renderboundOpen studio
Local first + server fallback

STL Repair

Run a fast local inspection first. Watertightness, inverted normals, degenerate faces, and small holes are repaired locally when possible, with an isolated server fallback for difficult meshes.

No signup Full-quality download One file at a time
Processed privately in your browserNo upload · No account · Unlimited
.stl

Your finished file appears here.

The source never travels across the network.

Local repair did not solve it? Use the robust server fallback
Isolated server processing3 free / day · 50 MB · deleted within 24h
Turnstile is bypassed only in local development. Add the public site key before deployment.
.stl

Full-quality output, no account.

One file at a time. Private objects are removed automatically.

How it works

  1. 1

    Choose a file

    Select .stl from your device.

  2. 2

    Process locally

    Processing runs in browser memory without an upload.

  3. 3

    Download and leave

    Get the .stl without giving Renderbound an email address.

Common questions

Do I need an account?

No. Free tools finish with a download and never ask for an email address.

Where is my file processed?

This tool runs inside your browser. Renderbound never receives the source file.

How long are server files kept?

Temporary inputs and outputs are deleted after download where possible, with a 24-hour lifecycle rule as the hard backstop.

Related 3D tools

STL Viewer

Preview STL files before repair, slicing, or conversion.

Simplify Mesh

Reduce triangle count while keeping the model’s silhouette.

GLB → FBX

Convert a GLB model into an engine-ready FBX file.