Square Footage Calculator
Calculate square footage for rooms, floors, walls, and land. Supports rectangles, triangles, circles, and irregular shapes. Free and instant.
Percentage Calculator
Calculate percentages, percentage change, percentage difference, and more. Multiple calculation modes for everyday and professional use.
Age Calculator
Calculate exact age in years, months, days, hours, and minutes from any date. Find the difference between two dates instantly.
Base64 Decode
Decode Base64-encoded strings and files instantly in your browser. Supports standard and URL-safe Base64. No data sent to servers.
Base64 Encode
Encode text or files to Base64 format instantly. Supports standard and URL-safe Base64 encoding. Free and client-side.
URL Encode / Decode
URL encode and decode strings, query parameters, and full URLs. Handles all special characters and Unicode. Essential developer tool.
Password Strength Checker
Check the strength of any password instantly. Get detailed analysis, crack time estimates, and improvement suggestions. 100% client-side.
JSON Tools
Format, validate, minify, and convert JSON in your browser. Pretty-print messy JSON, spot syntax errors with line numbers, and switch between JSON, YAML, CSV, and XML.
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-512 and other cryptographic hashes from any text or file. Useful for integrity checks, password hashing demos, and developer testing.
Word Counter
Count words, characters, sentences, paragraphs, and reading time as you type. Useful for essays, blog posts, social media captions, and SEO content.
Epoch / Unix Time Converter
Convert Unix timestamps to human-readable dates and back. Supports milliseconds, seconds, and time zone conversions. Essential for backend debugging and log analysis.
Text Repeat
Repeat any text or character N times with optional separators and newlines. Useful for testing, padding, formatting, and generating placeholder content.
Crontab Helper
Build and decode crontab expressions with plain-English explanations. Validate cron schedules before deploying. Includes a reference of common patterns.
Regex Guide
Build and test regular expressions with a reference library and live explanations. Covers JavaScript, Python, PCRE, and POSIX flavors with worked examples.
Unit Cheatsheet
Engineering and scientific unit reference — converters, cheat sheets, and printable charts for length, mass, temperature, energy, and more.
Hours Calculator
Free hours calculator with overtime and pay — for weekly timesheets, payroll, and freelance billing. Handles breaks, overnight shifts, and decimal hours.
Clock With Us
Online alarm clock, timer, stopwatch, world clock, and time zone converter — all browser-based. Set alarms that ring even with the tab in the background.
Margin vs Markup
Convert between profit margin and markup, find break-even, and factor in platform fees, shipping, and tax. Multi-product comparison included.
Dimensional Weight Calculator
Calculate billable (dimensional) shipping weight for FedEx, UPS, USPS, DHL and more carriers. Compare actual vs volumetric weight with current divisors.
Box Volume Calculator
Calculate the volume of a box from its length, width, and height in any units. For shipping, storage, and packaging planning.
Girth Calculator
Parcel length-plus-girth against carrier size limits, plus body circumference measurements for fitness. Two calculators in one.
Solar Calculator
Free, unbiased solar and off-grid calculators — system sizing, savings and payback, battery banks, and country-specific incentive rules.
CIDR Calculator
Calculate, split, and visualize subnets from CIDR notation. IPv4/IPv6, VLSM planner, cloud-aware reserved IPs, and Terraform export.
Subnet Mask Calculator
Network and broadcast addresses, usable host range, wildcard masks, and VLSM planning for IPv4 and IPv6. Cloud-aware, with a learn center.
Transform Case
Convert text between Title Case (AP, Chicago, APA, MLA), sentence case, camelCase, snake_case, kebab-case, and more, with side-by-side preview.
Picture Toolkit
Browser-based image tools — compress, convert, resize, crop, and watermark. JPG, PNG, WebP, AVIF, HEIC. Files never leave your device.
Remove Metadata
Strip EXIF, GPS, and hidden metadata from images, PDFs, and Office files — locally in your browser, with a pre-strip inspector.
EMI Calculator
Calculate EMIs for home, car, and personal loans in India. See total interest, principal breakdown, and a full amortization schedule.
Voltage Drop Calculator
Calculate voltage drop across wire runs by gauge, length, and current. Check against NEC limits for safe electrical installations.
Calorie Calculator
Estimate daily calorie needs, TDEE, and macros from your age, weight, height, and activity level for weight loss or gain.
Total Interest Calculator
See the total interest you'll pay over the life of any loan, with monthly payments and a complete amortization breakdown.
AC Tonnage Calculator
Size an air conditioner for any room by square footage, climate, and sun exposure to find the right cooling capacity in tons.
Tank Volume Calculator
Calculate the volume and fill level of cylindrical, rectangular, and oval tanks in gallons, liters, and more.
Cubic Yardage Calculator
Work out cubic yards of concrete, gravel, mulch, or soil for landscaping and construction projects.
BMI & BMR Calculator
Calculate your Body Mass Index and Basal Metabolic Rate, plus daily calorie needs based on your activity level.
Solar Battery Bank Calculator
Size an off-grid battery bank from your daily energy use, days of autonomy, and depth of discharge.
Fraction Calculator
Add, subtract, multiply, and divide fractions with clear step-by-step working and simplified results.
Backup Power Calculator
Size a generator or UPS by adding up appliance wattage and runtime for home and office backup power.
Stair Calculator
Calculate stair rise, run, stringer length, and number of steps to build code-compliant staircases.
Concrete Material Calculator
Estimate concrete, cement, sand, and aggregate quantities for slabs, footings, columns, and walls.
SIP Calculator
Project the future value of your mutual fund SIP investments with expected returns and step-up options.
Roofing Material Calculator
Estimate shingles, underlayment, and materials needed for any roof by area, pitch, and waste factor.
GPA Calculator
Calculate your GPA and CGPA from course grades and credit hours, with weighted and unweighted options.
Construction Calculator
A suite of construction math tools — feet-and-inches, area, volume, and material estimates for job sites.
Pool Volume Calculator
Calculate the water volume of rectangular, round, and oval pools in gallons and liters for dosing and heating.
Cooking Converter
Convert cooking measurements between cups, grams, ounces, and milliliters for accurate recipes.
Number to Words
Convert numbers into written words and currency amounts for checks, invoices, and legal documents.
PDF Tools
Merge, split, compress, convert, and edit PDF files right in your browser — nothing is uploaded to a server.
Color Code Kit
Convert colors between HEX, RGB, HSL, and more, build palettes, and check contrast for accessible design.
Barcode & QR Generator
Create QR codes and barcodes for URLs, text, Wi-Fi, and products, then download them as PNG or SVG.
Internet Speed Test
Test your download, upload, and ping speeds right in the browser with an accurate, ad-light speed test.
IP Address Checker
Instantly see your public IP address, location, ISP, and browser details — IPv4 and IPv6 supported.
WHOIS Lookup
Look up domain registration, ownership, expiry dates, and DNS records with a fast WHOIS lookup tool.
Everything you need for UUID generation, validation, and documentation
UUID v4 Generator
Cryptographically secure random UUIDs. The most widely used UUID version.
UUID v7 Generator
Sortable time-based UUIDs. RFC 9562 recommended for database primary keys.
Bulk UUID Generator
Generate up to 1,000 UUIDs at once in multiple formats. Download as text.
UUID Validator
Validate any UUID and identify its version, variant, and format compliance.