Free tools for makers
Browser-based utilities that solve real problems. No accounts, no paywalls, no nonsense.
US Supplement Facts Panel Generator
Create FDA-compliant supplement facts panels from a simple markdown description. Preview in real time and download as PNG or vector SVG.
Open tool DocumentsMarkdown to PDF Converter
Paste or load any .md file, preview it as a styled document, and download as a PDF. Supports tables, headings, bold/italic and all standard markdown.
Open tool CalculatorPercentage Calculator
Find X% of Y, what percent X is of Y, percentage change, and convert between markup and margin. Instant results as you type.
Open tool CalculatorAge Calculator
Calculate your exact age in years, months, and days. See your generation, zodiac signs, planet ages, and fun milestones.
Open tool CalculatorDiscount Calculator
Calculate sale prices with single discounts, stacked discounts, or fixed amounts off. See how much you save instantly.
Open tool CalculatorTip Calculator
Calculate tips and split bills with friends. Quick-tap percentage buttons, pre-tax option, and round-up feature. Mobile-friendly.
Open tool CalculatorDate Calculator
Find days between dates, add or subtract days, and calculate business days. Shows breakdown in years, months, weeks, and days.
Open tool CalculatorBill Split Calculator
Split bills equally or with custom amounts per person. Add tip, round up, and copy per-person totals to share.
Open tool FinanceROI Calculator
Calculate return on investment and annualized returns (CAGR). Compare two investments side by side with visual charts.
Open tool ReferenceISO Country Codes
Search ISO 3166 country names and alpha-2 / alpha-3 codes as you type. Click any code to copy it — handy when you know the country but not the abbreviation.
Open tool DeveloperJSON Formatter & Validator
Beautify, minify, and validate JSON with syntax highlighting. Tree view, keyboard shortcuts, and drag-and-drop support.
Open tool TextWord Counter
Count words, characters, sentences, and paragraphs. Includes keyword density analysis and reading time estimates. Updates live as you type.
Open tool FinanceCurrency Converter
Convert between 35+ world currencies. Approximate mid-market rates. Fast, free, works offline once loaded.
Open tool DeveloperRegex Tester
Test regular expressions with live match highlighting. View capture groups and test replacements. JavaScript regex flavor.
Open tool FinanceCompound Interest Calculator
See how investments grow with compound interest. Year-by-year breakdown, growth chart, and monthly contribution tracking.
Open tool FinanceMortgage Calculator
Calculate monthly payments, total interest, and view full amortization schedule. Add extra payments to see interest savings.
Open tool GeneratorQR Code Generator
Generate QR codes from URLs or text. Customize colors and download as PNG or SVG. All generation happens in your browser.
Open tool ImageImage Compressor
Compress JPEG, PNG, and WebP images in your browser. Adjust quality, see live preview. No uploads — everything stays local.
Open tool SecurityPassword Generator
Generate strong, secure passwords and passphrases. Client-side only — nothing leaves your browser.
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