🧰 The Baker Street Toolbox
Free tools, each championed by a character from the canon. Every tool has a description page and a full-screen app, and the AI behind them is included — nothing to sign up for, nothing to configure.
💼 The Consulting Room Professional
Instruments for work and study — analysis, decisions, chronology, memory, goals, and manuscript craft.
Think Like Sherlock — The Campaign
A seven-case campaign that trains you, step by measurable step, in Holmes's method: observation, memory, deduction, elimination, induction, and defense against bad reasoning — with XP, ranks, and graded examinations.
🕵️ Sherlock Holmes About & launch →Sherlock's Mind Palace
Build your own mind palace, Sherlock-style: a spatial memory palace on a full-screen canvas with rooms, vivid memories, and a walk-through practice mode.
🕵️ Sherlock Holmes About & launch →Moriarty's Web
A mind-map for reasoning: claims, premises, thread strengths, and named fallacies — exportable to Markdown.
🕷️ Professor Moriarty About & launch →Eliminate the Impossible
Root-cause analysis on Holmes's principle: facts extracted, every hypothesis tested, the impossible struck out.
🕵️ Sherlock Holmes About & launch →The Reichenbach Timeline
Prose becomes chronology: interactive timelines with per-person threads, from any tangled narrative.
🩺 Dr. John Watson About & launch →Mycroft's Memory Palace
The method of loci for your lists: vivid scenes along a fixed walk through 221B, with a practice drill.
🎩 Mycroft Holmes About & launch →Watson's Case Files
A development editor for mystery writers: plot holes, fair-play audit, clue ideas — then an editorial interview.
🩺 Dr. John Watson About & launch →The Induction Engine
From instances to rules: paste repeated observations and get candidate generalisations ranked by confidence, each with the counterexample that would break it.
🕵️ Sherlock Holmes About & launch →Mind Map Studio
An AI-driven mind-mapper: generate a full map from any topic or pasted text, expand branches with one click, chat to reorganize — plus fast keyboard editing and export to Markdown, JSON, or PNG.
🎩 Mycroft Holmes About & launch →Toby's Trail
Set a goal, let AI break it into a scent-trail of milestones, and track your pursuit paw-print by paw-print.
🐕 Toby About & launch →🎭 The Game Room Hobbyist
Games, lore, and secret messages for Baker Street irregulars. Atmosphere included at no extra charge.
Sherlock Deduction Board
The flagship. Paste a mystery and watch AI extract clues, connect the evidence, and reason to a conclusion on a living board.
🕵️ Sherlock Holmes About & launch →The Dog That Didn't Bark
Train the rarest skill in reasoning: spotting the significant absence — the thing that should have happened and pointedly did not.
🕵️ Sherlock Holmes About & launch →The Trace Evidence Bureau
Read ash, mud, prints, and typefaces like Holmes: let each trace narrow the field until only one candidate satisfies them all.
🕵️ Sherlock Holmes About & launch →The Science of Deduction
Study a stranger's visible details in your field notebook, write your deductions, and have Holmes grade every claim.
🕵️ Sherlock Holmes About & launch →Lestrade's Lineup
An AI whodunit you play: five suspects, fifteen questions, one lie. Interrogate, spot it, accuse.
🚨 Inspector Lestrade About & launch →Dancing Men Cipher Bureau
Secret messages in the famous stick-figure cipher, plus Caesar (with a cracker), Vigenère, and Atbash — instant, in your browser.
🕵️ Sherlock Holmes About & launch →The Gaslight Study (3D)
A first-person 3D investigation in three.js: walk a gaslit study, examine five clues, and name the killer.
🕵️ Sherlock Holmes About & launch →Hansom Cab Chase
A real arcade runner: steer the hansom through gaslit night traffic, grab the evidence, don't crash. Pure canvas, no key needed.
🕵️ Sherlock Holmes About & launch →Baker Street Gems
A proper match-3 in full Victorian dress: swap clues, chain cascades, and clear the evidence board — with music and sound effects, free in your browser.
🕵️ Sherlock Holmes About & launch →The Seventeen Steps
The classic sliding-tile puzzle on a photograph of gaslit Baker Street: fifteen tiles, one gap, and your wits.
🩺 Dr. John Watson About & launch →The Torn Photograph
A jigsaw puzzle from the site's own portrait of 221B: drag the scattered pieces home and restore the photograph.
🌹 Irene Adler About & launch →The Cluttered Study
A hidden-objects hunt through five Victorian scenes — the sitting room at 221B, the manor library, rain-washed Baker Street and more — eight items lost in each, against the clock.
🫖 Mrs Hudson About & launch →Baker Street Nights (3D)
Walk Baker Street by night in full 3D: gaslit terraces, drifting fog, and seven places from the canon to discover — 221B among them.
🕵️ Sherlock Holmes About & launch →Moriarty's Minions
Bowler-hatted henchmen descend on 221B in marching ranks — hold the line with bolts of pure logic. Canvas arcade.
🕷️ Professor Moriarty About & launch →The Grimpen Moor (3D)
Walk Dartmoor by night in open 3D: rolling moor, granite tors, the deadly Grimpen Mire with its wand-marked path — and seven places from The Hound of the Baskervilles.
🕵️ Sherlock Holmes About & launch →Pigeon Post
One brave bird, one urgent dispatch, and a skyline full of chimneys. Tap to flap. Canvas arcade.
🩺 Dr. John Watson About & launch →Baker Street Trivia
Twelve-question rounds on the canon — cases, characters, and details only a true Irregular remembers.
