Plan your retirement savings. Calculate total savings, inflation-adjusted value, and monthly retirement income based on your contributions and returns.

Debt Payoff Calculator

Calculate how long to pay off debt. See total interest, monthly breakdown, and how extra payments save you time and money.

Unit Price Calculator

Compare up to 5 products side by side. Calculate price per unit to find the best value and see how much you save.

Payroll Calculator

Calculate net pay from gross salary. Estimate taxes, deductions, and take-home pay by pay period.

Simple Interest Calculator

Calculate simple interest on loans or savings using the formula SI = P × R × T.

Auto Loan Calculator

Calculate monthly car loan payments, total interest, and amortization schedule.

Tax Bracket Calculator

Calculate your federal income tax by bracket. See effective and marginal tax rates.

Savings Goal Calculator

Plan your savings strategy. Set a goal amount and see how much to save monthly to reach it.

Tip Splitting Calculator

Split bills and tips among friends. Calculate each person's share with custom tip percentages.

Life Insurance Calculator

Calculate how much life insurance coverage you need based on income, debts, and dependents.

Car Insurance Calculator

Estimate your car insurance premium based on vehicle details, driver profile, and coverage preferences.

Home Insurance Calculator

Estimate your homeowners insurance premium based on property value, location, and coverage needs.

Health Insurance Calculator

Estimate monthly health insurance premiums based on age, family size, plan type, and income.

Disability Insurance Calculator

Calculate disability insurance coverage needs and estimated premiums based on income and occupation.

Renters Insurance Calculator

Estimate your renters insurance premium based on personal property value and coverage needs.

Pet Insurance Calculator

Estimate pet insurance costs based on pet type, age, breed, and coverage level.

Travel Insurance Calculator

Estimate travel insurance costs based on trip cost, destination, duration, and coverage type.

Umbrella Insurance Calculator

Calculate recommended umbrella insurance coverage based on assets, income, and risk factors.

Business Insurance Calculator

Estimate business insurance premiums based on revenue, employees, industry, and coverage type.

Flood Insurance Calculator

Estimate flood insurance premiums based on property value, flood zone, and elevation.

Motorcycle Insurance Calculator

Estimate motorcycle insurance premiums based on bike value, engine size, and rider experience.

Boat Insurance Calculator

Estimate boat insurance premiums based on boat value, type, length, and usage.

Dental Insurance Calculator

Estimate dental insurance costs and savings based on expected dental procedures and coverage type.

Vision Insurance Calculator

Estimate vision insurance costs and savings for eye exams, glasses, and contact lenses.

Long-Term Care Insurance Calculator

Estimate long-term care insurance premiums based on age, coverage amount, and benefit period.

Critical Illness Insurance Calculator

Estimate critical illness insurance premiums for coverage against cancer, heart attack, and stroke.

Wedding Insurance Calculator

Estimate wedding insurance premiums based on total wedding budget and coverage needs.

Jewelry Insurance Calculator

Estimate jewelry insurance premiums based on appraised value and coverage type.

GAP Insurance Calculator

Calculate GAP insurance coverage to bridge the difference between car value and loan balance.

FIRE Number Calculator

Calculate your Financial Independence Retire Early (FIRE) number and years to reach it.

Net Worth Calculator

Calculate your total net worth by adding assets and subtracting liabilities.

Emergency Fund Calculator

Calculate how much you need in your emergency fund based on monthly expenses and employment type.

Capital Gains Tax Calculator

Calculate capital gains tax on investments including federal and state tax rates.

Self-Employment Tax Calculator

Calculate self-employment tax, income tax, and quarterly estimated payments for freelancers.

Estate Tax Calculator

Estimate federal estate tax liability based on total estate value, deductions, and exemptions.

Social Security Calculator

Estimate your Social Security retirement benefits based on earnings history and retirement age.

Insurance Deductible Calculator

Compare insurance deductible options and calculate potential savings from higher deductibles.

HSA Calculator

Project your Health Savings Account growth with tax savings and investment returns over time.

401(k) Calculator

Project your 401(k) retirement savings with employer matching, contributions, and investment growth.

