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Browse our complete collection of 313+ free online tools across 19 categories — from finance calculators, SEO analyzers, and developer utilities to text editors, image converters, and AI writing helpers. Every tool runs in your browser with no signup required. Use the category links below to jump to a specific section, or scroll through the full list to discover something new.
Calculate gross, operating, and net profit margins for your business.
Calculate return on investment to evaluate the profitability of your investments.
Calculate compound interest with flexible compounding frequencies and contributions.
Calculate monthly EMI payments for home, car, or personal loans.
Calculate GST-inclusive and GST-exclusive prices with customizable tax rates.
Convert annual salary to hourly wage and vice versa with tax estimates.
Calculate the final price after applying single or multiple discounts.
Calculate tip amounts and split bills evenly among multiple people.
Calculate selling price, cost, or markup percentage for your products.
Find the break-even point where total revenue equals total costs.
Create professional invoices with line items, taxes, and PDF export.
Convert between world currencies using up-to-date exchange rates.
Estimate monthly mortgage payments including principal, interest, and taxes.
Calculate returns on Systematic Investment Plan contributions over time.
Calculate maturity amount and interest on fixed deposits.
Calculate Public Provident Fund maturity value with yearly contributions.
Calculate gratuity amount based on years of service and last drawn salary.
Estimate income tax liability under old and new tax regimes.
Calculate sales tax on purchases for any US state or custom rate.
Add or remove VAT from prices with support for multiple country rates.
Calculate net pay after deductions for taxes, insurance, and retirement.
Calculate asset depreciation using straight-line or declining balance methods.
Calculate your total net worth by listing all assets and liabilities.
Plan your retirement savings and estimate how much you need to retire comfortably.
Calculate the effect of inflation on purchasing power over time.
Calculate profit or loss from stock trades including fees and commissions.
Calculate the Compound Annual Growth Rate of your investments.
Calculate margin and markup for trading, forex, and stock positions.
Estimate monthly payments and total cost for business loans.
Calculate the impact of mutual fund expense ratios on your returns.
Generate a full amortization schedule for any loan with payment breakdowns.
Compare the financial impact of renting versus buying a home.
Generate optimized meta title and description tags for better search rankings.
Analyze keyword frequency and density in your content for SEO optimization.
Create Open Graph meta tags for rich social media previews on Facebook and Twitter.
Generate XML sitemaps to help search engines index your website efficiently.
Create a robots.txt file to control how search engines crawl your site.
Preview how your page will look in Google search results before publishing.
Convert any text into a clean, SEO-friendly URL slug.
Generate canonical link tags to prevent duplicate content issues.
Simulate and visualize redirect chains by entering URLs and status codes manually.
Analyze the heading structure (H1-H6) of any webpage for SEO best practices.
Generate JSON-LD structured data markup for rich search results.
Check the readability score of your content using Flesch-Kincaid and other formulas.
Learn about backlink metrics and manually track your link-building research.
Enter a domain registration date to calculate its age and review WHOIS basics.
Self-assess your site speed with a performance optimization checklist.
Track and organize broken links you find during manual site audits.
Analyze the anchor text distribution of your backlinks for SEO insights.
Build UTM-tagged URLs to track campaign performance in Google Analytics.
Generate customizable QR codes for URLs, text, Wi-Fi, and more.
Generate shareable links for Facebook, Twitter, LinkedIn, and other platforms.
Create favicons in all required sizes from a single image upload.
Create Twitter Card meta tags for rich tweet previews.
Generate hreflang tags for multilingual and multi-regional websites.
Get a detailed readability analysis with grade level and improvement suggestions.
Optimize your page title tags for maximum click-through rate in search results.
Paste HTTP response headers to analyze security and caching directives.
Generate a device-frame mockup preview for any URL — visual placeholder only.
Generate compelling ad copy for Google Ads, Facebook Ads, and social media.
Format, validate, and beautify JSON data with syntax highlighting.
Encode and decode text or files to and from Base64 format.
Encode or decode URLs and query parameters for safe transmission.
Encode or decode HTML entities to prevent XSS and display special characters.
