🧰 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 →Sherlock Holmes Reading Order
All 60 Holmes stories in publication order, in the chronological order of the cases, or as a 12-story starter path, with a reading tracker that remembers what you have read.
🩺 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 →Deduction Studio
The new deduction board. Paste any text (a mystery, an email, a strange situation) and Holmes investigates it: clues quoted from your own words, competing explanations eliminated, and a verdict with an honest confidence.
🕵️ 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 →Porlock's Book Cipher
Encode and decode book ciphers with word numbers, watch Holmes crack Porlock's Valley of Fear message, and try the Gloria Scott and Red Circle codes.
🕷️ Professor Moriarty About & launch →The OOP Deduction Lab
Alan Kay's dream, taken literally: every clue becomes an object with its own AI mind — they state beliefs, deliberate in pairs, and vote on the verdict.
🎩 Mycroft 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 →221B Baker Street (3D)
Walk Sherlock Holmes's sitting room at 221B Baker Street in free first-person 3D and hunt for hidden objects straight out of the stories — the Persian slipper, the bullet-pocked V.R., the Stradivarius, the jack-knifed letters.
🫖 Mrs Hudson About & launch →The Speckled Band (3D)
A free first-person 3D Sherlock Holmes game of The Speckled Band: search the bedrooms at Stoke Moran, then keep the night vigil against the swamp adder.
🕵️ Sherlock Holmes About & launch →Hansom Cab Chase
"Follow that cab!" Drive Holmes and Watson through foggy, gaslit London, keep the suspect in sight, and get close enough to read his cab number. Four cases from the canon.
🕵️ 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, rain-wet setts, drifting fog, and seven places from the canon to discover — 221B among them.
🕵️ Sherlock Holmes About & launch →Moriarty's Minions
The Professor's web hangs over Baker Street, and his men are coming down its threads. Hold the pavement as Holmes, then face Moriarty himself. Hand-painted 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 →Deduction Studio
The new deduction board. Paste any text (a mystery, an email, a strange situation) and Holmes investigates it: clues quoted from your own words, competing explanations eliminated, and a verdict with an honest confidence.
🕵️ 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 →The Speckled Band (3D)
A free first-person 3D Sherlock Holmes game of The Speckled Band: search the bedrooms at Stoke Moran, then keep the night vigil against the swamp adder.
🕵️ Sherlock Holmes About & launch →Hansom Cab Chase
"Follow that cab!" Drive Holmes and Watson through foggy, gaslit London, keep the suspect in sight, and get close enough to read his cab number. Four cases from the canon.
🕵️ 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, rain-wet setts, 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 →The OOP Deduction Lab
Alan Kay's dream, taken literally: every clue becomes an object with its own AI mind — they state beliefs, deliberate in pairs, and vote on the verdict.
🎩 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 →Sherlock Holmes Reading Order
All 60 Holmes stories in publication order, in the chronological order of the cases, or as a 12-story starter path, with a reading tracker that remembers what you have read.
🩺 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 →Porlock's Book Cipher
Encode and decode book ciphers with word numbers, watch Holmes crack Porlock's Valley of Fear message, and try the Gloria Scott and Red Circle codes.
🕷️ Professor Moriarty About & launch →Moriarty's Minions
The Professor's web hangs over Baker Street, and his men are coming down its threads. Hold the pavement as Holmes, then face Moriarty himself. Hand-painted 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.
221B Baker Street (3D)
Walk Sherlock Holmes's sitting room at 221B Baker Street in free first-person 3D and hunt for hidden objects straight out of the stories — the Persian slipper, the bullet-pocked V.R., the Stradivarius, the jack-knifed letters.
🫖 Mrs Hudson 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 →🐕 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.