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BMI Calculator
Calculate body mass index with metric or imperial units and adult screening ranges.
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Featured
Text Inspector
Count words, characters, sentences and lines, with an estimated reading time.
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Word Counter
Count words, unique words, sentences, paragraphs, and estimated reading time.
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BMR Calculator
Estimate basal metabolic rate with the Mifflin–St Jeor equation.
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Daily Calorie Calculator
Estimate maintenance calories from BMR and an activity multiplier.
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Loan Calculator
Calculate fixed loan payments, total interest and a full amortization schedule.
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Meta Tag Generator
Generate title, description, canonical, robots, Open Graph, and Twitter tags.
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EMI Calculator
Calculate equal monthly instalments and repayment schedule.
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Mortgage Calculator
Estimate mortgage payment, interest and loan-to-value ratio.
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Length Converter
Convert Length units through documented base factors and special conversion formulas.
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Line Numberer
Add sequential numbers to each line while optionally preserving blank lines.
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Markup Calculator
Calculate markup amount and markup percentage from cost and selling price.
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UTM Campaign URL Builder
Build an encoded campaign URL with standard UTM parameters.
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XML Formatter
Validate and indent an XML document without loading network entities.
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Area Converter
Convert Area units through documented base factors and special conversion formulas.
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Break-even Calculator
Calculate break-even units and revenue from fixed and variable costs.
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Canonical Tag Generator
Generate an escaped canonical link element for an HTTP or HTTPS URL.
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Text Reverser
Reverse Unicode text character by character without corrupting multibyte text.
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XML Validator
Check whether XML is well formed and identify its root element.
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CSV to JSON
Convert bounded CSV rows to JSON using optional headers and selectable delimiters.
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Hreflang Tag Generator
Generate alternate-language link elements from language and URL pairs.
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ROI Calculator
Calculate net return and return on investment percentage.
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Volume Converter
Convert Volume units through documented base factors and special conversion formulas.
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Word Order Reverser
Reverse the order of words while keeping each word intact.
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Arithmetic Mean
Calculate the arithmetic average of a numeric list.
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Business Days Between Dates
Count weekdays between two dates while excluding optional holiday dates.
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Gross Margin Calculator
Calculate gross profit and gross margin from revenue and cost of goods.
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Random Integer Generator
Generate one or more cryptographically secure integers in a bounded range.
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Safe YAML to JSON
Convert a documented flat YAML subset with simple lists into JSON.
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Sentence Counter
Count sentence-like units using bounded punctuation-aware segmentation.
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URL Parser
Break a URL into scheme, host, port, path, query and fragment components.
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Add or Subtract Days
Add positive or negative calendar days to a date and time.
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JSON to Safe YAML
Convert a flat JSON object and simple lists into a conservative YAML subset.
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Median Calculator
Calculate the middle value of an ordered numeric list.
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Net Profit Margin
Calculate net profit margin from revenue and net income.
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Paragraph Counter
Count paragraphs separated by one or more blank lines.
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Random Decimal Generator
Generate decimals in a range with selectable precision.
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URL Normalizer
Normalize scheme, hostname, path segments, default ports and optional fragments.
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Add or Subtract Months
Add positive or negative months with end-of-month adjustment.
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Domain Extractor
Extract and describe the hostname from a URL or hostname input.
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Mode Calculator
Find the most frequent value or values in a numeric list.
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Operating Margin
Calculate operating income as a percentage of revenue.
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Random Boolean Generator
Generate true or false values with a configurable true probability.
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TSV to JSON
Convert tab-separated rows to JSON with optional header mapping.
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Whitespace Normalizer
Normalize spaces, tabs and line breaks while optionally preserving paragraphs.
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Color Contrast Ratio
Calculate WCAG-style contrast ratio between two HEX colors.
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GPA Calculator
Calculate a credit-weighted grade point average on a selected scale.
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Hashtag Formatter
Normalize hashtag text, remove duplicates and format inline or by line.
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CGPA Calculator
Calculate a credit-weighted cumulative GPA from semester GPAs.
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Hashtag Counter
Count total and unique hashtags in social copy.
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WCAG Contrast Checker
Check AA and AAA contrast thresholds for normal and large text.
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Grade Percentage Calculator
Convert obtained marks and total marks into a percentage.
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Relative Luminance Calculator
Calculate relative luminance for a HEX color.
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Social Username Validator
Check username syntax for selected platforms without checking availability.
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Code 39 Barcode Generator
Generate a copy-ready Code 39 barcode as standards-based SVG for supported uppercase text.
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Email Validator
Check email address syntax, normalize the domain and explain the limits of offline mailbox validation.
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Fraction Calculator
Add, subtract, multiply or divide two fractions and return simplified, decimal and mixed-number forms.
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Markdown to HTML
Convert common Markdown headings, lists, links, emphasis, code and quotations into safe HTML markup.
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HTML to Markdown
Convert common semantic HTML elements into clean Markdown without executing scripts or remote content.
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Markdown Link Generator
Generate a correctly escaped Markdown link with optional title text.
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