Useful Tools for Everyone
Free, fast, and private. All tools run entirely in your browser — no account needed.
All 93 Tools
JSON Formatter & Validator
Format, validate, and minify JSON data instantly.
Base64 Encoder & Decoder
Encode text to Base64, or decode Base64 back to plain text. Supports full UTF-8.
UUID v4 Generator
Generate random UUIDs (v4) in bulk with one click.
URL Encoder & Decoder
Encode or decode URL components and query strings.
JSON to CSV Converter
Convert JSON arrays to CSV format with one click. Supports nested objects.
Random Wheel Spinner
Spin the wheel to pick random winners from your list. Three modes, CSV import, history tracking.
CSV to JSON Converter
Convert CSV files or pasted data to JSON arrays. Auto-detects headers and types.
Random Number & Dice
Generate random numbers, flip a coin, or roll dice — all in one place.
Random List Picker
Paste a list of items and pick random winners instantly. Perfect for raffles and giveaways.
Hash Generator
Generate MD5, SHA-1, and SHA-256 hashes from any text using your browser's built-in crypto.
Nickname Generator
Generate random nicknames, gamer tags, and fantasy names instantly.
Unix Timestamp Converter
Convert Unix timestamps to human-readable dates and back. Auto-detects seconds vs milliseconds.
Cron Expression Generator
Build cron schedule strings visually and get a plain-English explanation of when they run.
Age Calculator
Calculate your exact age in years, months, and days — plus total seconds lived for fun.
Work Day Calculator
Add working days to a start date (skipping weekends) to find a project deadline.
Life Progress Bar
Visualize how much of this year — and your life — has already passed with animated progress bars.
Pomodoro Timer
Browser-based 25/5 Pomodoro timer that shows the countdown in the browser tab title.
Favicon Generator
Create favicons from images, text, or emoji. Generate multiple sizes with live preview.
Case Converter
Convert text between 7 case styles: sentence, lower, UPPER, Title, Capitalized, aLtErNaTiNg, InVeRsE.
Text Cleaner
Remove duplicate lines, extra whitespace, line breaks, and unwanted characters with 7 cleaning modes.
Text Transformer
Reverse text, repeat N times, sort lines alphabetically, and find/replace with 4 transformation modes.
Text Analyzer
Count words, characters, sentences, find duplicates, and analyze word frequency with detailed statistics.
Online Notepad
Simple browser-based notepad with auto-save, download to .txt, and customizable font settings.
Phonetic Translator
Translate text to NATO alphabet, Pig Latin, or phonetic spelling with 3 conversion modes.
Plain Text Converter
Convert HTML to plain text, strip Markdown syntax, or extract text from RTF with 3 conversion modes.
Word Cloud Generator
Generate beautiful word clouds from text with customizable colors, sizes, and layouts.
Roman Numeral Converter
Convert between numbers and Roman numerals (I, V, X, L, C, D, M) with validation and date formatting.
Freelance Hourly Rate Calculator
Calculate your minimum freelance hourly rate, day rate, and weekly retainer based on income goals, expenses, and the true cost of unbillable hours.
Compound Interest Calculator
Calculate compound interest growth with monthly contributions. Interactive year-by-year chart with inflation-adjusted mode.
PayPal & Stripe Fee Calculator
Calculate PayPal and Stripe transaction fees. Enter the amount you want to receive and get the exact amount to charge.
Color Palette Generator
Generate harmonious 5-color palettes with WCAG accessibility contrast checking and one-click CSS/Tailwind export.
Aspect Ratio Calculator
Calculate pixel dimensions for any aspect ratio. Social media presets for YouTube, TikTok, Instagram, and more.
Image Resizer & Compressor
Resize and compress images using HTML5 Canvas. Set width, height, quality, or target file size. 100% browser-based — your images are never uploaded.
QR Code Generator
Generate QR codes from URLs, text, or email. Download as PNG.
Password Generator
Generate secure passwords with crypto.getRandomValues(). Length slider, character sets, entropy strength meter.
