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BMI Calculator
Calculate body mass index with metric or imperial units and adult screening ranges.
Popular tools for everyday work
Discover featured and frequently selected online tools for writing, documents, development, data, images, SEO and everyday productivity.
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Start with trusted, useful tools.
These featured tools cover common writing, data, document, image, business and development tasks.
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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Password Strength Checker
Estimate password strength from length, character diversity and common weak patterns without storing the password.
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Quadratic Equation Solver
Solve ax² + bx + c = 0, including real or complex roots, discriminant and vertex.
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HTML Table Generator
Generate accessible HTML table markup from comma-separated headers and rows.
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MAC Address Validator
Validate and normalize common MAC address formats and identify unicast or multicast administration flags.
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Markdown Table Generator
Build a copy-ready Markdown table from comma-separated headers and rows.
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Pythagorean Theorem Calculator
Solve one missing side of a right triangle and show the squared-value verification.
Featured
m/s² to cm/s² Converter
Convert m/s² to cm/s² using a documented acceleration conversion factor.
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m/s² to mph/s Converter
Convert m/s² to mph/s using a documented acceleration conversion factor.
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cm/s² to km/h/s Converter
Convert cm/s² to km/h/s using a documented acceleration conversion factor.
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mm/s² to Gal Converter
Convert mm/s² to Gal using a documented acceleration conversion factor.
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ft/s² to standard gravity Converter
Convert ft/s² to standard gravity using a documented acceleration conversion factor.
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in/s² to ft/s² Converter
Convert in/s² to ft/s² using a documented acceleration conversion factor.
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standard gravity to mm/s² Converter
Convert standard gravity to mm/s² using a documented acceleration conversion factor.
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Gal to cm/s² Converter
Convert Gal to cm/s² using a documented acceleration conversion factor.
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km/h/s to m/s² Converter
Convert km/h/s to m/s² using a documented acceleration conversion factor.
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mph/s to m/s² Converter
Convert mph/s to m/s² using a documented acceleration conversion factor.
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mph/s to km/h/s Converter
Convert mph/s to km/h/s using a documented acceleration conversion factor.
Featured
m/s² to km/h/s Converter
Convert m/s² to km/h/s using a documented acceleration conversion factor.
Free tool
Character Counter
Measure characters with and without whitespace, letters, digits, and lines.
Free tool
JSON Formatter
Validate JSON and format it with readable indentation.
Free tool
Case Converter
Convert text to uppercase, lowercase, title case, sentence case, or toggled case.
Free tool
Percentage Calculator
Calculate a percentage of a number, percentage share, or percentage change.
Free tool
Body Fat Calculator
Estimate body-fat percentage with the U.S. Navy circumference method.
Free tool
Text Cleaner
Normalize line endings, repeated spaces, blank lines, and optional HTML markup.
Free tool
Duplicate Line Remover
Remove repeated lines while preserving the first occurrence and original order.
Free tool
Ideal Weight Calculator
Calculate a broad ideal-weight planning estimate using the Devine formula.
Free tool
Text Sorter
Sort text lines alphabetically, naturally, or by length in either direction.
Free tool
Water Intake Calculator
Estimate daily fluid intake from body weight, exercise time and climate.
Free tool
JSON Validator
Validate JSON syntax and report type, size, item count, and nesting depth.
Free tool
Protein Intake Calculator
Estimate a daily protein range from body weight and activity goal.
Free tool
Base64 Encoder and Decoder
Encode UTF-8 text to Base64 or strictly decode Base64 back to text.
Free tool
Waist-to-Height Ratio
Calculate waist circumference divided by height with screening descriptions.
Free tool
Pregnancy Due Date Calculator
Estimate a due date from the last menstrual period or conception date.
Free tool
URL Encoder and Decoder
Encode or decode URL components and query-string values.
Free tool
Hash Generator
Generate SHA-2, SHA-3, SHA-1, MD5, or HMAC digests from text.
Free tool
Ovulation Calculator
Estimate ovulation, fertile window and next period from cycle dates.
Free tool
Heart Rate Zones Calculator
Estimate five exercise zones with the Karvonen heart-rate-reserve method.
Free tool
UUID Generator
Generate one to one hundred cryptographically random RFC 4122 version 4 UUIDs.
Free tool
Slug Generator
Create a lowercase, transliterated, length-limited URL slug.
Free tool
Robots.txt Generator
Build a conservative robots.txt file with allow, disallow, crawl-delay, and sitemap directives.
Clear navigation with useful supporting content.
Search friendlyUnique titles, descriptions, canonicals and structured lists support future indexing.
Human focusedEvery page explains what visitors can find and how to continue.
Connected journeysInternal links connect categories, tools, guides and private workspace features.