Text

Word Counter

Count words, characters, sentences, and paragraphs in your text instantly.

Lorem Ipsum Generator

Generate lorem ipsum placeholder text paragraphs for your designs and mockups.

Text Case Converter

Convert text between uppercase, lowercase, title case, camelCase, kebab-case and more.

Character Counter

Detailed character analysis: vowels, consonants, digits, spaces, special characters and more.

Text to Slug

Convert any text to a URL-friendly slug. Removes accents, special characters, spaces to hyphens.

Markdown Preview

Write markdown on the left, see rendered HTML on the right. Live preview.

HTML Encoder

Encode and decode HTML entities. Convert special characters to HTML entities and back.

Text Diff

Compare two texts side by side and highlight the differences line by line.

Typing Speed Test

Test your typing speed in words per minute (WPM) with real-time accuracy tracking and detailed performance stats.

Character Map

Browse and copy Unicode characters, symbols, emojis with code details.

Text to Speech

Convert text to speech using your browser. Adjust voice, speed and pitch.

Grammar Checker

Check your text for spelling, grammar and style errors. Get instant suggestions and fix mistakes with one click.

Resume Builder

Create professional resumes with multiple templates, color themes, and export options. Free, no signup.

AI Text Detector

Analyze text for AI-generated patterns. Heuristic checks for sentence uniformity, vocabulary diversity, and more.

Text Repeater

Repeat any text up to 10,000 times with custom separators, line numbers, and reverse options.

Emoji Picker

Search, browse and copy emojis by category. View emoji names, Unicode code points and HTML entities.

Word Frequency Counter

Analyze word frequency in any text. See counts, percentages, bar chart, and export as CSV.

Line Counter

Count total lines, blank lines, non-blank lines. See longest/shortest line and average line length.

Note Taking

Simple online notepad with multiple tabs, auto-save, search, word count, and export options.

Flashcard Maker

Create flashcards with front and back. Study mode with reveal, shuffle, and track known vs unknown. Multiple decks, localStorage save, import/export JSON.

Font Identifier

Preview and compare 30+ fonts. Type sample text, adjust size, spacing, and color. Side-by-side font comparison with CSS code copy.

Reading Time Calculator

Estimate how long it takes to read any text. Paste your content and get instant reading time.

Health & Lifestyle

BMI Calculator

Calculate your Body Mass Index (BMI) and find out your weight category with metric and imperial units.

Calorie Calculator

Calculate your daily calorie needs based on age, gender, weight, height and activity level using the Mifflin-St Jeor equation.

Body Fat Calculator

Estimate your body fat percentage using the U.S. Navy method with simple measurements.

Ideal Weight Calculator

Calculate your ideal weight range based on height, age, and gender using multiple formulas.

Water Intake Calculator

Calculate your recommended daily water intake based on weight, activity, and climate.

Sleep Calculator

Calculate optimal bedtime or wake time based on 90-minute sleep cycles.

Pregnancy Calculator

Calculate your due date from last menstrual period or conception date with trimester timeline.

Pace Calculator

Calculate running or walking pace, finish time, or distance with split times.

Breathing Exercise

Guided breathing timer with animated visuals. Preset patterns: 4-7-8 Relaxation, Box Breathing, Calm and Energizing modes.

Noise Generator

Generate white, pink, and brown noise for focus, sleep, and relaxation. Mix types, set timers, and visualize waveforms.

Blood Pressure Tracker

Track and classify your blood pressure readings. Log history, view charts, calculate averages, and export CSV.

TDEE Calculator

Calculate your Total Daily Energy Expenditure based on age, weight, height, and activity level.

Macro Calculator

Calculate your daily macronutrient needs: protein, carbs, and fat based on your goals.

Ovulation Calculator

Calculate your fertile window and estimated ovulation date based on your menstrual cycle.

Blood Alcohol Calculator

Estimate your blood alcohol content (BAC) based on weight, drinks, and time.

Bra Size Calculator

Find your perfect bra size using band and bust measurements. Convert between US, UK, and EU sizes.

