Tools Directory

AIDigitalStuff started as a small collection of calculators and has grown into a directory of free, browser-based tools spanning finance, conversions, productivity, and casual gaming. Every tool on this page runs directly in your browser tab — there's no account to create, no app to install, and no credit card to enter. We built the directory this way because most day-to-day tasks, from working out a mortgage repayment to picking a random raffle winner, shouldn't require handing over an email address or waiting for a download. Whether you're a small business owner pricing a product, a first-home buyer trying to understand stamp duty concessions, or someone hosting a giveaway for their community, you'll find a purpose-built tool here rather than a generic multi-purpose app trying to do everything at once. The sections below walk through what each category is for and who tends to get the most use out of it, so you can find the right tool without having to click through every card above.

Calculators & Financial Planning Tools

Our calculator suite is aimed at real financial decisions rather than back-of-envelope guesswork. The Smart Calculators hub covers mortgage repayments, loan comparisons, and investment growth projections with detailed breakdowns instead of a single output number. The Markup Calculator is built for retailers and freelancers who need to move quickly between cost, markup percentage, and profit margin — a distinction that trips up a lot of people pricing products for the first time. Property investors can lean on the Cap Rate Analyzer to work out net operating income, cap rate, and gross rent multiplier for up to three deals side by side, complete with a live risk rating as figures are entered. For anyone buying their first property in Australia, the First Home Buyer Calculator walks through borrowing capacity, deposit and LMI estimates, and state-based grants and stamp duty concessions in one place. Rounding out the health side, the TDEE Calculator estimates total daily energy expenditure, BMR, and macro targets using both the Mifflin-St Jeor and Harris-Benedict formulas, with metric and imperial support for men and women.

Converters, Generators & File Tools

Unit and format conversion is one of the most common reasons people land on AIDigitalStuff, so we've tried to cover the formats people actually need. The Currency Converter pulls live exchange rate data so you're not working off numbers from last week. The Digital Converter handles everyday file, unit, and data-type conversions without needing separate desktop software. Anyone who's ever guessed wrong on an overseas clothing order will get more use out of the Clothes Size Converter, which maps clothing, denim, shoe, and kids' sizing across the US, UK, Australia, Europe, and Japan, along with fit guides for waist, bra, denim, and footwear measurements. The QR Code Generator turns URLs, plain text, or WiFi credentials into a scannable code you can download as a PNG or SVG in seconds — handy for printed menus, business cards, or event signage. And because large attachments are still an everyday annoyance, the Files Compressor shrinks images, PDFs, videos, and zip archives right in your browser, so nothing you upload has to leave your device to get processed.

Productivity, Prize Draws & Games

Not everything here is a spreadsheet replacement. Daily Tasks is a lightweight to-do list you can install to your home screen and use offline, built for people who want something that starts up instantly rather than a project-management tool with a learning curve. LuxeWheel is our customizable prize wheel, used by community organisers, streamers, and teachers for giveaways, raffles, and random name selection — just add your entries and spin. When it's time for a break, Retro Games offers a set of classic arcade-style titles you can play directly in the browser, with a Leaderboard tracking top scores across the collection so you can see how you stack up.

Why We Built It This Way

Every calculator and converter on this site processes your input locally in the browser wherever the task allows — nothing you type is stored on our servers, and there's no sign-up wall between you and the result. We keep the tools free because the site is supported by standard display advertising rather than subscriptions or paywalled features. That trade-off lets us keep adding new tools based on what visitors are actually searching for, rather than gating functionality behind a pricing tier. It also means each tool tends to stay narrow and fast rather than turning into a bloated all-in-one dashboard — the Markup Calculator does one job well instead of trying to also be an invoicing platform, and the QR Code Generator focuses on generating clean, scannable codes instead of bundling in analytics you'd have to pay to unlock. If there's a calculator or converter you'd like to see added to the directory, the Contact Us page in the site footer is the fastest way to reach us, and it's genuinely how several of the newer tools above — including the Cap Rate Analyzer and the First Home Buyer Calculator — came to exist in the first place.

Frequently Asked Questions