Free Online Tools for Everyday Tasks

Remove duplicate lines from lists, data files, and logs with case-sensitive and trimming options.

Calculate your Body Mass Index (BMI) and discover your healthy weight category.

Convert between Bytes, Kilobytes (KB), Megabytes (MB), Gigabytes (GB), Terabytes (TB), and Petabytes.

Scale and format your photo to standard official passport dimensions (2x2 inches / 600x600 px or 3.5x4.5 cm).

Check exact pixel dimensions, megapixel count, file size, aspect ratio, and print size at 300 DPI.

Generate complete HTML meta tags, Open Graph, and Twitter Card headers for web pages.

Convert between Indian numbering (Lakhs, Crores) and international systems (Millions, Billions).

Calculate daily study hours required to finish exam syllabus based on remaining days and chapter difficulty.

Calculate exact vehicle mileage (km per liter) from tank fill-up and odometer readings.

Find the exact number of days, weeks, months, and years between any two calendar dates.

Transform article titles and strings into clean, hyphenated URL slugs for SEO.

Encode plain text to Base64 strings or decode Base64 data back to readable UTF-8 text.

Validate JSON strings and identify syntax errors, missing brackets, or bad quotes.

Encode URLs and query parameters to percent-encoded format or decode encoded URLs back to human text.

Pretty-print, format, validate, and minify JSON data with instant syntax error detection and line numbers.

Calculate mean (average), median, mode, range, minimum, maximum, and sum from any set of numbers.

Calculate your recommended daily water consumption in liters and glasses based on weight and exercise.

Convert between Kilograms, Grams, Milligrams, Pounds (lbs), Ounces (oz), and Metric Tons.

Calculate GST inclusive and exclusive amounts for 5%, 12%, 18%, and 28% rates with CGST, SGST, and IGST breakdown.

Remove GST from any inclusive total to discover the exact original pre-tax value and tax portion.

Extract the original base price and tax breakdown from any gross GST-inclusive amount.

Add GST tax to any pre-tax base value and compute the gross invoice total with CGST and SGST splits.

Calculate Central Goods and Services Tax (CGST) for intra-state commercial transactions.

Calculate State Goods and Services Tax (SGST / UTGST) for intra-state transactions in India.

Calculate Integrated Goods and Services Tax (IGST) for interstate trade and imports into India.

Create and calculate multi-item commercial GST invoices with line-item discounts, tax slabs, and print ready totals.

Test multichannel surround sound audio channels (FL, C, FR, RL, RR, LFE) to verify home theater and surround headphone configurations.

Safe, expert step-by-step troubleshooting guide for muffled, quiet, crackling, or water-damaged phone speakers on iPhone and Android.

Test your mobile device's internal physical vibration motor and haptic feedback engine with pulse, heartbeat, and SOS patterns using the Web Vibration API.

Test your smartphone's front earpiece call speaker and follow safe troubleshooting steps to fix low in-call volume or muffled voices.

Comprehensive headphone test tool. Check left/right channel separation, bass response, high frequencies, and wiring polarity.

Test left and right stereo audio separation for phone speakers, desktop monitors, and sound systems with live visual channel meters.