Free to use • No credit card needed

How It Works

Discover what you can build with the LEGO sets you already own. It's easier than you think.

3 Simple Steps

From your LEGO collection to new builds in minutes

1

Add Your Sets

Enter the set numbers of the LEGO sets you own. We'll automatically import all the parts and pieces from each set.

  • Quick set number lookup
  • Automatic part import
  • Track quantities
📦
75301
X-Wing Starfighter™
+ Add
📦
42151
Bugatti Bolide
2

Discover What You Can Build

We analyze your entire part collection and find other LEGO sets you can build – either fully or with just a few missing pieces.

  • Instant buildability check
  • "Almost buildable" suggestions
  • Percentage completion tracking
🏰
100% ✓
Castle Set
🚀
100% ✓
Space Ship
🏎️
96%
Race Car
✈️
92%
Airplane
3

Get Missing Parts

For sets you're close to completing, we show exactly which parts you need. Buy them from trusted marketplaces with region-based pricing.

  • Exact part lists
  • BrickLink & BrickOwl links
  • Region-based shop suggestions
Missing Parts8 parts
2×4 Brick×3
1×2 Plate×2
Technic Pin×3
20,000+
LEGO Sets
50,000+
Unique Parts
100%
Free to Use
5
Languages

Perfect For

Whether you're a casual builder or a serious collector

Families

Keep kids entertained by discovering new builds from sets you already have.

AFOLs

Adult fans with large collections can find hidden building potential.

MOC Builders

Know exactly what parts you have before starting your next creation.

Ready to Start?

Add your first set and see what you can build in seconds.

Try It Free

No account required • Start building in seconds