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Calculate, convert documents, format code, and play quick puzzles without accounts or installs. Most Mindcrew tools run privately in your browser.
Every Mindcrew tool, grouped by what it's for. Hover an app for a quick look.
A fuller guide to the tools shown above, grouped the same way as the app directory.
Salary Tools brings together UK, US, and KSA take-home pay, UK pension salary sacrifice, and UK student-loan repayment on one page with a jump-to index and a colour-coded section per calculator. It is designed for job comparisons, pay-rise decisions, and household budgeting, where headline salary is less useful than the money that actually arrives after tax, payroll deductions, and (for KSA) GOSI.
Open Salary ToolsMortgage is for estimating the long-term shape of a home loan. It helps users explore repayment size, interest cost, and affordability before committing to a lender's calculator or application flow. Its purpose is not financial advice, but a transparent way to understand how term, rate, and loan size interact.
Open MortgageIslamic Mortgage compares Diminishing Musharaka, Murabaha, and Ijarah home finance structures. It is for checking payment visibility: provider-funded amount, acquisition, rent or profit, fees, equity growth, reset effects, and payoff timing. Its purpose is not a Sharia ruling or finance recommendation, but a clear way to review provider illustrations before speaking with an adviser.
Open Islamic MortgageOverpayment focuses on the specific question of what happens when extra money is paid into a mortgage. It is built to show how regular or one-off overpayments can change interest paid and time remaining, making it useful for comparing debt reduction against savings or other financial priorities.
Open OverpaymentLoan is for ordinary borrowing scenarios: personal loans, car finance, and other fixed-payment debts. It helps estimate repayments and total interest so users can compare term lengths, rates, and borrowed amounts with a clearer sense of the commitment each option creates.
Open LoanSavings is for projecting how deposits, interest rates, and time affect a balance. It is useful for emergency funds, short-term targets, and longer saving plans because it turns a vague goal into a set of numbers that can be adjusted and compared.
Open SavingsCurrency is for quick exchange-rate checks when prices, invoices, travel costs, or online purchases are listed in another currency. Its purpose is to give a practical converted value quickly, so users can judge the real cost without leaving the flow of what they were doing.
Open CurrencyStandard is the fast, general-purpose calculator for everyday arithmetic. It is the place for quick totals, percentages, ratios, and simple checks when opening a full spreadsheet would be too much overhead. The purpose is speed: a clean browser calculator that is ready whenever a number needs confirming.
Open StandardScientific is for the math that sits beyond basic arithmetic: powers, roots, logarithms, trigonometry, and the functions commonly needed in science, technical courses, and engineering prep. Its purpose is to give students, builders, and technically minded users a focused calculator without account friction or installed software.
Open ScientificEngineering is tuned for practical technical calculation, where values often move through powers of ten, constants, and units that need to be handled carefully. It is meant for bench work, design checks, and technical problem solving where the shape of the number matters as much as the final answer.
Open EngineeringUnit Converter is for translating measurements between systems without breaking concentration. It supports the everyday conversions that come up in recipes, travel, science, engineering, and online references, and its purpose is to make unfamiliar units immediately useful by putting equivalent values side by side.
Open Unit ConverterCircuit Tools is a small electronics workbench for common design calculations. It covers practical circuit relationships such as Ohm's Law, dividers, LEDs, timing circuits, and PCB trace sizing, with the purpose of helping makers and engineers move from a target behavior to sensible component values.
Open Circuit Tools15Square is a sliding-tile puzzle for quick, contained play. It keeps the classic rearrangement challenge simple and immediate, while supporting different board sizes, touch controls, saved local progress, and local best scores. Its purpose is a calm browser puzzle that works well in short sessions.
Open 15SquareZoomDefence is an arcade defense game built around quick reactions, rescues, and escalating pressure. It draws on the feel of classic side-scrolling defense shooters, with local scoring and immediate browser play. Its purpose is short-form action: clear objectives, fast restarts, and no account setup.
Open ZoomDefenceNeonAttack is a cyber-styled arcade defense game with waves, shields, powerups, boss encounters, touch controls, and local high scores. It is meant for players who want a more layered quick-play shooter, where survival depends on managing threats, timing defensive tools, and improving across runs.
Open NeonAttackWyrmling adapts the familiar grow-and-survive structure of classic snake into a themed arcade challenge. The purpose is simple: collect, grow, avoid trapping yourself, and push for a better local score. It gives the old rule set a more characterful browser-game wrapper while keeping the controls approachable.
Open Wyrmlingmazeattack is a maze-chase arcade game about routing, timing, and risk. The player navigates a compact garden maze, collects resources, and avoids roaming guardians. Its purpose is to provide a fast, readable chase game that works on desktop and touch screens without needing a download.