Heart Rate Zone Calculator

Calculate your heart rate training zones based on your max heart rate or resting heart rate.

Conversion

Unit Converter

Convert between units of length, weight, temperature and speed. Metric to imperial and more.

Base64 Converter

Encode or decode Base64 strings instantly. Convert text to Base64 and back.

Time Zone Converter

Convert time between different time zones worldwide. Quick and accurate.

Cooking Converter

Convert between cooking measurements: cups, tablespoons, teaspoons, ml, oz, grams.

CSV to JSON

Convert CSV data to JSON format and vice versa. Paste and convert instantly.

JSON to CSV

Convert JSON arrays to CSV format. Flatten nested objects, choose delimiters, and download results.

URL Encoder/Decoder

Encode or decode URLs and query strings for safe web use.

JPG to PDF

Convert multiple images (JPG, PNG, WebP) to a single PDF document. Reorder, configure page size and orientation.

PDF to JPG

Convert images (PNG, WebP, BMP, GIF, SVG, TIFF) to JPG format. Batch conversion with quality control, entirely in your browser.

Word to PDF

Convert text to PDF with formatting options. Rich text editor with bold, italic, headings, lists and alignment. Choose page size, orientation and margins.

Number to Words

Convert any number to its written form in English. Supports decimals, negatives, ordinals, and currency mode.

Temperature Converter

Convert between Celsius, Fahrenheit, Kelvin and Rankine instantly. Visual thermometer, formulas and reference points.

PDF Merge

Merge multiple images into a single PDF document. Upload images, reorder pages, choose orientation, and download the combined PDF.

PDF Compress

Compress images and export as a lightweight PDF. Adjust quality, preview compression results, and download an optimized PDF file.

Image to Text

Analyze images to extract dimensions, file info, and dominant color palette. Upload any image to get detailed metadata and color analysis.

Text to Morse

Convert text to Morse code and Morse code back to text. Visual dots and dashes display, audio playback with speed control, supports letters, numbers and punctuation.

HTML to Markdown

Convert HTML to Markdown instantly. Supports headings, links, images, lists, tables, code blocks and more.

World Clock

View current time in multiple time zones simultaneously. Add custom timezones, toggle 12h/24h format, see UTC offsets.

Shoe Size Converter

Convert shoe sizes between US, UK, EU, and CM. Find your perfect shoe size in any system.

Developer

JSON Formatter

Format, validate and beautify JSON data. Minify or pretty-print JSON.

Color Picker

Pick colors and convert between HEX, RGB, and HSL formats.

Password Generator

Generate strong, secure random passwords with custom length, uppercase, lowercase, numbers and symbols.

QR Code Generator

Generate QR codes from text, URLs, WiFi, vCards and more. Customize colors and size, then download as PNG image.

Barcode Generator

Generate Code 128 barcodes from text. Customize and download as PNG.

Screen Resolution

Display your screen resolution, viewport size, pixel ratio, orientation and more.

Screen Recorder

Record your screen directly in the browser. Start, stop, pause recording with video preview and WebM download.

Regex Tester

Test regular expressions with real-time matching, highlighting and group capture.

Hex Converter

Convert between decimal, hexadecimal, binary and octal number systems.

Hash Generator

Generate MD5, SHA-1, SHA-256 and SHA-512 hashes from any text input.

Binary Converter

Convert between binary, decimal, hexadecimal, and octal number systems.

Binary Translator

Translate text to binary code and binary code to text. Also shows octal and decimal representations.

Color Converter

Convert colors between HEX, RGB, and HSL formats with live preview.

IP Lookup

Display your public IP address with geolocation info including city, country, and ISP.

Cron Expression Generator

Generate and explain cron expressions visually with presets and next run preview.

Timestamp Converter

Convert Unix/Epoch timestamps to human-readable dates and vice versa. Live current timestamp, multiple formats, relative time.

Color Palette Generator

Generate beautiful color palettes with harmony modes, contrast checking, and CSS export.

Internet Speed Test

Check your connection info, downlink speed, latency, IP address and network type with visual speed gauge.

Keyboard Tester

Test every key on your keyboard. Visual keyboard layout highlights pressed keys, shows key codes, and tracks total keypresses.

