Tech that feels instant

SoupBrain builds clean, modern automation and AI tools that remove busywork and keep things simple. Our flagship is SplineGen, spline and gear design software that runs in your browser.

Try SplineGen free → Meet SplineGen

Our flagship product

Meet SplineGen

Every spline standard. One browser tab.

SplineGen is online spline and gear design software for mechanical engineers, machinists and inspectors. ANSI B92.1, ISO 4156, DIN 5480, SAE J500, JIS and more — 20+ standards across involute, serration, polygon and hexalobular profiles. No install, no seat licence.

Try SplineGen free → See what it does

01Design

From the standard — or straight off the print.

Start from a standard, a shape family, a one-line callout or the customer's drawing. The numbers come from the spec, not from you.

Standards

Pick the standard. Get the numbers.

Major, minor and pitch diameters, tooth thickness and pressure angle come straight from the standard — before you draw a single line.

New Shape

Start from a shape — or from the print.

Choose from eleven tooth and profile families, or drop in a DXF, STEP, PDF or image. SplineGen reads the data block, measures the outline and matches it to a standard.

Callout

Say the whole part in one line.

“B92.1 EXT 20T 2.5/5 30° FLAT CL5” — type the callout straight off the print and get the part. Every term becomes a chip you can change on its own.

Axial View

Drag on a groove. Done.

Lead-ins, lead-outs, relief grooves, shoulders and helix go on the side view by drag and drop, fully dimensioned and carried into every export.

Drive Profiles

Torx-style drives, T4 to T30, from one slider.

Hexalobular bits and sockets, polygons, hex and square drives sit alongside splines and gears — standard dimensions, plain or tamper-resistant.

02Assemble & analyze

Know it meshes. Know it holds.

Build gear trains, check them in 3D and run the analysis in the same tab you designed them in.

Assemble

A meshed gear train in one click.

Planetary, compound, idler and series trains — built from a ready-made recipe or your own parts, placed at the right centre distance and phased so the teeth actually mesh.

3D

See the whole assembly in 3D.

Every part you design is a solid. Orbit the full train, check the fit by eye, then send it out as STEP, STL or 3MF.

Analyze

FEA built in. Not bolted on.

See stress contours across every flank and root fillet while you design — no export, no separate solver, no waiting.

Analyze

Know it holds before you cut it.

Power flow, mesh forces and capacity used for every part in the train — with one clear verdict when everything clears.

Fit Analysis

Will it go together? Know before you cut.

Clearance, engagement and backlash across the full tolerance stack — every band graded clears, tight or interferes, with the numbers behind it.

Contact Analysis

See which tooth takes the load.

Loaded tooth contact analysis with pitch error and misalignment shows how torque really spreads across the teeth, and hands you a k_load you can design with.

Materials

133 alloys. Properties included.

Steels, stainless, tool steels, aluminum, titanium, nickel superalloys and plastics, each with strength, stiffness, hardness and machinability that feed straight into the analysis.

03Manufacture & inspect

Ready for the shop floor.

See how the part gets made, hand the inspector every limit, and export whatever the next person needs.

Manufacture

The cutter, drawn to scale.

Hobbing, broaching, shaping, grinding and EDM: see the tool against the tooth, get flagged wherever the process can't make the form, and read off measurement over pins.

Manufacture

Broach rises, worked out for you.

Pick linear broaching and see the tooth rises, chip load per tooth and pre-turn diameter, with every rise drawn on the part.

Inspection

Every limit your inspector asks for.

Min and max major and minor, space width, effective and actual tooth thickness, measurement over pins — computed from the standard and ready to copy, email or export.

Export

From screen to shop floor.

STEP, DXF 2013/2018, STL, 3MF, SVG, PDF drawings, CSV and a multi-page compliance report — for a single part or the whole assembly at once.

04Work fast

Out of your way.

A command palette, built-in guides and short lessons, so nobody has to sit through a training course.

Speed

Find anything. Just type.

Press ⌘K and type “DIN 5480”, “hex socket” or “export STEP”. Every standard, command and help article is a few keystrokes away.

Getting Started

Productive in minutes, not weeks.

Short interactive lessons walk you around the app on a live model — no training course, no manual, no install.

Built-In Guides

A guide for every standard, beside the drawing.

Pitches, fit classes and the shorthand on the print — explained in plain language, without leaving the part you're working on.

Standards supported

  • ANSI B92.1
  • ANSI B92.2M
  • ISO 4156
  • DIN 5480
  • DIN 5481
  • DIN 5482
  • SAE J500
  • JIS B 1601
  • JIS B 1602
  • JIS B 1603
  • ISO 14
  • ISO 10664
  • ASTM F116
  • DIN 32711
  • DIN 32712
  • Generic serration

Your next spline is one browser tab away.

No install, no seat licence. Open SplineGen and design your first part in minutes.

Open SplineGen →

SplineGen questions

What is SplineGen?

SplineGen is spline and gear design software that runs in your web browser. You design a spline, serration, polygon, hexalobular drive or gear to a published standard, check it with built-in FEA, fit and contact analysis, and export production-ready STEP, DXF and PDF drawings. It is made by SoupBrain.

Which spline standards does SplineGen support?

ANSI B92.1, ANSI B92.2M, ISO 4156, DIN 5480, DIN 5481, DIN 5482, SAE J500, JIS B 1601, JIS B 1602, JIS B 1603, ISO 14, ISO 10664, ASTM F116, DIN 32711, DIN 32712 and generic serrations — more than 20 standards across involute, serration, polygon and hexalobular profiles.

Do I need to install anything?

No. SplineGen runs entirely in the browser at splinegen.com — no download, no install and no seat licence to manage.

Can SplineGen read a customer drawing?

Yes. Drop in a DXF, STEP, PDF or image and SplineGen reads the data block, measures the outline and matches it to a standard. You can also type the callout straight off the print, such as “B92.1 EXT 20T 2.5/5 30° FLAT CL5”.

Can it design gears and gear trains?

Yes. Build planetary, compound, idler and series gear trains from a ready-made recipe or your own parts. SplineGen places them at the right centre distance, phases the teeth so they mesh, and shows the whole assembly in 3D.

What file formats can I export?

STEP, DXF 2013 and 2018, STL, 3MF, SVG, PDF drawings, CSV and a multi-page compliance report — for a single part or a whole assembly at once.