Best Free Utility Tools Online

Calculate estimated Google AdSense earnings based on page views, CTR, and RPM/CPC rates instantly in your browser.

Calculate exact age in years, months and days from any birthdate. Birthday countdown included — free, no signup.

Convert between degrees, radians, gradians, and more instantly. Our free online Angle Converter is perfect for students, engineers, and mathematicians. Fast and accurate.

Convert between volt-amperes (VA), millivolt-amperes, and more instantly. Our free online tool is perfect for electrical engineers and technicians.

Convert between square meters, square feet, acres, and more instantly. Our free online Area Converter is perfect for real estate, construction, and design projects.

Calculate the mean, median, mode, and range of any dataset instantly. Our free online Average Calculator helps you analyze statistics and numeric data in seconds.

Decode Base64 strings back to their original plain text instantly. Our privacy-first tool processes everything in your browser, ensuring your data never leaves your device.

Encode plain text into Base64 format instantly. Our free online tool is perfect for developers, data transmission, and secure character representation in web URLs.

Convert between coulombs, millicoulombs, and other electrical charge units instantly. Our free online tool provides quick and accurate physics base transformations.

Transform color codes between HEX, RGB, HSL, and CMYK formats instantly. Our free online tool helps designers and developers manage color schemes with precision.

Calculate the confidence interval for your statistical data instantly. Our free online tool helps you understand data precision and margin of error in your research.

Convert subtitle files from SRT to VTT format instantly. Our free online tool ensures compatibility with web-based video players and modern streaming platforms.

Convert subtitle files from VTT to SRT format instantly. Our free online tool makes it easy to use web captions with traditional desktop video players.

Calculate Cost Per Mille (CPM) for your advertising campaigns instantly. Our free online tool helps marketers and creators understand their ad spend and reach efficiency.

Generate valid dummy credit card numbers for software testing and data validation. Our free online tool provides numbers that pass Luhn algorithm checks without being real cards.

Check if a credit card number is valid using the Luhn algorithm instantly. Our free online tool helps you verify card formats and identify card types for testing purposes.

Convert currencies with real-time exchange rates instantly. Our free online tool supports all major global currencies for travel, business, and financial planning.

Convert between amperes, milliamperes, and other electrical current units instantly. Our free online tool is perfect for electronics and electrical engineering tasks.

Convert between bytes, kilobytes, megabytes, and gigabytes instantly. Our free online tool helps you understand data storage and file sizes in seconds.

Create professional disclaimers for your website or app instantly. Our free online generator helps you protect your business and comply with legal requirements.

Calculate the final price after discounts and taxes instantly. Our free online tool helps you find the best deals and savings while shopping.

Retrieve all DNS records (A, MX, TXT, CNAME) for any domain instantly. Our free online tool helps you troubleshoot website hosting and email configuration issues.

Find the exact age of any domain name instantly. Our free online tool helps with SEO research, domain appraisal, and competitive analysis.

Find the IP address of any website instantly. Our free online tool helps you identify server locations and troubleshoot network connectivity issues.

Convert 'each' pricing to bulk totals and unit costs. Compare pack deals instantly — free, no signup.

Convert energy between joules, calories, kWh and BTU. Physics and bills alike — free, no signup.

Find the numeric ID of any Facebook profile, page or post from its URL. For developers — free, no signup.

Generate valid FAQPage JSON-LD schema for rich Google results. Paste Q&As, copy code — free.

Convert frequency between Hz, kHz, MHz and GHz. Radio and audio math — free, no signup.

Inspect HTTP response headers of any URL: server, caching, security and redirects. Free, no signup.

Add or remove 5%, 12%, 18% and 28% GST for Indian billing. Inclusive-exclusive math — free.

Convert HEX colors to RGB values with live preview. Copy for CSS in one click — free, no signup.

Discover where any website is hosted: provider, IP and nameservers. Competitor intel — free.

Generate Apache .htaccess 301 redirect rules without regex pain. HTTP to HTTPS too — free.

Look up any HTTP status code: 200, 301, 404, 500 and more explained plainly. Debug faster — free.

Convert illuminance between lux, foot-candles and lumens. Lighting design math — free.

Submit URLs to Bing, Yandex, and other search engines instantly using the IndexNow protocol. Fast, 100% private client-side processing with zero file uploads and no registration required.

Check your internet connection speed online free. Measure your download speed, upload speed, and ping instantly.

See your public IP, location, ISP and timezone instantly. Network details — free, no signup.

Convert length between mm, cm, inches, feet, meters and miles. Everyday math — free.

Plan loans with EMI, total interest and amortization schedules. Borrow smarter — free.