Generate random UUIDs (v4) or sequential UUIDs for databases and APIs.
Test and debug regular expressions with real-time matching and syntax help.
Minify CSS code to reduce file size and improve page load speed.
Minify JavaScript code by removing whitespace, comments, and shortening variables.
Minify HTML code by removing unnecessary whitespace and comments.
Format and beautify SQL queries for better readability and debugging.
Convert JSON arrays to CSV format for spreadsheet import.
Convert CSV data to JSON format for API consumption.
Convert JSON data to XML format with configurable options.
Convert XML documents to JSON format for modern applications.
Convert YAML configuration files to JSON format.
Convert JSON data to YAML format for configuration files.
Write and preview Markdown with live rendering and syntax highlighting.
Build and validate cron expressions with a human-readable schedule preview.
Convert hex color codes to RGB, HSL, and other color formats.
Pick colors and get hex, RGB, HSL values with a visual color wheel.
Convert Unix timestamps to human-readable dates and vice versa.
Decode and inspect JSON Web Token payloads and headers.
Convert HTML code to clean Markdown format.
Convert Markdown text to clean HTML code.
Create beautiful CSS gradients with a visual editor and copy the code.
Design CSS box shadows visually and copy the generated code.
Calculate Unix file permissions in symbolic and numeric notation.
Look up geolocation, ISP, and other details for any IP address.
Parse user agent strings to identify browser, OS, and device details.
Compare two blocks of text or code and highlight the differences.
Count words, characters, sentences, and paragraphs in your text.
Convert text between uppercase, lowercase, title case, sentence case, and more.
Generate placeholder text in paragraphs, sentences, or words.
Remove duplicate lines from your text while preserving order.
Convert any text into a URL-friendly slug with customizable separators.
Reverse any string of text character by character.
Repeat any text or character a specified number of times.
Count the number of lines, blank lines, and non-empty lines in text.
Find and replace text with support for regex and case-sensitive matching.
Sort lines of text alphabetically, numerically, or in reverse order.
Remove extra whitespace, leading/trailing spaces, and blank lines from text.
Convert text to binary code and binary back to readable text.
Convert text to hexadecimal encoding and decode hex back to text.
Convert text characters to their ASCII code values and vice versa.
Generate stylish Unicode text for social media bios and usernames.
Browse and copy emojis by category with a searchable emoji library.
Generate invisible Unicode characters for formatting and special use cases.
Count individual letter frequencies and character distribution in text.
Count the number of sentences and average sentence length in your text.
Count paragraphs and get statistics about paragraph length in your content.
Truncate text to a specified number of words or characters with ellipsis.
Convert numbers to their written word equivalent in multiple languages.
Convert written number words back to their numeric form.
Compare two texts side by side for token, n-gram, and sentence-level similarity.
Check your text for grammar, spelling, and punctuation errors.
Compress JPEG, PNG, and WebP images without visible quality loss.
Resize images to exact dimensions or by percentage while maintaining quality.
Convert images between JPEG, PNG, WebP, GIF, and SVG formats.
Crop images to custom dimensions or predefined aspect ratios.
Convert images to Base64 encoded strings for embedding in HTML and CSS.
Convert Base64 encoded strings back to downloadable image files.
Convert SVG vector files to PNG raster images at any resolution.
Convert PNG images to JPG format with adjustable quality settings.
Convert JPG images to PNG format with transparency support.
Add text or image watermarks to protect your photos and images.
Convert website screenshots to HTML and CSS code.
Generate beautiful color palettes from images or color theory rules.
Extract the dominant colors from any image with hex and RGB values.
Generate placeholder images with custom dimensions, colors, and text.
Flip images horizontally or vertically and rotate to any angle.
Apply filters like grayscale, sepia, blur, and brightness to images.
View and extract EXIF metadata from photos including camera settings and GPS.
Remove solid-color backgrounds from images with a color-pick and tolerance-based browser tool.
Calculate your exact age in years, months, days, hours, and seconds.
Calculate your Body Mass Index and check if you are in a healthy weight range.
Calculate percentages, percentage increase/decrease, and percentage of a number.
