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A growing kit of free web tools and resources for everyone. No sign-up required and no personal info needed — open a tool and use it right in your browser. Most run entirely on your device, so your data never leaves it.

Music

Music Everything for learning music in one place: free piano sheet music for kids, jazz guitar for beginners, music theory, piano chords and blank staff paper, with a play button on every piece. Music

New on DG Tools

An ASMR generator, free piano sheet music for kids, a sheet music player, a gym timer with your music beside it for iPad, two games, a jazz generator, an online piano, a Morse code translator, screens to leave on while you listen to music, and an early look at our music player.

Online Metronome A steady click for piano and any instrument. Tap the tempo, pick any time signature, set each beat’s accent, and build speed with the trainer. Music New ASMR Generator Tapping, brushing, crinkling, soft whispers, rain and more, made live in your browser, so the pattern never repeats. Mix them and move them from ear to ear. Ambient screens New Piano Sheet Music for Kids Beginner piano pieces for children, free to print: nursery rhymes, folk songs, carols and classical themes as proper sheet music, each on its own page with a play button, practice notes and a short history. Music New Sheet Music Player Paste in sheet music and hear it played on a grand piano, with each note lit up as it sounds. Slow it down, change key or loop it. Music New Workout Timer + Music (iPad) The workout timer on the left and your own music on the right. One-tap rests between sets, a beep when rest is up, and full screen for the gym. Everyday & calculators New Jazz Generator A small jazz band that makes up its music as it plays. Pick a room, then change the mood, tempo, swing and instruments. Music New Jack’s Renewal Run A free runner game. Help Jack the greyhound get a domain past pre-ticked add-ons, fake countdowns, renewal price hikes and a cancel flow that won’t let go. Game New Dead Air: Coolabah Crossing A free outback wasteland game. Scavenge a dusty town for radio parts, craft inventions and get the old relay back on air. Game New Online Piano Keyboard A 61-key piano to practise on with your computer keys, mouse or touch, with every note and chord named. Music New Morse Code Translator Text to Morse and back, then hear it, watch it flash or tap out your own on the key. Encoders & converters New Free Online Music Player Ironbark, our music player, in your browser. Play the music on your computer: no ads, no sign-up, nothing uploaded. Music Experimental Reel-to-Reel Screen A vintage tape deck playing live jazz, with turning reels and VU meters that follow the music. Ambient screens New New York at Night The skyline from the river, or an avenue of yellow cabs and neon, with live jazz. Ambient screens New Ice Skating in Central Park Skaters gliding under string lights with the city behind them, and a little jazz band playing. Ambient screens New Fireplace Screen A crackling fire in a stone hearth, brick fireplace or campfire, with a sleep timer that lets it burn down. Ambient screens New Snow Screen Quiet snowfall on a lamplit street, a pine forest or past a frosted cabin window. Ambient screens New Rain Screen Rain on a city street or a wet window, with lightning, a clock and a sleep timer. Ambient screens New
  • ABN Lookup — Look up an ABN, ACN or business name on the Australian Business Register: who it belongs to, whether it's active, and whether they're registered for GST.
  • Age Calculator — Exact age in years, months and days, plus total days and a birthday countdown.
  • ASMR Generator — ASMR trigger sounds made live in your browser: tapping, scratching, brushing, crinkling, bubble wrap, pages, typing, soft whispers, water, rain and fire. Mix them, move them from ear to ear in 3D, and set the pace and closeness. No recordings, so the pattern never repeats. Works offline.
  • Base64 Encode / Decode — Encode or decode Base64 text, and turn files into data-URIs — all in your browser.
  • Bill Splitter & Tip — Split a bill between any number of people, with an optional tip, and see each share.
  • BMI Calculator — Body Mass Index from height and weight, metric or imperial, with the standard ranges.
  • BSB Lookup — Which bank or institution issued a BSB, whether it’s the right shape and the state it usually belongs to. A quick check on an invoice’s bank details.
  • Colour Converter — Convert any colour between HEX, RGB and HSL, with a live preview and picker.
  • Colour Palette Generator — Turn one brand colour into matching accents and a 50–900 scale of tints and shades. Export to CSS, SCSS, Tailwind or JSON.
  • Discount / Sale Price — Work out a sale price and your real saving, including stacked 'extra % off' deals.
  • DNS Record Lookup — A, AAAA, CNAME, MX, TXT, NS, SOA and CAA records for any domain in one view, with plain-English notes.
  • Fireplace Screen — A crackling full-screen fire to put on while you listen to music: a stone hearth, brick fireplace or campfire, with sparks, a clock and a sleep timer that lets it burn down. Works offline.
  • Free Online Music Player — Play the music files on your computer in your browser with Ironbark. No ads, no sign-up, nothing uploaded. Opens a whole folder of albums.
  • GST Calculator — Add or remove Australian 10% GST. Inclusive, exclusive and the GST component.
  • Hash Generator — MD5, SHA-1, SHA-256/384/512 from text or a file, plus a checksum-match check.
  • HTML Entity Encoder — Escape text to HTML entities or decode them back — the core XSS-safe escapes.
  • Ice Skating in Central Park — An outdoor rink in Central Park with skaters gliding under string lights and the skyline behind, and live jazz. Dusk or night, with snow. Works offline.
