All Online Tools & Calculators
Browse Zovli's complete catalog of 25 fast, secure, and free online calculators, unit converters, text utilities, and developer tools.
Age Calculator
Calculate your exact age in years, months, days, hours, and minutes from your date of birth.
Percentage Calculator
Solve percentage problems, calculate percentage increase/decrease, and find values effortlessly.
BMI Calculator
Calculate Body Mass Index (BMI) for adults with Metric and Imperial unit support and healthy weight insights.
EMI Calculator
Calculate Equated Monthly Installments (EMI) for home loans, car loans, and personal loans with interest breakdowns.
Discount Calculator
Calculate markdown savings, final sale price, stacked discounts, and applicable sales tax in seconds.
GST Calculator
Calculate Goods and Services Tax (GST / VAT) amounts with inclusive and exclusive tax modes and rate presets.
Simple Interest Calculator
Calculate simple interest, total repayment value, and annual yields for loans and fixed deposits.
Compound Interest Calculator
Calculate compound interest growth, final balance, and interest earnings across compounding frequencies.
Length Converter
Convert between millimeters, centimeters, meters, kilometers, inches, feet, yards, and miles.
Weight Converter
Convert mass between milligrams, grams, kilograms, metric tons, ounces, pounds, and stones.
Temperature Converter
Convert temperatures between Celsius (°C), Fahrenheit (°F), and Kelvin (K) with instant formula steps.
Area Converter
Convert land and surface area between square meters, square feet, acres, hectares, and square kilometers.
Data Storage Converter
Convert digital storage units between Bits, Bytes, KB, MB, GB, TB, and PB in Decimal and Binary standards.
Time Converter
Convert time durations between milliseconds, seconds, minutes, hours, days, weeks, months, and years.
Word Counter
Count words, characters, sentences, paragraphs, and estimate reading and speaking time in real time.
Character Counter
Count exact characters, letters, spaces, lines, and check social media character limits.
Case Converter
Convert text case to UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case, and kebab-case.
Duplicate Line Remover
Remove duplicate lines from lists, data sets, and text files while preserving original order.
Text Sorter
Sort lines of text alphabetically (A-Z, Z-A), numerically, by line length, or reverse order.
JSON Formatter
Format, beautify, indent, and minify JSON data with syntax highlighting, validation, and file export.
JSON Validator
Validate JSON syntax, detect exact error line and column numbers, and debug malformed JSON.
Base64 Encoder
Encode plain text, strings, and UTF-8 data into Base64 format with URL-safe encoding support.
Base64 Decoder
Decode Base64 encoded strings back into readable plain text and UTF-8 strings.
UUID Generator
Generate cryptographically secure Version 4 UUIDs (Universally Unique Identifiers) in bulk.
URL Encoder / Decoder
Encode and decode URLs, query parameters, and special characters with percent-encoding.
High-Search Tools & Keywords Directory
Quick access keyword backlinks to top online calculators and client-side utilities.