Check a geotechnical calculation fast,
right in your browser
A real FEM model — Hardening Soil, active/passive pressures, sheet piles — for the engineer who wants a quick sanity check, not a full project with thousands of dollars in licenses. Validated against 391 automated checks.
An account that's yours, a solver that's real
It's yours, not your employer's
Firms carry different licenses — one has Robot, another Advance Design, another some geotechnical package. When you change employers, your skills stay, but the access disappears. With a personal JointLib account, you keep the same tools no matter where you work — you don't depend on what your current employer bought.
A real FEM solver, not just a checklist of code clauses
Most Eurocode AI assistants check formulas and compliance. JointLib runs an actual finite-element solver — Hardening Soil model, nonlinear soil behavior — not just closed-form calculations from a lookup table.
Right in your browser, nothing to install
No machine license, no hardware dongle, no company VPN. Open the page, enter your data, get your result.
Validated, not just "probably correct"
391 checks compared against independent reference solutions, 74 of them against published sources. See the comparisons below — not just a promise.
We publish what works — and what doesn't
391 automated checks run on every change to the solver. 74 of them compare directly against published sources — the official constitutive-model manual, technical papers, and a real laboratory test (Hostun sand, tested at the University of Grenoble).
Maximum horizontal ground displacement behind the wall
Same site geometry, two soil modelsThe difference between "approximately right" and "right".
We also publish what doesn't work — a solver that only shows successes isn't credible to a skeptical engineer; one that publishes its own limits is.
See all 391 checks →Frequently asked questions
Do I need a powerful computer or installed software?
No — it runs in the browser, on any laptop. No license, no hardware dongle, no install.
What happens to my account if I change employers?
Nothing — the account is yours, not the firm's. You keep access to exactly the same tools, wherever you work.
How accurate is the solver?
391 automated checks run on every change, 74 compared directly against published sources — constitutive-model manuals, technical papers, a real laboratory test. We publish what doesn't work too, not just the successes. See all 391 checks →
Which soil models does it cover?
Mohr-Coulomb, Hardening Soil, HS-small, Soft Soil Creep, Modified Cam-Clay — the same advanced constitutive models used in major geotechnical software.
Can I cancel anytime?
Yes, monthly subscription, no commitment — cancel from your account anytime.
Are my projects private?
Yes, private by default. You can choose to take screenshots and show off a project publicly, but that's a manual action on your part, not default visibility.
Ready to check your first calculation?
No commitment, cancel anytime. Full access to the geotechnical solver — advanced soil models, instant verification, calculation report.
3 free calculations, no card required, then $9/month