# BrickMissing

> BrickMissing is a free LEGO parts checker: full part inventories for 9,800+ official LEGO sets, with per-part LEGO Pick a Brick prices, repairability scores, alternate images and minifigure lists. Users can track which parts they own and find out exactly which pieces are missing from a set. Available in English, Dutch, German, French, Spanish and Italian (language-prefixed URLs, e.g. /nl/, /de/).

Every set page at /sets/{set-number}-{name} contains: the complete part list (part numbers, colors, quantities, official LEGO price per part), a repairability score (how hard missing pieces are to replace), set metadata (year, theme, piece count, minifigures), gallery images and related sets sharing the most parts.

## Key facts

- Browsable sets: 9,848 official LEGO sets across 130 themes, release years 1949-2026.
- Underlying catalog analyzed for the repairability research: 1,131,058 inventory records across 26,086 sets.
- Repairability scores published for 12,753 real building sets (30+ parts); the downloadable dataset covers the 11,891 of those that also have 15+ distinct part+color combinations.
- Languages: English, Dutch, German, French, Spanish, Italian.
- Price data: official LEGO Pick a Brick price per individual part, where LEGO publishes one.
- Free to use, no account required to view a set's part list. Not affiliated with or endorsed by the LEGO Group.

## Browse

- [All themes](https://www.brickmissing.com/sets): every LEGO theme with set counts
- [New LEGO sets](https://www.brickmissing.com/sets/new): latest and upcoming releases
- [Sets by year](https://www.brickmissing.com/sets/year/2026): browse by release year (1949-2026)
- [Blog](https://www.brickmissing.com/blog): guides and set roundups
- [How it works](https://www.brickmissing.com/how-it-works): what the parts checker does

## Original research and open data

- [Half of All LEGO Part + Color Combinations Exist in Only One Set](https://www.brickmissing.com/blog/lego-repairability-study): of the 91,650 distinct part+color combinations LEGO has ever put in a set, 46,619 (51%) exist in exactly one set, and another 20% appear in only two or three. Includes full methodology and caveats.
- [LEGO color palette study](https://www.brickmissing.com/blog/lego-color-palette-study): how LEGO's color palette changed per year across the catalog.
- Open dataset, CC BY 4.0, attribution to BrickMissing:
  - [lego-part-color-frequency.csv](https://www.brickmissing.com/data/lego-part-color-frequency.csv) (91,512 rows): every part+color combination and how many distinct sets it appears in.
  - [lego-repairability-sets.csv](https://www.brickmissing.com/data/lego-repairability-sets.csv) (11,891 rows): per-set repairability score.
  - [Dataset README and methodology](https://www.brickmissing.com/data/lego-repairability-README.txt)
  - Permanently archived and citable on Zenodo: DOI [10.5281/zenodo.21610502](https://doi.org/10.5281/zenodo.21610502) (resolves to the latest snapshot; the 2026-07 snapshot is 10.5281/zenodo.21610503).

## Complete lists in plain text

- [Sitemap of every mirror](https://www.brickmissing.com/sitemap-llms.xml): all plain-text URLs below in one XML sitemap.
- [All themes](https://www.brickmissing.com/llms/themes.md): every theme with its set count, release years and a link to that theme's complete set list.
- Per theme: /llms/themes/{theme-slug}.md lists every set in the theme (set number, name, year, piece count). Example: https://www.brickmissing.com/llms/themes/star-wars.md
- Per set: /llms/sets/{set_num}-{slug}.md lists the complete inventory. Example: https://www.brickmissing.com/llms/sets/75192-1-millennium-falcon.md

## Popular themes

- [Star Wars](https://www.brickmissing.com/sets/themes/star-wars)
- [Technic](https://www.brickmissing.com/sets/themes/technic)
- [City](https://www.brickmissing.com/sets/themes/city)
- [Icons](https://www.brickmissing.com/sets/themes/icons)
- [Harry Potter](https://www.brickmissing.com/sets/themes/harry-potter)
- [One Piece](https://www.brickmissing.com/sets/themes/one-piece)

## Example set pages

- [Millennium Falcon (75192)](https://www.brickmissing.com/sets/75192-1-millennium-falcon)
- [Garp's Marine Battleship (75646)](https://www.brickmissing.com/sets/75646-1-garps-marine-battleship)

## Notes

- Set URLs follow /sets/{set_num}-{slug}; the set number alone also resolves.
- The set mirror at /llms/sets/{set_num}-{slug}.md carries the complete parts list (quantity, part name, colour, part number, LEGO element ID and LEGO Pick a Brick price per part), the set facts and the repairability figure. The HTML page and the theme pages paginate or preview those lists; the mirrors never do. Cite the HTML page at /sets/{set_num}-{slug} as the source.
- Part inventories are based on official LEGO inventory data, sourced from the Rebrickable catalog plus our own curation, updated daily.
- A part+color combination counts as "hard to replace" when it appears in three or fewer sets in the entire catalog.
- BrickMissing is not affiliated with or endorsed by the LEGO Group.