🩺 Dr. John Watson About & launch →Cipher Sprint
Sixty seconds, dancing men marching in — decode as many words as you can before the clock runs out.
🕵️ Sherlock Holmes About & launch →🕵️ Sherlock Holmes
The consulting detective himself.
Sherlock Deduction Board
The flagship. Paste a mystery and watch AI extract clues, connect the evidence, and reason to a conclusion on a living board.
🕵️ Sherlock Holmes About & launch →Think Like Sherlock — The Campaign
A seven-case campaign that trains you, step by measurable step, in Holmes's method: observation, memory, deduction, elimination, induction, and defense against bad reasoning — with XP, ranks, and graded examinations.
🕵️ Sherlock Holmes About & launch →Sherlock's Mind Palace
Build your own mind palace, Sherlock-style: a spatial memory palace on a full-screen canvas with rooms, vivid memories, and a walk-through practice mode.
🕵️ Sherlock Holmes About & launch →Eliminate the Impossible
Root-cause analysis on Holmes's principle: facts extracted, every hypothesis tested, the impossible struck out.
🕵️ Sherlock Holmes About & launch →The Dog That Didn't Bark
Train the rarest skill in reasoning: spotting the significant absence — the thing that should have happened and pointedly did not.
🕵️ Sherlock Holmes About & launch →The Trace Evidence Bureau
Read ash, mud, prints, and typefaces like Holmes: let each trace narrow the field until only one candidate satisfies them all.
🕵️ Sherlock Holmes About & launch →The Science of Deduction
Study a stranger's visible details in your field notebook, write your deductions, and have Holmes grade every claim.
🕵️ Sherlock Holmes About & launch →Dancing Men Cipher Bureau
Secret messages in the famous stick-figure cipher, plus Caesar (with a cracker), Vigenère, and Atbash — instant, in your browser.
🕵️ Sherlock Holmes About & launch →The Induction Engine
From instances to rules: paste repeated observations and get candidate generalisations ranked by confidence, each with the counterexample that would break it.
🕵️ Sherlock Holmes About & launch →The Gaslight Study (3D)
A first-person 3D investigation in three.js: walk a gaslit study, examine five clues, and name the killer.
🕵️ Sherlock Holmes About & launch →Hansom Cab Chase
A real arcade runner: steer the hansom through gaslit night traffic, grab the evidence, don't crash. Pure canvas, no key needed.
🕵️ Sherlock Holmes About & launch →Baker Street Gems
A proper match-3 in full Victorian dress: swap clues, chain cascades, and clear the evidence board — with music and sound effects, free in your browser.
🕵️ Sherlock Holmes About & launch →Baker Street Nights (3D)
Walk Baker Street by night in full 3D: gaslit terraces, drifting fog, and seven places from the canon to discover — 221B among them.
🕵️ Sherlock Holmes About & launch →The Grimpen Moor (3D)
Walk Dartmoor by night in open 3D: rolling moor, granite tors, the deadly Grimpen Mire with its wand-marked path — and seven places from The Hound of the Baskervilles.
🕵️ Sherlock Holmes About & launch →Cipher Sprint
Sixty seconds, dancing men marching in — decode as many words as you can before the clock runs out.
🕵️ Sherlock Holmes About & launch →🎩 Mycroft Holmes
The smarter brother, rarely out of his chair.
Mycroft's Memory Palace
The method of loci for your lists: vivid scenes along a fixed walk through 221B, with a practice drill.
🎩 Mycroft Holmes About & launch →Mind Map Studio
An AI-driven mind-mapper: generate a full map from any topic or pasted text, expand branches with one click, chat to reorganize — plus fast keyboard editing and export to Markdown, JSON, or PNG.
🎩 Mycroft Holmes About & launch →🩺 Dr. John Watson
Chronicler, physician, first reader.
The Reichenbach Timeline
Prose becomes chronology: interactive timelines with per-person threads, from any tangled narrative.
🩺 Dr. John Watson About & launch →Watson's Case Files
A development editor for mystery writers: plot holes, fair-play audit, clue ideas — then an editorial interview.
🩺 Dr. John Watson About & launch →The Seventeen Steps
The classic sliding-tile puzzle on a photograph of gaslit Baker Street: fifteen tiles, one gap, and your wits.
🩺 Dr. John Watson About & launch →Pigeon Post
One brave bird, one urgent dispatch, and a skyline full of chimneys. Tap to flap. Canvas arcade.
🩺 Dr. John Watson About & launch →Baker Street Trivia
Twelve-question rounds on the canon — cases, characters, and details only a true Irregular remembers.
🩺 Dr. John Watson About & launch →🕷️ Professor Moriarty
The spider at the centre of the web.
Moriarty's Web
A mind-map for reasoning: claims, premises, thread strengths, and named fallacies — exportable to Markdown.
🕷️ Professor Moriarty About & launch →Moriarty's Minions
Bowler-hatted henchmen descend on 221B in marching ranks — hold the line with bolts of pure logic. Canvas arcade.
🕷️ Professor Moriarty About & launch →🚨 Inspector Lestrade
Scotland Yard's most persistent man.
🌹 Irene Adler
The Woman — the one who beat him.
🫖 Mrs Hudson
Landlady of 221B, patience of a saint.
🐕 Toby
The bloodhound who never loses the scent.
Have an idea for a Baker Street tool? Write to us — the best suggestions jump the queue.