Calculate profit margins, markups and breakeven points. Pricing clarity — free, no signup.

Generate MD5 hashes for passwords and file checksums. Instant digests — free, no signup.

Convert numbers to Roman numerals (MMXXVI) and back. History homework — free, no signup.

Convert running pace between min/km, min/mile and speed. Race planning — free, no signup.

Check any page's total weight: HTML, CSS, JS and images broken down. Speed audit — free.

Convert ppm, ppb, percent and mg/L concentrations. Lab and pool math — free, no signup.

Create cryptographically secure, random passwords online. Customize length, character sets, and verify strength locally.

Generate cryptographically secure, random passwords with custom lengths, symbols, numbers, and uppercase characters locally on your device.

See exactly what PayPal takes from every sale, domestic and international. Price with fees in mind — free.

Find percentages, increases, decreases and reverses in one box. Everyday math — free, no signup.

Convert power between watts, kilowatts, horsepower and BTU/hr. Engine math — free, no signup.

Convert pressure between PSI, bar, kPa, atm and mmHg. Tire and lab math — free.

Generate a GDPR-friendly privacy policy for your site or app in minutes. Copy-ready — free.

Calculate odds for dice, cards, coins and events with steps. Stats clarity — free, no signup.

Read QR codes from uploaded images to reveal links and text. Instant decode — free, no signup.

Make custom QR codes with colors, logos and frames for links, Wi-Fi and UPI. Free, no signup.

Generate random UUIDs v4 in bulk for databases and testing. One click, a thousand IDs — free.

Convert reactive energy between kVArh, MVArh and more. Power systems math — free, no signup.

Convert reactive power between kVAr, MVAr and VAr. Electrical grids simplified — free.

Trace any URL's full redirect chain: 301s, 302s and final landing page. SEO audits — free.

Convert RGB values to HEX codes with live color preview. One-click CSS copy — free.

Translate Roman numerals (XIV, MMXXVI) to regular numbers. Ancient math — free.

Add US state sales tax to prices or back it out. Checkout math — free, no signup.

Preview your site at phone, tablet, laptop and 4K sizes. Responsive testing — free.

Check if any website or server is up, slow or down right now. Instant status — free.

Convert speed between km/h, mph, knots, m/s and Mach. Travel math — free, no signup.

Convert Celsius, Fahrenheit and Kelvin with formula shown. Weather and lab — free.

Convert seconds to hours, days to weeks, and across timezones. Schedule math — free.

Convert torque between Nm, ft-lb, kg-m and more. Garage and engineering — free.

Fast and privacy-conscious URL Decode to decode web links and URI parameters directly in your browser with no server logging.

Fast and privacy-conscious URL Encode to encode web links and URI parameters directly in your browser with no server logging.

Fast and privacy-conscious URL Opener to opener web links and URI parameters directly in your browser with no server logging.

Fast and privacy-conscious URL Parser to parser web links and URI parameters directly in your browser with no server logging.

Generate clean rewrite rules for Apache and Nginx. Pretty URLs without pain — free.

Shorten long web URLs into compact, easily shareable links for social media, marketing campaigns, and messages with zero tracking.

Easily build campaign URLs with UTM parameters for Google Analytics tracking. Free online UTM builder for marketing campaigns, social media, and email links — 100% private, no signup.

Convert voltage between volts, millivolts and kilovolts. Circuit math — free, no signup.

Convert volume between liters, gallons, cups and mL. Cooking and lab — free.

Convert flow rates: L/min, GPM, CFM and m³/h. Plumbing math — free, no signup.

Convert weight between kg, pounds, ounces and grams. Gym and shipping — free.

Instantly see your browser name, version, OS and engine. Debug compat — free.

See your public IPv4/IPv6 address with location and ISP. One glance — free.

See your screen resolution, viewport and pixel ratio live. Design reference — free.

View your full User-Agent string with parsed browser and OS. Copy ready — free.

Look up any domain's owner, registrar and expiry dates. Due diligence — free.

Detect any site's WordPress theme and plugins in seconds. Spy ethically — free.

Free Other Tools online tool. Fast and secure. Fast, 100% private client-side processing with zero file uploads and no registration required.

Format, convert, and manipulate text content. Fast, 100% private client-side processing with zero file uploads and no registration required.

Generate high-converting, customized whatsapp link ideas, copy, and templates. Easily customize and copy results in one click.

Generate optimized qr code generator for business details. Instantly copy or share customized outputs.

Generate a custom Terms and Conditions page for your website, app, blog, or store. Protect your intellectual property and limit liability.