Guides, tutorials, and tips for using our tools.
Calculate trip fuel cost from distance, fuel efficiency, and fuel price.
Read article →Estimate body fat percentage using the US Navy measurement method.
Estimate due date from last menstrual period using Naegeles rule.
Calculate exact days, weeks, and months between two dates.
Add or remove GST/VAT at any configurable rate.
Calculate tip amount and split the bill between multiple people.
Generate v4 UUIDs with bulk generation support up to 100 at once.
Calculate cumulative GPA from course grades and credit hours.
Convert text to spoken audio using browser speech synthesis.
Remove extra spaces, tabs, and blank lines from any text.
Convert between CSS units: px, em, rem, percent, vw, and vh.
Calculate daily calorie needs based on age, weight, height, and activity level.
Calculate Body Mass Index and find your healthy weight range.
Convert colors between HEX, RGB, and HSL formats with color picker.
Convert Markdown text to clean HTML with live preview.
Validate JSON-LD structured data for errors and best practices.
Calculate exact age from birth date in years, months, and days.
Convert XML documents to JSON format instantly.
Count sentences, average words per sentence, and readability score.
Live preview Markdown as formatted HTML side by side.
Parse cron expressions into human-readable schedules.
Estimate YouTube ad revenue from views, CPM, and engagement.
Compare two texts side by side and highlight all differences.
Analyze page speed factors and get optimization recommendations.
Count lines, non-empty lines, and average line length in any text.
Preview how your page appears on Facebook, Twitter, and LinkedIn.
Estimate your Google AdSense earnings based on traffic and CTR.
Decode and inspect JSON Web Tokens, view header and payload.
Test regular expressions with real-time matching and group highlighting.
Analyze word frequency and find the most used words in any text.
Convert between hourly, weekly, monthly, and annual salary.
Check HTTP status codes of any URL for SEO and uptime monitoring.
Calculate discounted prices and savings on any purchase.
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from any text.
Generate XML sitemaps from a list of URLs for search engine submission.
Generate Lorem Ipsum placeholder text for your designs and mockups.
Remove duplicate lines from text while preserving order.
Analyze keyword density to optimize your content for SEO.
Minify CSS code to reduce file size and speed up your website.
See how your money grows with compound interest over time.
Calculate percentages, percentage change, and percentage of a number.
Remove extra spaces, line breaks, and unwanted characters from text.
Generate FAQ structured data markup for rich snippets in search results.
Minify HTML code to reduce file size and improve load times.
Estimate how long it takes to read any text or article.
Encode and decode URLs and URI components.
Before you sign any loan agreement, you need to know exactly what you're paying each month and how much interest you'll pay over the life of the loan.
Generate a robots.txt file to control search engine crawling.
Encode and decode Base64 strings quickly and easily.
Convert any text into URL-friendly slugs instantly.
Find out when your business will break even with this simple calculator.
Convert text between uppercase, lowercase, title case, and more.
Count characters with and without spaces in real-time.
Validate JSON syntax and find errors instantly.
Determine gross, net, and operating profit margins instantly.
Create compelling meta descriptions that boost click-through rates.
Every business decision comes down to one question: is it worth the money? An ROI calculator answers that in seconds.
Generate optimized meta titles for better search engine rankings.
You'd be surprised how often word count matters.
Beautify and format JSON data with proper indentation.
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