that does not display correctly, please let us know.

The core parsing and rendering of this viewer is based on the open‑source gerbv logic. For the Gerber (RS‑274X) specification, the latest version can be downloaded from the Ucamco website. The official Excellon format description is also available (archived from the original on 2007‑10‑30).

Full transparency viewing

Sample Gerber file viewer

Quickly view multi‑layer Gerber layouts online with full transparency. Individual layer colors and opacities can all be modified on‑the‑fly.

100% Gerber and Excellon support

Excellon test file rendering

Quickly view multi‑layer PCBs with full transparency. With complete Gerber and Excellon support, you can verify designs in the online viewer before manufacturing. Open ZIP files containing both Gerber and drill layers, enabling engineers to share multi‑layer PCBs directly in the viewer.