BMI Calculator
Calculate body mass index with metric or imperial units and adult screening ranges.
Open tool →Useful tools, one secure runtime.
Every tool uses validated inputs, registered processors, bounded execution, usage controls and consistent results.
Text Inspector
Count words, characters, sentences and lines, with an estimated reading time.
Open tool →Word Counter
Count words, unique words, sentences, paragraphs, and estimated reading time.
Open tool →BMR Calculator
Estimate basal metabolic rate with the Mifflin–St Jeor equation.
Open tool →Daily Calorie Calculator
Estimate maintenance calories from BMR and an activity multiplier.
Open tool →Loan Calculator
Calculate fixed loan payments, total interest and a full amortization schedule.
Open tool →Meta Tag Generator
Generate title, description, canonical, robots, Open Graph, and Twitter tags.
Open tool →EMI Calculator
Calculate equal monthly instalments and repayment schedule.
Open tool →Mortgage Calculator
Estimate mortgage payment, interest and loan-to-value ratio.
Open tool →Image Compressor
Compress JPEG, PNG, or WebP images while enforcing dimension, memory, size, signature, and timeout limits.
Open tool →PDF Splitter
Split a PDF into individual page files or grouped page-range documents, delivered as one protected ZIP archive.
Open tool →Extract PDF Pages
Create a new PDF containing only selected pages while preserving the requested order.
Open tool →Images to PDF
Combine validated JPG, PNG and WebP images into one ordered PDF document.
Open tool →Compress PDF
Reduce PDF size using controlled Ghostscript quality profiles and report the measured size change.
Open tool →PDF Metadata Viewer
Inspect safe PDF document properties including title, author, dates, page count, encryption and PDF version.
Open tool →Length Converter
Convert Length units through documented base factors and special conversion formulas.
Open tool →Line Numberer
Add sequential numbers to each line while optionally preserving blank lines.
Open tool →Markup Calculator
Calculate markup amount and markup percentage from cost and selling price.
Open tool →UTM Campaign URL Builder
Build an encoded campaign URL with standard UTM parameters.
Open tool →XML Formatter
Validate and indent an XML document without loading network entities.
Open tool →Area Converter
Convert Area units through documented base factors and special conversion formulas.
Open tool →Break-even Calculator
Calculate break-even units and revenue from fixed and variable costs.
Open tool →Canonical Tag Generator
Generate an escaped canonical link element for an HTTP or HTTPS URL.
Open tool →Text Reverser
Reverse Unicode text character by character without corrupting multibyte text.
Open tool →XML Validator
Check whether XML is well formed and identify its root element.
Open tool →CSV to JSON
Convert bounded CSV rows to JSON using optional headers and selectable delimiters.
Open tool →Hreflang Tag Generator
Generate alternate-language link elements from language and URL pairs.
Open tool →ROI Calculator
Calculate net return and return on investment percentage.
Open tool →Volume Converter
Convert Volume units through documented base factors and special conversion formulas.
Open tool →Word Order Reverser
Reverse the order of words while keeping each word intact.
Open tool →Arithmetic Mean
Calculate the arithmetic average of a numeric list.
Open tool →Business Days Between Dates
Count weekdays between two dates while excluding optional holiday dates.
Open tool →Gross Margin Calculator
Calculate gross profit and gross margin from revenue and cost of goods.
Open tool →Random Integer Generator
Generate one or more cryptographically secure integers in a bounded range.
Open tool →Safe YAML to JSON
Convert a documented flat YAML subset with simple lists into JSON.
Open tool →Sentence Counter
Count sentence-like units using bounded punctuation-aware segmentation.
Open tool →URL Parser
Break a URL into scheme, host, port, path, query and fragment components.
Open tool →Add or Subtract Days
Add positive or negative calendar days to a date and time.
Open tool →JSON to Safe YAML
Convert a flat JSON object and simple lists into a conservative YAML subset.
Open tool →Median Calculator
Calculate the middle value of an ordered numeric list.
Open tool →Net Profit Margin
Calculate net profit margin from revenue and net income.
Open tool →Paragraph Counter
Count paragraphs separated by one or more blank lines.
Open tool →Random Decimal Generator
Generate decimals in a range with selectable precision.
Open tool →URL Normalizer
Normalize scheme, hostname, path segments, default ports and optional fragments.
Open tool →Add or Subtract Months
Add positive or negative months with end-of-month adjustment.
Open tool →Domain Extractor
Extract and describe the hostname from a URL or hostname input.
Open tool →Mode Calculator
Find the most frequent value or values in a numeric list.
Open tool →Operating Margin
Calculate operating income as a percentage of revenue.
Open tool →Random Boolean Generator
Generate true or false values with a configurable true probability.
Open tool →TSV to JSON
Convert tab-separated rows to JSON with optional header mapping.
Open tool →Whitespace Normalizer
Normalize spaces, tabs and line breaks while optionally preserving paragraphs.
Open tool →Color Contrast Ratio
Calculate WCAG-style contrast ratio between two HEX colors.