Percentage Calculator
Calculate percentages: X% of Y, what percent X is of Y, and percentage change.
BMI & BMR Calculator
Calculate BMI, BMR, and daily calorie needs with metric/imperial support.
Temperature Converter
Convert temperatures between Celsius, Fahrenheit, Kelvin, and Rankine in real time.
Color Picker
Pick colors and convert between HEX, RGB, HSL, CMYK. Check WCAG contrast ratios.
Lorem Ipsum Generator
Generate lorem ipsum placeholder text by paragraphs, sentences, or words.
Tip Calculator
Calculate tips, split bills, and find per-person amounts with custom tip percentages.
Regex Tester
Test regular expressions in real-time with match highlighting and capture group display.
JWT Decoder
Decode and inspect JSON Web Tokens — view header, payload, and expiry status instantly.
Markdown Preview
Live Markdown editor with split-pane preview, GFM support, and HTML export.
Password Strength Checker
Check how strong your password is with realistic crack-time estimates and improvement suggestions.
Morse Code Converter
Translate text to Morse code and decode Morse to English instantly.
KM to Miles Converter
Convert kilometers to miles and miles to km with a simple calculator.
MM to Inches Converter
Convert millimeters to inches and inches to mm with precision.
Text Reverser
Reverse text characters, words, or lines instantly online.
Random String Generator
Generate random strings with custom length and character sets.
GPA Calculator
Calculate your cumulative GPA on a 4.0 scale with grades and credits.
Paycheck Calculator
Calculate your net take-home pay from hourly or salary income with federal tax and deductions.
Loan Calculator
Calculate monthly loan payments and view a full amortization schedule with principal and interest breakdown.
Sales Tax Calculator
Add or remove sales tax for any US state. Pre-loaded with all 50 state tax rates.
Barcode Generator
Generate Code 128 barcodes from any text and download as SVG. No sign-up required.
Random Number Generator
Generate cryptographically random numbers in any range — dice, lottery, statistics, or any custom min/max.
Random Word Generator
Generate random English words filtered by type (noun/verb/adjective/adverb), length, and starting letter.
Username Generator
Generate creative usernames for gaming, social media, or professional profiles in 5 styles.
Date Difference Calculator
Calculate the exact difference between two dates in years, months, days, weeks, hours, and working days.
Number to Words Converter
Convert numbers to English words in cardinal, ordinal, or check-writing format up to quadrillions.
Reading Time Calculator
Estimate reading time, word count, speaking time, and text statistics by pasting any content.
KG to LBS Converter
Convert kilograms to pounds and back instantly. See results in lbs, oz, and stones with a quick-reference table.
Hours Calculator
Calculate hours between two times, add or subtract hours from a time, and track weekly work hours with pay calculation.
Calorie Deficit Calculator
Calculate your daily calorie deficit for weight loss using the Mifflin-St Jeor formula. Get your BMR, TDEE, and timeline to reach your goal weight.
Car Payment Calculator
Calculate your monthly car payment with APR, down payment, trade-in, taxes, and fees. Includes amortization table and total cost breakdown.
Fraction Calculator
Add, subtract, multiply, and divide fractions with step-by-step solutions. Supports mixed numbers. Shows work for students.
Margin Calculator
Calculate gross profit margin, markup percentage, and revenue needed. Includes break-even calculator and industry margin benchmarks.
Hex to RGB Color Converter
Convert hex color codes to RGB and HSL values instantly. Includes color picker, CSS variable output, and example colors.
Discount Calculator
Calculate sale price, discount percentage, or original price. Add sales tax, quantity, and see a discount comparison table.
Sleep Calculator
Find the best time to sleep or wake up based on 90-minute sleep cycles. Uses sleep science to show optimal bedtimes and wake times.
Word Counter
Count words, characters, sentences, and paragraphs in real time. Shows reading time, speaking time, keyword density, and content length benchmarks.
Investment Calculator
Calculate investment growth with compound interest and monthly contributions. Shows year-by-year breakdown and total returns.
