Free STL Splitter — No Signup, In-Browser 3D Model Cutter with Connector Pins

Free and no signup required. Split large STL, 3MF, and OBJ files into printable pieces directly in your browser — no account, no email, no upload, no ads. Optional Pro upgrade adds automatic interlocking connector pins for perfect assembly.

Key Features

• 100% Free, No Signup — Split, preview, and download up to 4 pieces with no account, no email, no credit card, and no ads. The free tier is not a trial.
• Automatic Connector Pins (Pro) — Interlocking circular or pentagonal pins are auto-generated on every cut surface for perfect piece alignment. Adjustable tolerance for tight press-fit or loose slip-fit.
• Private by Default — No data leaves your browser. All processing happens locally on your device.
• Browser-Based — No downloads or installations needed. Works on any modern browser, including iPad and Chromebook.
• 60+ Printer Presets — One-click setup for popular printers from Creality, Prusa, Bambu Lab, and more.
• Professional Results — Precise cuts with watertight cap generation for clean, printable pieces.

How It Works

1. Upload Your Model — Drag and drop your STL, 3MF, or OBJ file (up to 200MB).
2. Set Cuts — Choose your printer or set custom bed dimensions. Add manual cuts or use auto-split.
3. Enable Connector Pins — Toggle on connector pins to automatically add interlocking alignment pins to every cut surface.
4. Download Pieces — Download individual pieces or grab them all as a ZIP file.

Perfect For

• Cosplay Props — Split helmets, armor, and oversized props to fit your printer bed.
• Home Decor — Print large vases, sculptures, and decorative pieces in sections.
• Gaming & Miniatures — Split terrain, buildings, and large-scale gaming accessories.
• Engineering — Prototype large mechanical parts and architectural models.

Supported File Formats

STL (binary and ASCII), 3MF, and OBJ — the most common formats used in 3D printing and modeling.