Engineering Tools
Free tools built for engineers and buyers — no signup required. Visualise tolerances, compare materials, estimate costs, and convert units right in your browser.
3D Model Viewer
Upload and inspect STL files directly in your browser. Rotate, zoom, and measure bounding dimensions before sending for quote.
Material Comparison
Compare up to 3 materials side-by-side — tensile strength, density, hardness, max temperature, and machinability at a glance.
Quote Estimator
Get an instant price range estimate for your CNC part. Input material, dimensions, tolerance, finish, and quantity — get a ballpark in seconds.
Tolerance Visualizer
See what ±0.01 mm actually looks like. Interactive SVG diagram with ISO tolerance grades, human-scale comparisons, and application guidance.
Surface Finish Guide
Ra values, N-grades, typical processes, and relative cost — everything you need to specify surface finish on your engineering drawing.
Unit Converter
Convert between engineering units — length, pressure, force, density, and temperature. Instant conversion with common reference values.
All tools run in your browser
No data is sent to our servers. All calculations and file processing happen locally. Your STL files never leave your device.