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Calculators

Free online calculators for everyday and professional use. Quickly work out BMI, percentages, loans, tips, age, compound interest, and more.

BMI Calculator
Calculate your BMI using metric or imperial units. Instantly check if you are underweight, normal, overweight, or obese.
Age Calculator
Enter your date of birth to calculate your exact age in years, months, and days. Quick, simple, and accurate.
Tip Calculator
Work out tips quickly and split bills between people. Enter amount, tip %, and people to see per-person cost.
UK VAT Calculator
Calculate UK VAT at 20%. Add VAT to a net price or remove VAT from a gross price instantly.
Loan Calculator
Calculate loan repayments, monthly interest, and amortization schedules. Useful for mortgages and personal loans.
Compound Interest
Calculate compound interest on savings or investments. Choose compounding frequency and growth duration.
Percentage Calculator
Calculate percentages easily. Find X% of Y, percentage increase or decrease, and reverse percentage problems.
Prime Number Checker
Enter a number to check if it’s prime using a fast trial-division test.
Percentage Difference
Calculate the absolute change and percent change from one value to another.
Factorial Calculator
Calculate the factorial of any integer n with large number support.
Prime Generator
Generate a list of the first N prime numbers instantly.
Number Base Calculator
Convert numbers between binary, octal, decimal, and hexadecimal instantly.

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Converters

Fast and simple conversion tools. Convert between file formats, text encodings, units, currencies, dates, and numbers like HEX, Base64, Morse code, and more.

HEX ⇄ RGB
Convert HEX to RGB and RGB to HEX with live preview. Useful for designers, developers, and anyone working with colors.
URL Encoder / Decoder
Safely encode or decode URLs to make them browser-friendly. Convert special characters and protect links from errors.
Base64 Encode / Decode
Convert text to Base64 and decode Base64 back to text. Perfect for developers, security, and encoding binary data.
Unit Converter
Convert between units of length, weight, temperature, and more. Simple online conversion calculator.
Time Zone Converter
Convert dates and times between different time zones instantly. Useful for meetings, travel, and global events.
HTML Entities
Encode or decode HTML entities quickly. Convert symbols, characters, and text for safe web use.
CSV → JSON
Convert CSV files to JSON arrays with options. Upload a file or paste data and get instant conversion.
JSON → CSV
Convert JSON arrays into CSV format. Upload or paste JSON and download ready-to-use CSV instantly.
Base Converter
Convert numbers between bases 2-36. Supports binary, octal, decimal, and hexadecimal formats.
Roman Numeral Converter
Convert numbers to Roman numerals and back instantly. Great for history, education, or formatting.
Morse Code Translator
Convert text to Morse and decode Morse back to text. Includes a simple audio beeper.
Temperature Converter
Convert between °C, °F and Kelvin instantly with synced fields.

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Generators

Random and creative generators for passwords, UUIDs, QR codes, barcodes, NanoIDs, Lorem Ipsum, numbers, dice rolls, and word clouds.

Password Generator
Generate strong, secure, random passwords instantly. Choose length, include numbers, symbols, uppercase and lowercase letters.
Hash Generator
Generate MD5, SHA-1, and SHA-256 hashes from text instantly. Secure one-way hashing tool for developers and IT pros.
UUID Generator
Generate v4 UUIDs instantly for free. Unique, random identifiers for software projects, databases, and development.
QR Code Generator
Create QR codes from text or URLs instantly. Download as an image and use for websites, business cards, and marketing.
Random Number
Generate random numbers between any two values instantly. Great for games, raffles, and quick number picking.
Lorem Ipsum Generator
Generate placeholder Lorem Ipsum text for designs, documents, and layouts. Choose number of paragraphs or sentences.
Barcode Generator
Generate Code128 barcodes instantly from text. Download barcode images for labels, packaging, or products.
NanoID Generator
Generate secure NanoIDs with customizable length and alphabet. Great for developers needing short unique IDs.
Dice Roller
Roll any number of dice with any number of sides. Shows individual rolls and totals.

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Text

Text utilities to format, clean, analyze, and transform text. Includes word counters, case converters, slug generators, diff checkers, and more.

Word Counter
Instantly count words, characters, sentences, paragraphs, and reading time. Perfect for essays, SEO, writers, and social posts.
Case Converter
Convert text between UPPERCASE, lowercase, Title Case, Sentence case, kebab-case, and snake_case instantly online.
JSON Formatter
Format, beautify, or minify JSON instantly. Detect errors in your JSON data with live validation and syntax highlighting.
Markdown → HTML
Convert Markdown to clean HTML instantly. Live preview, copy HTML, and check formatting. Perfect for blogs and documentation.
Text Diff
Compare two pieces of text and highlight differences. Great for developers, editors, and document comparison.
Slug Generator
Turn text into clean, SEO-friendly slugs for URLs. Supports kebab-case, lowercase, and safe URL formatting.
Sort Lines
Sort lines alphabetically A-Z or Z-A, remove duplicates, and trim whitespace. Simple online line sorting tool.
Remove Duplicate Lines
Strip duplicate lines from text and clean whitespace. Quick online tool to tidy lists and datasets.
Word Frequency
Paste text and see the most common words with frequency counts. Great for SEO, linguistics, and analysis.
Text Reverser
Reverse text by characters, words, or lines. Handy for puzzles and quick transformations.
Emoji Remover
Remove emojis and variation selectors from text with one click. Clean text for processing or publishing.
Palindrome Checker
Check if a word or phrase reads the same backwards. Ignores spaces and punctuation.

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Accessibility

Accessibility tools to test color contrast, simulate color blindness, and ensure your designs meet WCAG standards for inclusive, user-friendly websites.