Open tool →GPA Calculator
Calculate a credit-weighted grade point average on a selected scale.
Open tool →Hashtag Formatter
Normalize hashtag text, remove duplicates and format inline or by line.
Open tool →CGPA Calculator
Calculate a credit-weighted cumulative GPA from semester GPAs.
Open tool →Hashtag Counter
Count total and unique hashtags in social copy.
Open tool →WCAG Contrast Checker
Check AA and AAA contrast thresholds for normal and large text.
Open tool →Grade Percentage Calculator
Convert obtained marks and total marks into a percentage.
Open tool →Relative Luminance Calculator
Calculate relative luminance for a HEX color.
Open tool →Social Username Validator
Check username syntax for selected platforms without checking availability.
Open tool →m/s² to cm/s² Converter
Convert m/s² to cm/s² using a documented acceleration conversion factor.
Open tool →m/s² to mph/s Converter
Convert m/s² to mph/s using a documented acceleration conversion factor.
Open tool →cm/s² to km/h/s Converter
Convert cm/s² to km/h/s using a documented acceleration conversion factor.
Open tool →mm/s² to Gal Converter
Convert mm/s² to Gal using a documented acceleration conversion factor.
Open tool →ft/s² to standard gravity Converter
Convert ft/s² to standard gravity using a documented acceleration conversion factor.
Open tool →in/s² to ft/s² Converter
Convert in/s² to ft/s² using a documented acceleration conversion factor.
Open tool →standard gravity to mm/s² Converter
Convert standard gravity to mm/s² using a documented acceleration conversion factor.
Open tool →Gal to cm/s² Converter
Convert Gal to cm/s² using a documented acceleration conversion factor.
Open tool →km/h/s to m/s² Converter
Convert km/h/s to m/s² using a documented acceleration conversion factor.
Open tool →mph/s to m/s² Converter
Convert mph/s to m/s² using a documented acceleration conversion factor.
Open tool →mph/s to km/h/s Converter
Convert mph/s to km/h/s using a documented acceleration conversion factor.
Open tool →m/s² to km/h/s Converter
Convert m/s² to km/h/s using a documented acceleration conversion factor.
Open tool →Character Counter
Measure characters with and without whitespace, letters, digits, and lines.
Open tool →JSON Formatter
Validate JSON and format it with readable indentation.
Open tool →Case Converter
Convert text to uppercase, lowercase, title case, sentence case, or toggled case.
Open tool →Percentage Calculator
Calculate a percentage of a number, percentage share, or percentage change.
Open tool →Body Fat Calculator
Estimate body-fat percentage with the U.S. Navy circumference method.
Open tool →Text Cleaner
Normalize line endings, repeated spaces, blank lines, and optional HTML markup.
Open tool →Duplicate Line Remover
Remove repeated lines while preserving the first occurrence and original order.
Open tool →Ideal Weight Calculator
Calculate a broad ideal-weight planning estimate using the Devine formula.
Open tool →Text Sorter
Sort text lines alphabetically, naturally, or by length in either direction.
Open tool →Water Intake Calculator
Estimate daily fluid intake from body weight, exercise time and climate.
Open tool →JSON Validator
Validate JSON syntax and report type, size, item count, and nesting depth.
Open tool →Protein Intake Calculator
Estimate a daily protein range from body weight and activity goal.
Open tool →Base64 Encoder and Decoder
Encode UTF-8 text to Base64 or strictly decode Base64 back to text.
Open tool →Waist-to-Height Ratio
Calculate waist circumference divided by height with screening descriptions.
Open tool →Pregnancy Due Date Calculator
Estimate a due date from the last menstrual period or conception date.
Open tool →URL Encoder and Decoder
Encode or decode URL components and query-string values.
Open tool →Hash Generator
Generate SHA-2, SHA-3, SHA-1, MD5, or HMAC digests from text.
Open tool →Ovulation Calculator
Estimate ovulation, fertile window and next period from cycle dates.
Open tool →Heart Rate Zones Calculator
Estimate five exercise zones with the Karvonen heart-rate-reserve method.
Open tool →UUID Generator
Generate one to one hundred cryptographically random RFC 4122 version 4 UUIDs.
Open tool →Slug Generator
Create a lowercase, transliterated, length-limited URL slug.
Open tool →Robots.txt Generator
Build a conservative robots.txt file with allow, disallow, crawl-delay, and sitemap directives.
Open tool →Compound Interest Calculator
Calculate future value and interest under selectable compounding frequency.
Open tool →Open Graph Preview
Preview how title, description, image, URL, site name, and type form a social card.
Open tool →Age Calculator
Calculate exact age, total elapsed days, and the next birthday from a birth date.
Open tool →Savings Calculator
Project an initial balance and monthly deposits with compound growth.
Open tool →Date Difference Calculator
Calculate calendar difference, total days, weeks, and weekday estimate between two dates.
Open tool →Investment Growth Calculator
Project investment growth from initial capital and monthly contributions.
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