Custom insoles for Achilles tendonitis.
Heel support, shaped to you.
Ergono3D lets you design insoles with the heel cradle, cushioning, and firmness you want, then export a print-ready STL built from your own foot profile. Many people with Achilles tendonitis look for a supportive, cushioned heel. It is a design tool, not a medical treatment — see a clinician for persistent pain.
Shape your heel support without CAD.
Instead of pushing vertices around in CAD, you answer a guided survey and adjust the support that shapes the final insole — the heel cradle, the cushioning, and the firmness. That keeps it easy to refine after you've actually worn them.
A supportive, cushioned heel — built for your foot.
Achilles tendonitis is irritation of the Achilles tendon at the back of the heel, and it is one of the more common causes of heel discomfort (Mayo Clinic, AAOS OrthoInfo). A store-bought insole gives every heel the same cradle and the same cushioning. When you set the heel cradle and the cushioning under the back of the heel yourself, the result is fitted to your own foot — and it's a file you can adjust, not a pair you replace.
A fixed insole puts the same cradle and the same padding under every heel — it can't deepen the cradle or add cushioning at the back of the heel where you want it.
Set how deep the heel cradle sits and how much cushioning backs the heel from a guided survey, then export an STL tuned to your foot.
Off-the-shelf means buying a whole new product each time the heel feels too firm, too flat, or not cushioned enough.
Dial the heel cradle or cushioning up or down and export the next version — print at home or via a service.
The right heel is personal.
There is no universal heel cradle. How deep the cradle sits and how much cushioning backs the heel that feels best is individual; many people find a supportive, cushioned heel more comfortable for standing and walking, but it varies and an insole is not a cure. This isn't medical advice — see a podiatrist or clinician for foot pain, especially pain that persists.
From your foot to a wearable insole.
Ergono3D keeps it practical: design the file, print it in TPU, wear it, and tune the next version without rebuilding anything by hand.
Heel cushioning
Set the heel cradle and cushioning to match you, not a shelf size.
Softer or firmer
Choose the firmness and cushioning, then re-export to fine-tune after you've worn them.
Adjust and re-print
Wear it, learn from it, export the next version — it's a file you keep, not a final purchase.
Home or service
Print in TPU at home for a few dollars of filament, or send the STL to a print service.
Guided, not modeled
Answer a survey and tune controls — no scanner, no manual modeling step.
Print your heel-support design into a wearable insole.
Print the generated file, wear it in your everyday shoe, then refine the heel support and firmness from how it actually feels.
Which TPU firmness for your insole.
Every design exports as TPU-ready geometry, but the firmness you print in changes how it feels underfoot. A softer TPU cushions for long standing and sensitive feet; a firmer TPU supports under load; a mid firmness is a balanced default. Comfort is personal, so many people print, feel, and adjust.
A nozzle made for flexible filament prints TPU more reliably, and a thin top cover can soften the contact surface. For firmness trade-offs, print temperatures, and top covers in depth, see the TPU hardness & top cover guide, or the DIY guide to 3D-printed insoles.
Heel support & Achilles tendonitis — questions answered.
/ 01Do insoles help with Achilles tendonitis?
Many people with Achilles tendonitis look for a supportive, cushioned heel, and clinicians often discuss supportive footwear and insoles as part of everyday care. Comfort varies from person to person, and an insole is not a cure. This is not medical advice — see a podiatrist or clinician for diagnosis and for pain that persists. Ergono3D is a design tool that lets you shape the heel support and cushioning yourself and export a print-ready STL.
/ 02Are custom insoles better than store-bought for Achilles tendonitis?
Off-the-shelf insoles come in fixed sizes and a single firmness. A custom design is shaped to your own foot, so the heel cradle, cushioning, and firmness match you rather than an average. Whether that feels better is individual. With Ergono3D you can adjust the design and re-export rather than buying another pair to try.
/ 03Can I 3D-print my own insoles?
Yes. Ergono3D runs in your browser: you answer a guided survey, adjust parameters like heel cradle, cushioning, and firmness, preview the geometry, and export a print-ready TPU STL. You can print at home on a Bambu, Prusa, or similar printer, or send the STL to a print service. See our DIY guide for the printing steps.
/ 04How firm should the heel be?
There is no single right firmness — comfort depends on your foot, your footwear, and how you feel walking and standing. Ergono3D lets you set the firmness and heel cradle, then re-export a new version after wearing it, so you can iterate. A podiatrist or clinician can advise on what suits you.
/ 05How long do 3D-printed insoles last?
It depends on the TPU you use, your weight, and how much you wear them — typically months to over a year. This is not clinically validated. Because the design is a file you keep, you can re-print or adjust and re-export when a pair wears down.
Shape a custom insole and preview it free.
Answer the guided survey, tune the heel and firmness, and export a print-ready STL. The free preview includes the survey and 5 credits — no scanner, no CAD.
Custom insoles may be eligible for FSA/HSA reimbursement — check with your provider. Ergono3D is a design tool, not a treatment for Achilles tendonitis or any condition; this page isn't medical advice. For diagnosis or persistent pain, see a podiatrist or clinician.