Color Contrast Checker
Check color contrast ratios for accessibility. Ensure text and background combinations meet WCAG AA/AAA standards.
Color Blindness Simulator
Upload an image and preview how it looks for different color vision deficiencies.

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Banking

Free online banking and finance tools. Validate and generate IBANs, check SWIFT/BIC codes, verify credit card numbers, and explore financial utilities for international payments.

IBAN Validator / Generator
Validate IBANs with live checksum (MOD 97) and formatting. Generate checksum-valid sample IBANs by country, copy or format in groups of 4.
SWIFT Code Lookup
Check, validate, and parse SWIFT/BIC codes. Instantly see bank code, country, location, and branch information. Ensure codes follow ISO 9362 format for international payments.
Credit Card Validator
Validate credit card numbers instantly using the Luhn checksum. Detect card issuer (Visa, MasterCard, AMEX, Discover) and format in groups of 4 for readability.
Routing Number Checker
Validate US bank routing numbers (ABA numbers) instantly. Check digit length, verify checksum, and detect common errors.
IBAN Country Formats
Lookup IBAN formats by country. See required length, country code, and example IBANs. Useful for international banking and transfers.

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Colors

Color tools for designers and developers. Convert HEX, RGB, and HSL values, generate gradients, extract palettes from images, and check accessibility contrast.

Color Palette Extractor
Upload an image and extract dominant colors. Generate beautiful palettes for design, branding, or art.
Gradient Generator
Create linear CSS gradients and copy code instantly. Design custom gradients with multiple colors and directions.
RGB ⇄ HSL
Convert colors between RGB and HSL with a live color swatch.
CSS Filter Generator
Design and preview CSS filters including blur, brightness, contrast, grayscale, sepia, saturate, and hue-rotate. Copy the CSS instantly.
Material Palette
Browse Google’s Material Design color palettes. View all shades, copy hex codes instantly, and preview text on background colors.
Flat UI Colors
Browse the Flat UI Colors palettes (v1 & v2). View all swatches and copy hex codes instantly for use in your designs and code.

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Dates & Time

Date and time calculators to convert time zones, calculate date differences, countdown to events, work with timestamps, or run stopwatches and timers.

Timestamp Converter
Convert Unix timestamps to human-readable dates and back. Supports ISO 8601 and local time conversion.
Date Difference
Calculate the difference between two dates in days, weeks, or months. Fast and accurate date difference tool.
Countdown Timer
Create a countdown to any date or time. Useful for events, launches, deadlines, or personal reminders.
Date Math
Add or subtract years, months, days, hours, and minutes from a date. Quick online date calculator.
Stopwatch
Start, pause, and reset a precise stopwatch for tasks, workouts, and speed-runs.
Days Until
Enter a date and see how many days are left (or days since). Simple and fast.

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Design

Visual design utilities to create and preview modern UI styles. Generate neumorphism, glassmorphism, gradients, filters, and ready-to-use CSS for beautiful interfaces.

Neumorphism Generator
Generate neumorphic soft UI effects with adjustable shadows, blur, border radius, and inset mode. Copy CSS code instantly.
Glassmorphism Generator
Generate glassmorphism CSS with background transparency, blur, border radius, and frosted glass effects. Copy CSS code instantly.

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Developers

Handy developer tools for testing, debugging, and generating code. Includes JSON formatters, regex testers, JWT decoders, minifiers, and CSS utilities.

JWT Decoder
Decode JWT header and payload safely in your browser. Inspect claims and structure without sending tokens anywhere.
Cron Parser
Parse cron expressions and preview next run times. Useful for devs managing scheduled tasks and crontab jobs.
HMAC Generator
Compute HMAC signatures with SHA-256, SHA-1, or MD5 using a secret key. Secure online hashing tool.
Regex Tester
Test and debug JavaScript regular expressions. Highlight matches and quickly verify regex patterns.
URL Parser
Parse a URL into protocol, host, path, query string, and hash. Quick online URL analyzer tool.
JS Minifier
Minify and compress JavaScript code instantly. Reduce file size with Terser-style compression and improve load speed.
CSS Minifier
Minify CSS online by removing whitespace, comments, and redundancy. Optimize your stylesheets quickly.
HTML Minifier
Minify HTML code instantly. Remove comments, extra spaces, and reduce file size for faster websites.
JSON Schema Validator
Validate JSON data against a schema. Catch errors instantly with fast, browser-based JSON schema validation.
IP Checker
See your current public IP address (IPv4/IPv6) instantly. Runs client-side using a public API.
Password Strength Checker
Quickly estimate password strength with visual feedback and tips.
HTML Formatter
Format and pretty-print HTML. Uses Prettier if available, with a small fallback.

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Images

Image tools to compress, resize, convert, and optimize pictures. Extract palettes, convert to WebP, grayscale, run OCR, or view EXIF photo metadata.

Image Compressor
Compress images in your browser to reduce file size without losing quality. Supports JPG, PNG, and WebP.
PNG ⇄ JPG
Convert PNG to JPG or JPG to PNG instantly in your browser. Preserve quality and download in seconds.
Image Resizer
Resize images client-side. Keep aspect ratio, adjust quality, and choose format (JPG, PNG, WebP).
EXIF Viewer
Upload an image and view EXIF metadata including camera model, lens, exposure, and GPS location.
Image to WebP
Convert images (JPG, PNG) to WebP format online. Reduce file size while keeping high quality for the web.
Image Grayscale
Convert images to grayscale instantly in your browser. Preview and download black & white versions.
Image to Text (OCR)
Upload an image and extract text instantly using OCR technology.

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