Mic Test

Test your microphone online. Check volume levels, view waveform, record a test clip, and verify your mic works before calls or recordings.

Webcam Test

Test your webcam online. Live video preview, take snapshots, check resolution and FPS, mirror toggle. Verify camera works before video calls.

Gradient Generator

Create beautiful CSS gradients visually. Choose linear or radial, add color stops, adjust angles, preview live, and copy CSS code.

XML Formatter

Format, validate, beautify and minify XML data. Pretty-print with configurable indentation or compress XML.

JS Minifier

Minify JavaScript code by removing comments, whitespace, and newlines. See size savings, copy output, and download as .min.js.

WiFi QR Generator

Generate a QR code for your WiFi network. Guests scan to connect instantly. Supports WPA/WPA2, WEP, and open networks.

CSS Minifier

Minify and beautify CSS code online. Remove comments, whitespace, and optimize stylesheets for production.

Color Contrast Checker

Check WCAG 2.1 color contrast ratios. Get Pass/Fail badges for AA and AAA levels with accessible alternatives.

Text Encryptor

Encrypt and decrypt text with AES-256-GCM. Password-based encryption using PBKDF2 key derivation, entirely in your browser.

Subnet Calculator

Calculate network address, broadcast address, host range and more from IP and subnet mask.

SQL Formatter

Format and beautify SQL queries. Supports SELECT, INSERT, UPDATE, DELETE and more.

YAML Formatter

Format, validate, and beautify YAML. Convert between YAML and JSON formats.

Math

Age Calculator

Calculate your exact age in years, months and days. See total days lived and countdown to next birthday.

Speed Calculator

Calculate speed, distance or time from any two values. Simple and quick.

Date Calculator

Calculate days between two dates or add/subtract days from a date.

Random Number Generator

Generate random numbers with min, max, quantity options and no-duplicate mode.

Aspect Ratio Calculator

Calculate height for common aspect ratios (16:9, 4:3, 1:1, 21:9) or enter a custom ratio.

Grade Calculator

Enter grades with weights to calculate weighted average and GPA.

Countdown Timer

Set a target date and see a live countdown in days, hours, minutes and seconds.

Fraction Calculator

Add, subtract, multiply and divide fractions with step-by-step solutions.

GPA Calculator

Calculate your Grade Point Average from courses, credits, and letter grades.

Scientific Calculator

Full-featured scientific calculator with trigonometry, logarithms, and advanced functions.

Stopwatch

Online stopwatch with lap times, split tracking, and millisecond precision.

Percentage Change Calculator

Calculate percentage increase or decrease between two values instantly.

Pomodoro Timer

Focus timer using the Pomodoro Technique: 25-minute work sessions with short and long breaks.

Habit Tracker

Track daily and weekly habits with streaks, calendar heatmap, and completion stats. Build better routines visually.

Standard Deviation Calculator

Calculate standard deviation, variance, mean, median, and more. Enter numbers and get complete statistical analysis instantly.

Matrix Calculator

Perform matrix operations: add, subtract, multiply, transpose, determinant, and scalar multiply. Support for 2x2 and 3x3 matrices.

Probability Calculator

Calculate probabilities for single events, combined events, conditional probability, and permutations/combinations with step-by-step formulas.

Chart Maker

Create bar, line, and pie charts from your data. Enter label:value pairs, customize colors and titles, then download as PNG.

Area Calculator

Calculate the area of any shape: circle, rectangle, triangle, trapezoid, ellipse, parallelogram. With formulas, SVG preview, and unit conversion.

Binary Calculator

Perform binary operations: AND, OR, XOR, NOT, addition and subtraction with bit visualization and step-by-step results.

Volume Calculator

Calculate volume and surface area of 3D shapes: cube, rectangular prism, sphere, cylinder, cone, pyramid. Multiple units.

Roman Numeral Converter

Convert between Roman numerals and decimal numbers. Supports values 1-3999 with input validation, reference table, and conversion history.

Square Root Calculator

Calculate square roots, cube roots, and nth roots of any number with precision control.

