RunX Tools directory
All Free Browser Tools
274 fast tools for everyday work. Search, open, and finish your task with no account required.
$ Business Tools 18 ▣ Construction & Home Improvement 20 Aa Text Tools 20 {} Developer Tools 37 ▦ Workplace & Pay 10 ✦ Generators 4 ◒ Kitchen & Recipe 11 % Calculators 30 ✦ Measurement Converters 0 ⌂ Privacy-Friendly Tools 7 ✦ SEO Tools 0 ✦ Aesthetic Text Tools 16 ✦ Productivity Tools 0 ✦ Design Tools 0 ♡ Lifestyle Calculators 9 ✦ Health & Fitness Calculators 0 ✦ Gaming Tools 0 ✦ Fun Calculators 0 ⚙ Automotive Tools 9 ¢ E-Commerce Fee Calculators 10 AI AI & Prompt Tools 7
Tool Library
Browse the full expanded RunX catalog: calculators, converters, AI prompt utilities, automotive tools, seller fee calculators, construction estimators, recipe helpers, gaming tools, text tools, SEO utilities, and local browser database tools.
401(k) Contribution Calculator Estimate annual 401(k) contributions, employer match, and simple multi-year totals. Add Line Numbers Add line numbers to plain text or code snippets. Aesthetic Font Changer Turn plain text into spaced aesthetic text for bios and captions. Age Calculator Calculate exact age in years, months, days, and total days from a birth date. Age in Days Calculator Calculate age in total days from a birth date or start date. Age on Other Planets Calculator Convert an Earth age into approximate ages on other planets. AI Context Window Trimmer Trim long text to an estimated token budget from the start, end, or both. Air Fryer Cooking Time Converter Convert oven cooking time and temperature into air fryer estimates. Amazon FBA Fee Calculator Estimate Amazon-style referral, fulfillment, and profit numbers. Amortization Calculator Estimate loan payment, total interest, and a simple amortization schedule. Anagram Solver Tool Find matching words from a custom word list using the letters you provide. Angle Converter Convert degrees, radians, gradians, turns, arcminutes, and arcseconds. Anime Watch Time Calculator Estimate total watch time for episodes, seasons, or a full series. Apex Legends Sensitivity Converter Estimate sensitivity changes using DPI and multiplier values for shooter settings. Area Converter Convert square meters, square feet, acres, hectares, and more. ASCII Converter Convert text to ASCII codes or ASCII codes back to text. Aspect Ratio Calculator Calculate aspect ratios and resized dimensions for images and video. Asphalt Tonnage Calculator Estimate asphalt tons from paving area and thickness. Baking Ingredient Scaler Scale a baking ingredient amount from original servings to desired servings. Base64 Encoder/Decoder Encode text to Base64 or decode Base64 to text. Fast, secure, and private. Belt Size Calculator Estimate belt size from pants waist size. Binary Calculator Add, subtract, multiply, or divide binary numbers. Binary to Text Converter Convert binary character codes into readable text. Biorhythm Calculator Generate entertainment-only biorhythm percentages from a birth date and target date. Blank Space Copy Paste Generate blank and invisible-looking spacing characters for copy and paste. BMI Calculator Calculate body mass index from height and weight. BMR Calculator Estimate basal metabolic rate and maintenance calories. Bold Text Generator Convert letters and numbers into bold Unicode characters. Bolt Pattern Measurement Tool Estimate wheel bolt pattern diameter from lug count and measurement. Bra Size Calculator Estimate bra band and cup size from bust and underbust measurements. Bracket Maker Generator Generate a simple seeded matchup bracket from a list of names. Break-Even Calculator Find the units and revenue needed to break even. Brick Mortar Calculator Estimate brick count and mortar bags from wall area. Browser Database Backup Export and import RunX local IndexedDB data from this browser. Browser Storage Inspector View localStorage keys and IndexedDB counts saved by RunX tools in this browser. Bubble Text Generator Convert letters and numbers into bubble Unicode characters. Calorie Calculator Estimate daily calories for maintenance, loss, or gain. Car Depreciation Estimator Estimate vehicle value after annual depreciation. Car Loan Calculator Estimate car loan monthly payments, total paid, and interest. Case Converter Convert text to uppercase, lowercase, title case, sentence case, and more. Cat Age Calculator Estimate a cat age in human years using common cat-age conversion rules. Character Counter Count characters with or without spaces, check max length, and see remaining characters. Checklist Generator Create quick checklists for work, launch tasks, and planning. Clothing Size Converter Estimate general clothing size from chest and waist measurements. CMYK to Hex Converter Convert CMYK percentages to approximate hex colors. Coffee Water Ratio Calculator Calculate coffee-to-water ratio in grams, cups, and ounces. Color Contrast Checker Check color contrast ratios for accessible text and backgrounds. Color