  • Image Transparency Checker — Is the background really transparent, or a fake checkerboard baked into the pixels? Detects the real alpha channel, and fixes a fake one.
  • Invoice Due-Date Calculator — When an invoice is due from its payment terms (net 30, 30 days EOM, 20th of next month, business days), skipping weekends and your state's public holidays.
  • Jazz Generator — A small jazz band that makes up its music as it plays: piano, bass, drums and a lead, never the same tune twice. Pick a room, then change the mood, tempo, swing, instruments and mix. Records, and works offline.
  • JSON Formatter & Validator — Pretty-print, validate and minify JSON with a clear pointer to the first error.
  • JWT Decoder — Read a JWT's header and payload with human-readable expiry. Decoded locally — never sent.
  • Loan Repayment Calculator — Estimate monthly repayments and total interest on a personal, car or business loan.
  • Meta & Open Graph Toolkit — Write title, description and Open Graph tags with Google, Facebook, LinkedIn and X previews — or paste a page's source to audit it.
  • Morse Code Translator — Text to Morse and back as you type. Hear it, watch it flash, save a WAV, or tap it out yourself.
  • MX & Email Setup Check — MX, SPF, DKIM and DMARC for any domain, with the SPF lookup count and a plain-English list of what to fix.
  • New York at Night — New York after dark with live jazz: the skyline from the river with a lit bridge and ferry, or an avenue with yellow cabs, neon and steam. Works offline.
  • Online Metronome — A steady click for piano and any instrument: 20 to 300 BPM, tap tempo, any time signature, accents you set beat by beat, subdivisions and swing, six sounds, a pendulum, a speed trainer and silent-bar practice. Works offline.
  • Online Piano Keyboard — A 61-key piano to practise on away from your keyboard. Play with your computer keys, mouse or touch, see every note and chord named, with scales, a metronome and a recorder. Works offline.
  • Password Generator — Generate strong random passwords with a live entropy estimate. Nothing leaves your browser.
  • Percentage Calculator — What is X% of Y, X is what % of Y, and the percentage change between two numbers.
  • Piano Sheet Music for Kids — Beginner piano pieces for children, free to print: nursery rhymes, folk songs, carols, spirituals, rounds and classical themes, from Twinkle Twinkle to the Minuet in G, every one in C major, in six levels starting from C position (right thumb on middle C). Proper full-size sheet music with finger numbers and the words, a play button on every piece, and a page for each with practice notes and a short history.
  • Pwned Password Check — See if a password has appeared in a data breach. Only five characters of its hash leave your browser.
  • QR Code Generator — QR codes for a website, Wi-Fi, contact card, email, phone or SMS. Static, never expire, PNG or SVG.
  • Rain Screen — Full-screen rain to put on while you listen to music: a city street or a wet window, with lightning, a clock and a sleep timer. Works offline.
  • Reel-to-Reel Screen — A vintage reel-to-reel deck playing live jazz: turning reels, moving tape and VU meters that follow the music. Sax, flute or vibes lead. Works offline.
  • Sheet Music Player — Paste sheet music (ABC notation, MusicXML or letter notes) and hear it played on a grand piano, with each note lit up on the score. Slow it down, change key, loop it and download MIDI. Works offline.
  • Slugify (URL Slug) — Turn a title into a clean, lowercase URL slug — accents and punctuation stripped.
  • Snow Screen — Quiet full-screen snowfall for music: a lamplit street, a pine forest or a frosted cabin window, with wind, a clock and a sleep timer. Works offline.
  • SSL Certificate Checker — When a site's certificate expires, who issued it, which names it covers and whether browsers trust it, including missing intermediates. Plain-English fixes.
  • Subnet / CIDR Calculator — Network, broadcast, mask, host range and usable host count for any IPv4 CIDR block.
  • Text Case Converter — Convert text between camelCase, snake_case, kebab-case, Title Case and more.
  • Unit Converter — Convert length, weight, temperature, volume, area and speed between metric and imperial.
  • Unix Timestamp Converter — Convert epoch ↔ date in UTC, local and Australian Eastern time, seconds or milliseconds.
  • URL Encode / Decode — Percent-encode or decode URLs and query strings, with Unicode handled correctly.
  • UUID / ULID Generator — Generate UUID v4, time-ordered UUID v7 and ULIDs, single or in bulk.
  • WCAG Contrast Checker — Check colour contrast ratios against WCAG AA and AAA for text and UI.
  • Website Health Check — One address in, a scored report out: HTTPS and certificate, redirects, security headers, speed from Australia, title, description, robots.txt and sitemap, with a fix for each problem.
  • What's My IP — Your public IP address, reverse DNS, and the network facts your browser reveals.
  • WHOIS Lookup — Who a domain is registered with, when it expires, its locks in plain English, nameservers and DNSSEC, straight from the registry (RDAP). Shows the registrant for .au domains.
  • Word & Character Counter — Live word, character, sentence and paragraph counts, with reading and speaking time.
  • Workout & Rest Timer — Session countdown plus one-tap rest timers between sets, with a beep that stops on its own.
  • Workout Timer + Music (iPad) — The workout timer on the left and your own music on the right: a split-screen gym screen made for iPad, with full screen.

Using an AI agent or writing a script? Most of these tools are also a free JSON API that an agent can call to check its work or look something up — GST, ABNs, DNS, email setup, dates, units, encodings and more. Read the API guide or fetch the list of endpoints.

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