Free Online Tools

Simple arithmetic — add, subtract, multiply, divide

Trigonometry, logarithms, powers and roots

Find X% of Y, percentage change and reverse percentages

Calculate Body Mass Index and health category

Exact age in years, months and days from birthdate

Calculate SI on any principal, rate and time

CI with monthly, quarterly or annual compounding

Monthly EMI for home loan, car loan or personal loan

Add or remove GST — 5%, 12%, 18%, 28%

Sale price and savings after any percentage discount

Tip amount and per-person split for any bill

Convert Celsius, Fahrenheit and Kelvin

Metre, feet, inch, cm, km, mile and more

kg, pounds, ounces, grams and tonnes

Major world currencies with reference rates

Exact days, weeks, months between two dates

Weighted final grade from assignments and exams

Daily calorie needs by age, weight and activity level

Return on Investment as percentage profit or loss

Gross and net profit margin from cost and revenue

Mean, median and mode of any number set

Add, subtract, multiply and divide fractions

Monthly to annual salary conversion and breakdown

Estimate fuel cost for any road trip

Recommended daily water intake by weight

Count words, characters, sentences and paragraphs

Characters with and without spaces — for Twitter/SMS

UPPER, lower, Title, camelCase, snake_case, kebab-case

Reverse characters, words or entire lines

Convert any text to a clean SEO-friendly URL slug

Remove duplicate lines from any list or text

Sort lines alphabetically, by length or randomly

Clean up whitespace, tabs and blank lines

Compare two texts and highlight differences

Find and replace any word or phrase in text

Stylish Unicode fonts for bios and captions

Strip all HTML tags and extract plain text

Convert text or numbers to binary and back

Format, beautify and validate JSON data

Encode or decode Base64 strings

Encode or decode URL query parameters

Cryptographically secure random passwords

Test how strong any password is

Generate UUID v4 (random) identifiers in bulk

Convert Unix timestamps to readable dates

Generate placeholder text for designs and mockups

Random integers or decimals in any range

Test regular expressions with live highlighting

Generate MD5 hash from any text input

Convert CSV data to JSON format instantly

Convert JSON arrays to CSV for spreadsheets

Beautify and indent raw HTML code

Random strings of any length and character set

Complete HTML meta tags for any web page

OG tags for better Facebook and social previews

Twitter Card meta tags for rich Twitter previews

JSON-LD Schema.org markup for any page type

Custom robots.txt file to control bot crawling

Preview your page as it appears in Google search

Canonical URL tags to avoid duplicate content

Basic XML sitemap structure for any website

Pick colors and get HEX, RGB and HSL values

QR code for any URL, text or contact info

Preview a simple favicon from initials or text

Calculate image dimensions maintaining aspect ratio

Relevant hashtags for Instagram, Twitter and LinkedIn

SEO-optimized tags for YouTube videos

Engaging captions for any social media post

Professional social media bio in seconds

Eye-catching LinkedIn profile headline