Retirement Calculator
Calculate how much you need to retire using the 4% rule. See if you are on track and how contributions affect your retirement date.
TDEE Calculator
Calculate your Total Daily Energy Expenditure (TDEE) and BMR using the Mifflin-St Jeor equation. Get calorie targets for weight loss, maintenance, or gain.
Ovulation Calculator
Calculate your ovulation date and fertile window based on your last period and average cycle length. Shows 3 future cycle forecasts with visual timeline.
Body Fat Calculator
Estimate body fat percentage using the US Navy circumference method. Shows healthy ranges by gender, ACE classification, and comparison to BMI.
Income Tax Calculator
Estimate your 2025 federal income tax based on taxable income, filing status, and deductions. Shows marginal vs. effective tax rate and FICA breakdown.
Invoice Generator
Create professional invoices with itemized line items, discounts, taxes, and auto-save. Print as PDF or copy as plain text. Stores data in browser.
ROI Calculator
Calculate simple and annualized ROI (CAGR) with S&P 500 benchmark comparison. Includes profit/loss display and 3 example presets.
JavaScript Minifier
Minify JavaScript by removing whitespace, comments, and unnecessary characters. Shows original vs. minified size and reduction percentage.
Budget Calculator
Budget your income using the 50/30/20 rule. See recommended allocations for needs, wants, and savings. Includes custom split override.
Cooking Converter
Convert between cooking measurements: oz to ml, cups to grams, teaspoons, tablespoons, pints, and liters. Includes ingredient density selector for accurate cup-to-gram conversion.
Speed Converter
Convert between speed units: knots, mph, km/h, meters per second, and feet per second. Includes Beaufort wind scale reference and common speed benchmarks.
Area Converter
Convert between area units: square feet, square meters, acres, hectares, square yards, square miles, and square kilometers. Includes real estate size reference table.
Liquid Volume Converter
Convert between liquid volume units: US/UK gallons, liters, fluid ounces, cups, pints, and quarts. Clearly distinguishes between US and Imperial measurements.
Heart Rate Zone Calculator
Calculate your 5 heart rate training zones based on age and resting heart rate. Supports both the standard percentage method and the Karvonen formula.
Net Worth Calculator
Calculate your net worth by entering assets and liabilities across multiple categories. Includes age-based net worth benchmarks for context.
Protein Calculator
Calculate your daily protein needs based on body weight, activity level, and fitness goal (muscle gain, fat loss, or maintenance). Includes meal planning guidance.
Running Pace Calculator
Calculate running pace, finish time, or distance from any two inputs. Supports min/km and min/mile. Includes race split projections for 5K through marathon.
CSS Grid Generator
Build CSS grid layouts visually. Configure columns, rows, gap, and alignment properties with live preview. Copy generated CSS and HTML for any grid layout.
Number Base Converter
Convert numbers between binary, decimal, octal, and hexadecimal. Includes two's complement representation and ASCII character mapping for developer reference.
Dividend Calculator
Calculate dividend yield, annual income, and DRIP compound growth.
Prorated Rent Calculator
Calculate prorated rent for move-in or move-out dates instantly.
Why UtilDaily?
UtilDaily is a growing collection of free, browser-based utilities for developers, designers, and everyday users. Every tool runs 100% client-side using standard Web APIs — your data never leaves your device, and nothing is stored on any server.
No sign-up. No limits. No tracking. Every tool is free to use without creating an account or installing anything. Open a tool, use it, and close the tab — that's it. We believe useful software should be accessible to everyone without friction.
Whether you need to format a messy JSON payload from an API response, encode a string to Base64 for an authorization header, generate a cryptographically random UUID for a database record, or convert a Unix timestamp to a readable date — UtilDaily has a focused tool for each task. Each tool does one thing well rather than trying to be everything at once.
All tools are optimized to load fast and work offline. Because everything runs in your browser, the tools continue to work even without an internet connection once the page has loaded — making them useful in restricted environments, on airplanes, or when working with sensitive data you'd prefer not to send to a remote server.