Open mazeattackmushrooms is a macro-garden arcade shooter with segmented enemies, obstacles, touch controls, and local high scores. It is built for quick sessions where positioning matters: clearing threats, reacting to changing paths, and surviving long enough to beat a previous run.
Open mushroomsShapeshift is a modern falling-block stacker with a fungal theme: familiar stacking rules, shapeshifting pieces, a hold/next queue, and combo chains. Unlike its Leisure siblings it keeps an online leaderboard and a daily seed challenge, so runs can be compared against other players, not just a local best score.
Open Shapeshiftmd2doc converts Markdown into a Word document and is the default view of mdformatter's single configurable converter. Every icon in this row opens the same tool — PDF, HTML, ChatGPT/AI Markdown, LaTeX equations, legal-style DOCX, and academic DOCX are export/input options within it, not separate destinations.
Open md2docmd2pdf turns Markdown into a PDF for situations where the final layout should be fixed and easy to send. It is useful for reports, instructions, briefs, and generated drafts that need to leave the browser as a stable document rather than editable source text.
Open md2pdfmd2html converts Markdown into HTML so writing can move directly into web pages, CMS fields, documentation systems, or email templates. Its purpose is to bridge a lightweight writing format and the markup needed for publishing without forcing the user to hand-code every tag.
Open md2htmlgpt2doc is aimed at turning AI-generated Markdown into a cleaner Word document. ChatGPT and similar tools often produce structured text with headings, lists, and tables; this converter's purpose is to preserve that structure and make the output easier to edit, file, or share.
Open gpt2doctex2eq helps move LaTeX equation content into Word-friendly form. It exists for users who draft math in a notation-first environment but need to submit or share work in a Word document, where equations must be readable and usable by non-LaTeX tooling.
Open tex2eqlegal2doc is for Markdown documents that need a more formal legal-document shape. It supports the workflow of drafting in plain text while producing a Word file better suited to clauses, headings, numbering, and review. Its purpose is practical document preparation, not legal advice.
Open legal2docacad2doc is for academic-style Markdown drafts that need to become Word documents. It is useful for essays, papers, notes, and research writeups where headings, citations, lists, and equations may need to survive the trip into DOCX for review or submission.
Open acad2docJSON formats structured data so it can be read, inspected, and debugged. It is useful when an API response, config blob, or copied payload arrives as a single dense line. The purpose is to reveal structure, spot syntax problems, and make data easier to compare.
Open JSONJavaScript tidies browser and Node code into a more readable shape. It is useful for pasted snippets, minified fragments, or inconsistent indentation, and its purpose is to make logic easier to review before editing, debugging, or sharing with another developer.
Open JavaScriptTypeScript formats typed JavaScript code while preserving the language constructs developers rely on for interfaces, generics, annotations, and modern syntax. Its purpose is to make copied or messy TypeScript easier to reason about before it goes back into an editor or review.
Open TypeScriptCSS formats style rules so selectors, declarations, and nested-looking blocks are easier to scan. It is useful when debugging copied styles, comparing generated CSS, or cleaning a stylesheet before making changes. The purpose is readability without turning formatting into a project setup task.
Open CSSYAML formats indentation-sensitive configuration files, where a small visual mistake can change meaning. It is useful for CI files, app configs, and infrastructure snippets. The purpose is to make hierarchy clear enough that errors are easier to catch before the file is used.
Open YAMLC formats source code for a compact, brace-heavy language where readability depends on consistent indentation and spacing. It helps with copied examples, legacy snippets, and quick review, with the purpose of making control flow and block structure easier to follow.
Open CC++ formats code that can otherwise become visually dense very quickly: templates, namespaces, classes, lambdas, and nested blocks all benefit from consistent layout. Its purpose is to make C++ snippets easier to inspect, discuss, and prepare for editing.
Open C++VBScript formats older automation and scripting code so its conditionals, loops, and procedures are clearer. It is useful for maintaining legacy scripts, copied admin snippets, or archived code where tooling is less common. The purpose is to make old-but-still-used code less opaque.
Open VBScriptDirect routes to the calculators, converters, formatters, games, and pricing checks people use most.
Mindcrew Tools is built around small, focused tools that stay free through display advertising instead of accounts, subscriptions, or paywalls.
Every tool opens directly, without signup gates or saved-user workflows.
Most tools run locally in your browser, so routine work stays on your device.
Display advertising keeps the tools free without hiding core features behind plans.
Calculators, exports, games, and formatters are updated as the suite grows.