Converter Convert HEX colors to RGB and HSL with a live preview. Color Palette Generator Generate random color palettes for design projects. Commission Payout Calculator Calculate estimated commission payout from sales, commission rate, base pay, and bonus. Compound Interest Calculator Estimate future value, total contributions, and interest earned with compounding. Concrete Slab Calculator Estimate concrete volume for slabs, patios, pads, and footings. Cosine Similarity Calculator Calculate cosine similarity between two numeric vectors. CPC Calculator Calculate cost per click, total ad spend, or clicks for marketing campaigns. CPM Calculator Calculate cost per thousand impressions for ads, campaigns, and sponsorships. Cron Expression Generator Build cron expressions with fields and common schedule presets. Crosshair Code Generator Generate a simple shareable crosshair settings code from color, gap, size, and thickness values. Crypto Profit Calculator Calculate crypto profit, loss, net proceeds, and ROI percentage. CSS Gradient Generator Create CSS linear gradients and copy the code. CSS Minifier Minify CSS code in your browser to reduce file size and clean up stylesheets. CSS Unit Converter Convert CSS px, rem, em, percent, vw, and vh values quickly. CSV to JSON Converter Convert CSV rows into formatted JSON locally. CSV to Table Viewer Paste CSV data and view it as a clean table instantly. Curl To Fetch Converter Convert common cURL commands into JavaScript fetch snippets. Cursive Text Converter Convert plain text into script-style Unicode letters. D&D Ability Score Generator Roll browser-generated ability scores using common 4d6 drop-lowest style logic. Data Storage Converter Convert bytes, KB, MB, GB, TB, KiB, MiB, GiB, and TiB. Date Difference Calculator Calculate days, weeks, months, and years between two dates. Day of the Week Calculator Find the weekday for any date. Decimal to Fraction Converter Convert decimals into simple fraction approximations. Deck Lumber Estimator Estimate deck boards from deck size and board width. Depop Fee Calculator Estimate Depop-style seller fees and payout. Depreciation Calculator Calculate straight-line depreciation, accumulated depreciation, and book value. Discord Text Formatter Format Discord messages with bold, italic, code, quote, spoiler, and heading styles. Discount Calculator Calculate sale price, savings, and final total after discount. Dog Age to Human Years Calculator Estimate a dog age in human years with a simple browser calculator. DPI to eDPI Calculator Calculate effective DPI from mouse DPI and in-game sensitivity. Drywall Sheet Calculator Estimate drywall sheet count from wall and ceiling area. eBay Fee Calculator Estimate eBay-style selling fees and net proceeds. EBITDA Calculator Calculate EBITDA, EBITDA margin, and operating profit from basic business inputs. Egg Substitution Calculator Calculate common egg substitutes such as applesauce or flax eggs for baking. Elden Ring Rune Calculator Estimate total runes needed for repeated level costs or farming sessions. Email Signature Generator Create a clean HTML email signature from your name, role, company, and links. Energy Converter Convert joules, kilojoules, calories, kilocalories, watt-hours, and BTU. Engine Compression Ratio Calculator Calculate static compression ratio from swept and clearance volume. Engine Displacement Calculator Calculate engine displacement from bore, stroke, and cylinder count. Etsy Fee Profit Calculator Estimate Etsy-style marketplace fees, profit, and margin. Factorial Calculator Calculate factorial values for whole numbers. Fancy Font Generator Create several Unicode text styles from one plain input. Fantasy Football Draft Order Generator Randomize a draft order from a list of team names in your browser. Fence Post Calculator Calculate how many fence posts are needed from fence length and spacing. Find and Replace Text Find and replace words, phrases, or patterns in text instantly. Fraction to Decimal Converter Convert fractions into decimal values. Freelance Hourly Rate Calculator Calculate a sustainable freelance hourly rate from income goals, expenses, and billable hours. Freelance Tax Withholding Calculator Estimate freelance tax reserves and take-home amount from income and expenses. Fuel Consumption Converter Convert MPG, km/L, and L/100 km for fuel economy comparisons. GCD LCM Calculator Find the greatest common divisor and least common multiple. Gear Ratio Calculator Calculate gear ratio and estimated speed from RPM, tire size, and final drive. Glitch Text Converter Create glitch-style text using Unicode marks and symbol substitutions. GPA Calculator Calculate GPA from grades and credit hours. Grass Seed Calculator Estimate grass seed pounds from lawn area and seed rate. Gravel Tonnage Calculator Estimate gravel tons from area, depth, and material density. Hash Generator Generate SHA hashes from text using your browser crypto API. Hat Size Calculator