Pythagorean Theorem Calculator

Calculate the missing side of a right triangle using a² + b² = c². Find area and perimeter too.

Quadratic Equation Solver

Solve quadratic equations ax² + bx + c = 0. Get real and complex roots with step-by-step solution.

Images

Image Compressor

Compress images client-side. Upload, adjust quality, download compressed image.

Image Resizer

Resize images to exact dimensions, by percentage, or social media presets. Client-side processing, no uploads.

Photo Editor

Edit photos in your browser. Adjust brightness, contrast, apply filters, rotate, flip, crop and download.

Pixel Ruler

Measure pixel distances on screen with an interactive ruler and manual calculator.

Meme Generator

Create custom memes with top and bottom text. Upload images or use templates. Adjust font, colors, alignment and download as PNG.

Pixel Art Maker

Create pixel art in your browser. Draw, erase, fill, undo, and download as PNG. Grid sizes: 8x8, 16x16, 32x32.

Background Remover

Remove image backgrounds with one click. Click on the background color to make it transparent. Adjust tolerance, preview result, and download as PNG.

SVG to PNG

Convert SVG to PNG image. Upload or paste SVG code, choose scale, background color, and download high-quality PNG.

Whiteboard

Free online whiteboard with brush, eraser, colors, undo, grid and PNG download.

Placeholder Image Generator

Generate custom placeholder images with custom dimensions, colors, and text. Download as PNG/JPEG or copy as base64 data URL.

Photo Collage Maker

Create beautiful photo collages online. Choose layouts, add photos, and download your collage.

Energy & Green

Solar Panel ROI Calculator

Calculate the return on investment for your solar panel installation over 25 years.

Solar Savings Calculator

Estimate how much you can save on electricity bills with solar panels based on your roof and usage.

EV vs Gas Cost Calculator

Compare the total ownership cost of an electric vehicle vs a gas car including fuel and maintenance.

Carbon Footprint Calculator

Calculate your annual carbon footprint from electricity, gas, car, and air travel.

Heat Pump Savings Calculator

Calculate annual savings from switching to a heat pump for home heating and cooling.

Solar Battery Size Calculator

Calculate the battery storage capacity you need for your solar energy system.

Wind Turbine Calculator

Calculate energy production, savings, and payback period for a residential wind turbine.

EV Charging Cost Calculator

Compare home vs public EV charging costs and calculate annual charging expenses.

EV Range Calculator

Estimate real-world electric vehicle range based on battery size, efficiency, and conditions.

EV Savings Calculator

Calculate total savings from switching to an electric vehicle including fuel, maintenance, and incentives.

Electric Bike Savings Calculator

Calculate savings from commuting by e-bike instead of car including fuel and payback period.

Home Energy Audit Calculator

Analyze your home energy costs and identify potential savings based on home size and age.

Insulation ROI Calculator

Calculate the return on investment from home insulation upgrades including payback period.

LED Lighting Savings Calculator

Calculate savings from switching to LED bulbs including energy reduction and payback period.

Smart Thermostat Savings Calculator

Calculate savings from installing a smart thermostat for your home HVAC system.

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Why Choose ToolKit Online?

ToolKit Online is a comprehensive collection of over 143 free online tools designed to simplify your everyday tasks. Whether you need to calculate a loan payment, convert units, format JSON, generate a strong password, or compress an image, our tools are built to be fast, accurate, and easy to use. Every tool runs entirely in your browser, which means your data never leaves your device — ensuring complete privacy and instant results.

Our platform is organized into seven intuitive categories: Finance, Text, Health & Lifestyle, Conversion, Developer, Math, and Images. Each tool comes with detailed guides, frequently asked questions, and related tool suggestions to help you find exactly what you need. Available in six languages — English, Italian, Spanish, French, German, and Portuguese — ToolKit Online serves users worldwide without barriers.

We believe essential digital tools should be free and accessible to everyone. That is why ToolKit Online requires no registration, no downloads, and no hidden fees. Our tools are continuously updated and improved based on user feedback, and new tools are added regularly. Bookmark us and come back whenever you need a reliable online utility.