Specctra DSN/SES lets you use a powerful external autorouter like Freerouting to route your board.
- Export DSN — Click Export DSN to save your board as a Specctra Design file.
- Open in Freerouting — Launch Freerouting and open the
.dsn file.
- Route — Click the Autorouter button in Freerouting and wait for it to finish.
- Export Session — In Freerouting, go to File → Export Specctra Session File to save a
.ses file.
- Import SES — Back in ClearPCB, click Import SES and select the
.ses file. Traces and vias will appear on your board.
💡 Freerouting often produces higher-quality results than the built-in router for complex boards.