Convert head circumference into an approximate hat size. Headline Analyzer Score headline length, clarity, and basic power-word usage. Hex Calculator Calculate with hexadecimal numbers and see decimal equivalents. Hex to CMYK Converter Convert hex colors to approximate CMYK values. Hex to RGB Converter Convert hex color codes to RGB values. Hex to Text Converter Convert hexadecimal byte values into readable text. Horsepower to Weight Calculator Calculate horsepower-to-weight ratio for cars, bikes, and performance comparisons. Hourly Paycheck Calculator Estimate gross pay, deductions, and net pay for hourly work. Hourly to Salary Calculator Convert hourly pay into annual, monthly, and weekly salary estimates. Hours to Minutes Converter Convert decimal hours into minutes and seconds. HTML Entity Encoder/Decoder Encode and decode HTML entities for safe web text and markup. HTML Formatter Format messy HTML into readable, indented code directly in your browser. HTML Minifier Minify HTML by removing comments and extra whitespace in your browser. Image Color Picker Pick a color from an uploaded image in your browser. Image Compressor Compress JPG, PNG, and WebP images in your browser with quality and resize controls. Image Resizer Resize images to exact dimensions in your browser and download the result. Inflation Calculator Estimate how inflation changes the future cost of money over time. Insulation R-Value Calculator Combine insulation layers and estimate added R-value needed. Investment ROI Calculator Calculate investment return, net profit, and ROI percentage in your browser. Invisible Character Generator Copy zero-width and invisible Unicode characters for testing and formatting. Invoice Generator Create professional invoices for your business. Add line items, apply tax and discounts, and download or print instantly. JavaScript Minifier Minify JavaScript snippets in your browser by removing comments and extra whitespace. JSON Formatter Format, minify, and validate JSON data. See clear error messages with line numbers. JSON to CSV Converter Convert JSON arrays into CSV files in your browser. Json To XML Converter Convert JSON objects into simple XML in your browser. JSON to YAML Converter Convert JSON data into a readable YAML-style format. JSON Validator Validate JSON and find syntax errors instantly in your browser. JWT Decoder Decode JSON Web Tokens locally in your browser without sending tokens to a server. JWT Validator Decode a JWT token and inspect its header, payload, and signature presence. Keyword Density Checker Check keyword frequency, word count, and top repeated terms in any text. League of Legends CS Calculator Calculate creep score per minute and estimate pacing targets for a match. Leap Year Checker Check whether a year is a leap year. Length Converter Convert meters, feet, inches, kilometers, miles, yards, and centimeters. Line Sorter Sort lines alphabetically, reverse order, and remove empty lines. Liquid Measurement Converter Convert cups, tablespoons, and teaspoons into milliliters and fluid ounces. LLM Token Counter Estimate token count and character usage for prompts and AI text. Loan Calculator Estimate monthly payment, total interest, and total cost for a loan. Local Bookmark Manager Save private bookmarks in this browser with JSON export. Local Expense Tracker Track simple expenses locally in your browser and export CSV. Local Notes Write private notes saved only in this browser. Local Reading List Save articles to read later using local browser storage. Local To-Do List Manage tasks saved only in this browser. Lorem Ipsum Generator Generate placeholder text for designs, mockups, and layouts. Lucky Number Generator Generate random lucky numbers for entertainment, games, or quick picks. Luggage Linear Inches Calculator Add luggage length, width, and height to check linear inches. Lumber Board Foot Calculator Calculate board feet from lumber dimensions and quantity. Macro Calculator Convert calorie targets into protein, carbs, and fat grams. Markdown Previewer Preview Markdown and copy clean HTML in your browser. Markdown Table Generator Create clean Markdown tables from rows and columns in your browser. Markup Calculator Calculate markup, profit, margin, or selling price from cost. Matrix Calculator Calculate a 2x2 matrix determinant and inverse. Mercari Fee Calculator Estimate seller payout after marketplace and payment fees. Meta Tag Generator Generate title, description, canonical, Open Graph, and Twitter tags. Minecraft Coordinate Converter Convert coordinates between Overworld and Nether directions for quick travel planning. Minecraft Nether Portal Calculator Convert Overworld and Nether coordinates using the common 8:1 travel ratio. Mirror Text Generator Mirror and reverse text for stylized usernames, posts, and messages. Morse Code Translator Translate text to Morse code and Morse code back to text. Mortgage Payoff Calculator Estimate how extra payments change your mortgage