STL Error Checker, free in your browser
The second free Meshworthy web tool ships: a read-only STL Error Checker that runs entirely in the browser with no model upload. It reads the mesh topology and separates print-blocking problems from advisory ones, using the same severity model as the Meshworthy Mac app, and shows an interactive 3D overlay that matches the native viewport.
STL Error Checker
- Reads binary and ASCII STL by proving the structure, never trusting the extension, then recovers topology with a deterministic vertex weld.
- Blocking checks: open boundary edges, non-manifold edges, orientation, and inward-facing closed shells. Advisory checks: degenerate faces, duplicate faces, self-intersections, contact risks, and isolated debris candidates.
- Interactive viewport with a reference grid, grounded contact shadow, and per-issue overlays you can isolate and frame, plus a copyable local report and a shell table.
- Eight benchmark fixtures with a documented, committed expected result let anyone see a known defect reported without a file of their own.
Privacy and safety
- All parsing and analysis run in a Web Worker; no model, filename, or coordinate leaves the device.
- Rejects corrupt triangle counts, non-finite coordinates, truncated data, and oversized meshes with named error codes before any analysis.
- Verified by an expanded unit suite and a 5-browser end-to-end suite, including a no-request-body privacy check and accessibility checks.