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Get audio file info

Deep forensic analysis of audio files

Upload a recording and get its chords with fingering diagrams, key and tempo. Capo, transpose, slow-down and loop for practice.

Detect tempo, key, Camelot and time signature

Upload an audio file to identify its genre, mood, dominant instruments, BPM and musical key.

View and edit audio file metadata tags

Analyze audio for signs of editing, splicing, or AI generation.

Find splices, cuts and edits in audio recordings using six forensic detectors with millisecond precision.

Embed invisible watermark in audio to prove ownership

Slow any sound down to 500x without changing pitch and inspect it under a live spectrogram with note and frequency readout.

Hum or upload a melody and get chords that fit under it: diagrams for guitar, ukulele and piano, capo, transpose and MIDI export.

Transcribe any audio recording into notes, MIDI, and sheet music using AI.

Scan any score photo or PDF and hear the notes back.

Convert Guitar Pro (GP3-GP8, GPX) and MusicXML tabs to MIDI in your browser. Pick tracks, preview, and download.

Upload a track and get the list of instruments plus a map of where each one enters.

Compare two audio files side-by-side with objective metrics — LUFS, spectrum, dynamic range, ABX blind test, sample-level diff.

Compare your mix to a reference track: LUFS, spectrum, dynamics, stereo and precise recommendations.

Hearing which frequency is the problem is a skill built by repetition. Everything you need for that is here.

Reads a MusicXML or MIDI score and shows what the orchestra cannot play: notes out of range, no room to breathe, impossible harp chords.

Ear training on piano sounds: intervals, major or minor, chords and a perfect pitch test. Rounds of 10 questions with a review of your mistakes.

Hear your audio in 60+ environments

Generate white, pink and brown noise

Generate silence files with comfort noise options

Brainwave entrainment with binaural frequencies

Generate loud creepy sounds or boost audio up to 400%

Create custom alarm and notification sounds

Generate doorbell sounds, chimes, and melodies. 35 presets, custom synthesizer, melody composer, multiple export formats.

Brainwave entrainment with pulsing isochronic tones

Generate precise audio tones, sweep frequencies, mix oscillators, play DTMF phone tones, export WAV. Web Audio API.

Generate and decode telephone touch-tones with ITU-T Q.23 precision — keypad, sequence player, microphone decoder, multi-region call-progress tones, WAV/MP3 export.

Generate ultrasonic frequencies beyond human hearing. Up to 48 kHz with 96 kHz sample rate. Real-time spectrum analyzer.

Convert text to Morse code audio

Silent ultrasonic whistle for dog training

Ultrasonic dog repellent with siren and auto-off timer

Ultrasonic rodent repellent sound generator

Ultrasonic cockroach repellent with anti-habituation patterns

Generate deterrent sounds in the 1–5 kHz bird hearing range — 8 synthesized modes, species targeting, anti-habituation timer.

Steer a little penguin over cracks and ice holes, catch fish to stay warm, and journey across the frozen wild to a distant mountain.

Online memory game for brain training and cognitive exercise

Online snake arcade game with 4 modes, power-ups, and themes

Navigate procedurally generated mazes with increasing difficulty. Four modes from easy to extreme.

Push all boxes onto the goal markers. 155 hand-crafted levels from easy to expert.

Slide tiles with arrow keys or swipe. Merge matching numbers to reach 2048!

Free volleyball game for two players. Play against AI, together on one keyboard, or online with friends.

Play the Russian Durak (Fool) card game

Click one button and watch a single live world counter tick upward together. Back your country in the daily click battle. Free, in your browser.

Toggle lights to turn them all off. Clicking a light flips it and its neighbors.

Play Minesweeper in your browser: boards solvable by pure logic, hints that show the proof, touch controls made for phones. Online, no sign-up.

Slide numbered tiles into the correct order. Choose 3x3, 4x4, or 5x5 grid size.

Fill the entire board with one color in the fewest moves possible.

Use number clues to fill cells and reveal hidden pixel art pictures. 20+ puzzles from easy to hard.

Sudoku online: five levels graded by solving technique, hints that explain every step, a daily puzzle, your own puzzles and printable PDF sheets.

Move the knight across every square of a 5×5–10×10 board, numbering them 1 to 100. Dead-end warnings and a solver.

Rearrange seven shapes to match the target silhouette. Drag, rotate with R, flip parallelograms with F.

10 interactive browser games designed for cats to play on tablets, phones, and screens.

A fun jumping game for kids — help a cute cat bounce from platform to platform and reach for the sky.

Rotate pipe segments to connect the water source to every endpoint. Tap or click to rotate.

Play the classic dinosaur runner game — jump over obstacles and set your high score

Free air hockey game with single player, local and online multiplayer modes, power-ups, and 4 table themes.

Turn-based artillery duel with 18 weapons, wind and destructible terrain — play vs computer, 2 players, or online.

Drop wooden shapes onto the grid, clear lines, and beat your record.

Play tic tac toe online against smart bots or with friends by shareable link

Name a city; the next must begin with its last letter.

Rules of Russian drafts: how men and kings move, why capturing is compulsory, how the five variants differ. With diagrams and hands-on lessons.

Play checkers online — Russian, international, American or English rules, vs AI bot or by shareable link

Play chess online against the engine with hints and undo

Browser remake of the Soviet LCD handheld — catch eggs in the basket

Mahjong solitaire with 144 tiles: 22 layouts, full screen, an honest hint. If the board stops being solvable, the game tells you at once.

Klondike, Spider and FreeCell with deals a solver has checked can be won. Tap or drag, undo any move, large cards, whole screen. In the browser.

Play rock paper scissors with buttons or real hand gestures on camera against an AI that learns from your moves.

Virtual pocket pet to feed and care for

Daily Trail logic puzzle — connect numbered points

A countdown shaped like a bomb: a fuse from 3 seconds to an hour, four sounds, a wire mini-game and a stream overlay.

3D dice you can watch tumble: d4–d100, advantage and disadvantage, 4d6kh3, exploding dice, odds before you roll and face statistics.

Turn order for combat: roll initiative for everyone at once, rounds, hit points, timed conditions and an SRD bestiary. Works on a phone.

Bingo caller for 75- and 90-ball bingo and Russian lotto: voice calls, TV view, printable card PDFs and a win check by card number.

Players' phones become game-show buzzers; the host sees who pressed first, to the millisecond, even on slow Wi-Fi. Jeopardy-style, trivia, teams.

Everyone puts a finger on the screen and one is picked at random: a winner, a loser, balanced teams or the turn order. Works in any browser.

A bank for board games and home poker: each phone is a wallet. Transfers, requests, undo of any entry, side pots and a blinds timer. No install.

Play backgammon and long nardy free, no sign-up: a neural-net computer at 4 levels, two players or a friend by link. Game review, dice you can verify.

Battleship against the computer with classic rules: a 10×10 grid, ten ships and three opponents. Play with a mouse, a keyboard or a screen reader.

Hear a street, market or train somewhere on Earth and pin it on the world map. 60 real places, 40 languages to guess and a sound of the day.