payoff timeline. Mulch Yardage Calculator Estimate mulch cubic yards from bed size and depth. Name Compatibility Calculator Generate a fun compatibility score from two names in your browser. Open Graph Generator Generate Open Graph meta tags for social sharing previews. Overtime Pay Calculator Estimate regular pay, overtime pay, and total gross pay from hours and rate. Paint Gallon Calculator Estimate gallons of paint from area, coats, and coverage. Password Generator Generate secure, random passwords with customizable options. Copy and use instantly. Paver Stone Calculator Estimate paver count from patio area and paver size. PayPal Fee Calculator Estimate PayPal-style transaction fees and net received. Per Diem Calculator Estimate per diem reimbursement from daily rates, eligible days, and meal deductions. Percentage Calculator Calculate percentages, percentage increase/decrease, and solve common percentage problems. Percentage Increase Calculator Calculate percentage increase or decrease between two values. Pokémon Weakness Type Calculator Check a simplified type matchup multiplier for one attacking type against one defending type. Pomodoro Timer Run focus and break sessions with a simple browser timer. Poshmark Fee Calculator Estimate marketplace seller fees and profit. Power Converter Convert watts, kilowatts, horsepower, BTU/h, and more. Pressure Converter Convert pascals, bar, psi, atm, torr, and kPa. Prime Number Checker Check whether a whole number is prime. Probability Calculator Calculate independent event probabilities. Profit Margin Calculator Calculate profit, markup, margin, revenue, and cost for products or services. Prompt Template Builder Build reusable prompt templates with role, task, context, and output format sections. PX To REM Converter Convert pixels to rem values for CSS spacing and typography. QR Code Generator Generate QR codes for text, URLs, WiFi credentials, and more. Download as PNG. Quote Generator Create simple printable quotes for clients with line items, totals, and validity dates. Random Number Generator Generate secure random numbers within a custom range. Rebar Weight Calculator Estimate total rebar weight from bar size, length, and quantity. Receipt Generator Create a simple printable payment receipt with customer, method, date, and amount. Recipe Multiplier Divider Multiply or divide recipe ingredient amounts for batch resizing. Redirect Rule Generator Create redirect rules for Cloudflare, Netlify, and Apache-style redirects. Regex Tester Test regular expressions against sample text and view matches. REM To PX Converter Convert rem units to pixels for CSS design work. Remove Duplicate Lines Remove duplicate lines from text. Keep or remove duplicates with case-sensitive and trim options. Remove Empty Lines Remove blank lines from pasted text while keeping the remaining lines in order. Retaining Wall Calculator Estimate retaining wall block count from wall size and block face area. RGB to Hex Converter Convert RGB color values to hex color codes. Ring Size Converter Convert a US ring size into approximate EU and Japanese ring sizes. ROAS Calculator Calculate return on ad spend from revenue and advertising cost. Robots.txt Generator Create a simple robots.txt file with sitemap and disallow rules. Roman Numeral Converter Convert numbers to Roman numerals and Roman numerals back to numbers. Roofing Shingle Calculator Estimate roofing squares and bundles from roof area. Salary to Hourly Calculator Convert annual salary into hourly, weekly, and monthly pay estimates. Sales Tax Calculator Add or remove sales tax from a price with any tax rate. Scientific Calculator Evaluate common scientific calculator expressions in your browser. Seconds to Hours Converter Convert seconds into hours, minutes, and seconds. SERP Snippet Preview Preview how a page title, URL, and meta description may appear in Google search results. Severance Pay Calculator Estimate gross severance pay from weekly pay, years of service, and weeks-per-year formula. SHA256 Hash Generator Generate a SHA-256 hash from text using your browser. SHA512 Hash Generator Generate a SHA-512 hash from text using your browser. Shift Differential Calculator Estimate extra pay from evening, night, weekend, or special shift differentials. Shoe Size International Converter Estimate US, UK, and EU shoe sizes from foot length. Shopify Pricing Tier Calculator Compare simplified monthly platform cost and processing impact. Simple Interest Calculator Calculate simple interest and total amount from principal, rate, and time. Sitemap Generator Generate a simple XML sitemap from a list of URLs. Slow Cooker To Oven Time Converter Estimate oven time from slow cooker low or high cooking times. Slug Generator Create clean SEO-friendly URL slugs from titles and text. Small Caps Text Generator Convert text into small caps Unicode style where supported. Soil & Topsoil Calculator Estimate cubic yards of soil or topsoil from area and