Sherlock's Mind Palace — Build Your Own Memory Palace
🕵️ A Sherlock Holmes tool — The consulting detective himself
Sherlock's famous mind palace — the memory technique the canon calls the brain attic — made spatial. Lay rooms out on a full-screen floor plan, furnish each with vivid memory scenes — by hand or generated by AI from whatever you need to remember — then walk the route: the camera glides room to room while you recall what each one holds. Your palace is saved in your browser, ready to be walked again tomorrow.
- ✅ Free
- ✨ AI features with a free Google sign-in
- 🌐 Runs in your browser
What it does
A real floor plan
An architect's floor plan: walled rooms with doorways, a footprinted corridor showing the route, rooms you drag into place — the geography your memory will walk.
AI palace builder
Give it a list or topic and it designs the rooms and plants vivid, absurd, memorable scenes in each.
Walk-through practice
Glide through the route in a spotlight, recall each memory before revealing it, grade yourself, and see exactly what you missed.
How to use it
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1
Build rooms by hand, or let AI design the palace from your list.
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2
Read each room's scenes — the more absurd, the more they stick.
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3
Enter Walk mode and prove the route is yours.
What is Sherlock's mind palace?
A mind palace is an imaginary building you know so well that you can walk through it in your head. You store each thing you need to remember in a particular spot along the way, then take the same walk later to get it back. Psychologists call it the method of loci, from the Latin for "places", and it is one of the most reliable memory techniques ever tested.
The phrase "mind palace" comes from the BBC series Sherlock, where Benedict Cumberbatch's Holmes retreats into his to search what he knows, most famously in "The Hounds of Baskerville". Conan Doyle's Holmes has his own version. In A Study in Scarlet he tells Watson that a man's brain is like "a little empty attic", to be furnished carefully with only the tools he needs. That idea is usually called the brain attic.
How to build a mind palace
Start with a place: a house you know, or rooms you invent here. Fix a route through it, from the front door to the kitchen to the study, and always walk it in the same order. The footprints on the floor plan show yours.
Then give every item a scene in one room. The scene should be vivid, a little absurd and full of the senses. To remember "potassium", don't just picture a banana in the hall. Picture a banana the size of a sofa blocking the hall, peeling itself and smelling of fireworks. Odd, specific images stick, and plain ones don't.
Finally, walk the palace. Recall each room's scenes before you look, and come back tomorrow and the day after. Spaced practice turns a clever trick into memory you can rely on. Walk mode does this for you: it hides each memory until you have tried to recall it and keeps a list of what you missed.
What people use it for
Exam facts and vocabulary, speeches and presentations given without notes, the order of a chess opening or a deck of cards, the names at a new job, shopping lists, and of course every Sherlock Holmes story in publication order. Memory champions use the same technique to remember thousands of digits.
For quick list-based memorisation without the floor plan, see Mycroft's Memory Palace — the two make a matched pair.
Frequently asked questions
Is the mind palace real?
Yes. The mind palace is a fictional name for a real technique, the method of loci, which goes back to ancient Greece. Studies have found it markedly improves recall of ordered lists, and memory athletes rely on it.
Did Sherlock Holmes have a mind palace in the books?
Not by that name. In A Study in Scarlet, Holmes describes his brain as an attic to be stocked carefully, the brain attic. The term "mind palace" was popularised by the BBC series Sherlock (2010–2017).
How do I build a mind palace like Sherlock?
Choose a place you can picture, fix a route through its rooms, put one vivid scene for each item in each room, and walk the route regularly. This tool gives you the floor plan, writes scenes if you are stuck, and runs the practice walk.
How many things can a mind palace hold?
As many as you have places for. Three or four memories per room is comfortable, and you can always add rooms. Memory champions keep several palaces of hundreds of locations each.
Is this mind palace tool free?
Yes. Building rooms, writing your own scenes, walk mode and Markdown export are free with no sign-up. The AI architect and ✨ Vivify are also free, and need a free Google sign-in. Your palace is saved in your own browser.