Free calculators and tools for finance, SEO and marketing, development and design, writing, AI and everyday maths. Everything runs in your browser: your numbers and text are never uploaded.
EMI CalculatorMonthly loan instalment with a year-by-year breakdown.Trending SIP CalculatorEstimate the future value of monthly investments, with optional yearly step-up.Trending Compound Interest CalculatorSee how a lump sum grows with yearly, quarterly, monthly or daily compounding. GST CalculatorAdd or remove GST and see the CGST/SGST split.Trending Percentage CalculatorPercent of a number, “what percent is X of Y” and percent change. Discount CalculatorFinal price after one or two discounts, and how much you save. Age CalculatorExact age in years, months and days, plus days to the next birthday. BMI CalculatorBody mass index in metric or imperial units, with the healthy weight range. Ad Metrics Calculator (CTR, CPC, ROAS)CTR, CPC, CPM, CPA, conversion rate, ROAS and ROI from your campaign numbers.Trending UTM Link BuilderAdd campaign tracking parameters to any URL, correctly encoded. Meta Tag GeneratorTitle, description, robots, Open Graph and X card tags with live length counters.Trending URL Slug GeneratorTurn any title into a clean, SEO-friendly URL slug. Word & Character CounterWords, characters, sentences, reading time and top keywords.Trending Case ConverterUPPER, lower, Title, Sentence, camelCase, snake_case and kebab-case. Lorem Ipsum GeneratorPlaceholder paragraphs, sentences or words for mock-ups. JSON Formatter & ValidatorPretty-print, minify and validate JSON with clear error messages.Trending Base64 Encoder & DecoderEncode or decode text to Base64, with Unicode and URL-safe support. Color Converter & Contrast CheckerHEX ↔ RGB ↔ HSL with WCAG contrast ratios against white and black. CSS Gradient GeneratorLinear and radial gradients with live preview and copy-ready CSS.Trending Strong Password GeneratorRandom passwords made in your browser with a strength estimate. AI API Cost CalculatorEstimate per-request, daily and monthly LLM API cost from token counts and prices.Trending AI Prompt BuilderAssemble a clear, structured prompt: role, task, context, format and constraints.Trending Unit ConverterLength, weight, temperature, area, volume, speed and data size.
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