depth. Sourdough Hydration Calculator Calculate sourdough hydration including starter flour and water contribution. Speed Converter Convert mph, km/h, m/s, knots, and feet per second. SQL Formatter Format simple SQL queries for easier reading. Stable Diffusion Resolution Calculator Calculate image dimensions, megapixels, and aspect ratios for AI image workflows. Standard Deviation Calculator Calculate sample standard deviation from a list of values. Strikethrough Text Generator Add strikethrough styling to text using Unicode combining characters. String Length Calculator Count string length, characters without spaces, words, and lines. Strip HTML Tags Remove HTML tags and extract clean plain text. Stripe Fee Calculator Estimate payment processing fees and net received. Stud Framing Calculator Estimate wall studs and plates for framed walls. Substitute Teacher Pay Calculator Estimate substitute teacher gross and net pay from daily rate and days worked. Subtitles SRT Time Shifter Shift SRT subtitle timestamps forward or backward in your browser. Sugar To Honey Converter Convert sugar amount to an estimated honey substitution and liquid reduction. Tailwind Color Generator Generate a Tailwind-style color scale from a base color. Tarot Card Spread Generator Generate a random entertainment-only tarot spread with card positions and meanings. Temperature Converter Convert Celsius, Fahrenheit, and Kelvin instantly. Text Cleaner Remove extra spaces, empty lines, duplicate lines, and clean up your text. Text Diff Checker Compare two text blocks line by line in your browser. Text Reverser Reverse text characters instantly in your browser. Text to Binary Converter Convert plain text into binary character codes. Text to Hex Converter Convert plain text into hexadecimal byte values. Tile Count Calculator Estimate how many tiles you need for floors, walls, or backsplashes. Time Duration Calculator Calculate time between two times and subtract breaks. Time Zone Converter Convert a date and time between common world time zones. Timer & Stopwatch Use a simple browser timer and stopwatch with no app install. Timestamp Converter Convert Unix timestamps to readable dates and convert dates back to Unix time. Tip Pool Split Calculator Split a tip pool evenly or by hours worked using a browser calculator. Tire Size Comparison Calculator Compare tire diameter, sidewall, circumference, and speedometer difference. Torque Converter Convert newton-meters, pound-feet, pound-inches, and kilogram-force meters. Towing Capacity Calculator Estimate remaining towing margin from rating, trailer weight, cargo, and passengers. Trip Fuel Cost Calculator Estimate trip fuel cost from distance, fuel economy, and price per gallon. Turkey Thaw Time Calculator Estimate turkey thaw time by refrigerator or cold-water method. Twitter Card Generator Generate Twitter/X card meta tags for social previews. Underlined Text Generator Add underline styling to text using Unicode combining characters. Unit Converter Convert length, weight, temperature, volume, and speed units instantly. Upside Down Text Converter Flip text upside down using Unicode replacement characters. URL Encoder/Decoder Encode or decode URLs and text for safe web transmission. User Agent Analyzer Analyze a browser user agent string for basic browser, OS, and mobile information. UTM Builder Build campaign tracking URLs with UTM parameters. UUID Generator Generate secure random UUID v4 identifiers in your browser. Valorant to CS2 Sens Converter Convert a Valorant-style sensitivity estimate to a CS2-style sensitivity value. Vaporwave Text Converter Convert text into full-width vaporwave style. Variance Calculator Calculate sample variance from a list of values. VAT Calculator Calculate VAT, tax-inclusive, and tax-exclusive prices instantly. Vector Dimension Visualizer Inspect vector length, magnitude, and normalized values for embedding experiments. Vinted Fee Calculator Estimate seller profit after adjustable marketplace costs. Volume Converter Convert liters, milliliters, gallons, quarts, cups, cubic meters, and cubic feet. Wallpaper Roll Calculator Estimate wallpaper rolls from wall area and roll coverage. Water Intake Calculator Estimate daily water intake from weight, activity, and climate. Weight Converter Convert kilograms, grams, pounds, ounces, tons, and stones. Word Counter Count words, characters, sentences, paragraphs, and reading time instantly. Word Frequency Counter Count repeated words and find the most common terms in text. Wordle Hint Generator Filter possible five-letter words using known letters, excluded letters, and positions. XML Formatter Format and clean XML markup for easier reading and debugging. YAML to JSON Converter Convert simple YAML key-value content into JSON. Yeast Conversion Calculator Convert instant yeast to active dry yeast, fresh yeast, and approximate grams. Zalgo Text Generator Add chaotic combining marks above and below text for spooky or glitchy styles.