Convert between meters, feet, inches, miles, kilometers, and more.
Convert between kilograms, pounds, ounces, grams, and other weight units.
Convert between Celsius, Fahrenheit, and Kelvin temperature scales.
Convert between km/h, mph, m/s, knots, and other speed units.
Convert between square meters, acres, hectares, square feet, and more.
Convert between liters, gallons, cups, milliliters, and other volume units.
Convert between bytes, KB, MB, GB, TB, and other data storage units.
Convert times between major world time zones with a browser-based zone-aware converter.
Calculate the number of days, weeks, months, and years between two dates.
Convert numbers between binary, octal, decimal, and hexadecimal systems.
Convert between Roman numerals and standard Arabic numbers.
Calculate fuel costs for trips based on distance, fuel price, and efficiency.
Calculate electricity consumption costs for appliances and devices.
Calculate daily calorie needs based on age, weight, height, and activity level.
Calculate cumulative and semester GPA with support for different grading scales.
Convert CGPA to percentage and vice versa for different university systems.
Perform advanced mathematical calculations with trigonometry and logarithms.
Add, subtract, multiply, and divide fractions with step-by-step solutions.
Calculate and convert between common aspect ratios for images and video.
Convert between cups, tablespoons, teaspoons, milliliters, and other cooking units.
Convert shoe sizes between US, UK, EU, and other international systems.
Convert between watts, kilowatts, horsepower, and other power units.
Generate strong, random passwords with customizable length and character types.
Check how strong your password is and get suggestions for improvement.
Generate MD5 hash values for text strings and verify file integrity.
Generate SHA-256 cryptographic hashes for secure data verification.
Explore how bcrypt hashing works with this interactive simulation — not for production use.
Review SSL/TLS certificate fields and expiry dates with a browser-based educational checker.
Format and review WHOIS fields with links to live lookup services.
Explore DNS record types and build a reference DNS table in the browser.
Encrypt and decrypt text using AES, DES, and other encryption algorithms.
Generate a customized privacy policy for your website or app.
Generate terms of service pages tailored to your business needs.
Generate HMAC (Hash-based Message Authentication Code) for API authentication.
Generate random numbers within a custom range with various distribution options.
Generate random colors in hex, RGB, and HSL with a visual preview.
Generate random first names, last names, or full names for characters and testing.
Simulate coin flips with heads/tails results and statistics tracking.
Roll virtual dice with customizable number of dice and sides.
Get random inspirational, funny, or motivational quotes.
Create a customizable spinning wheel for decisions, games, and giveaways.
Randomly divide a list of people into balanced teams or groups.
Pick random items from a list for contests, decisions, or sampling.
Get a random yes or no answer to help you make quick decisions.
Generate optimized prompts for ChatGPT, Claude, Midjourney, and other AI tools with templates and best practices.
Rewrite and paraphrase text using rule-based synonym replacement and sentence restructuring.
Generate professional emails from brief descriptions — choose tone, purpose, and format.
Paste meeting notes and get structured summaries with action items, decisions, and key takeaways.
Generate structured blog post outlines with headings, subheadings, and content suggestions from a topic.
Analyze the tone and sentiment of your text — professional, casual, formal, friendly, or persuasive.
Compare your resume text against a job description to find missing keywords and improve ATS compatibility.
Focus timer using the Pomodoro technique — 25-minute work sessions with 5-minute breaks and tracking.
Plan your day with time-blocked scheduling, priority tasks, and a printable daily agenda.
Generate creative ideas for business, content, projects, or startups using combinatorial brainstorming techniques.
Rewrite any paragraph instantly with synonym replacement and sentence restructuring. Get unique, plagiarism-free content in one click.
Fix grammar, spelling, punctuation, and style issues in your text with a comprehensive rule-based checker. Get a grammar score out of 100.
Summarize long articles into concise paragraphs, bullet points, or key sentences using extractive summarization algorithms.
Generate catchy blog, news, social media, email, YouTube, and ad headlines from your topic using proven headline formulas.
Generate compelling product descriptions for e-commerce in any tone and length from key features and product details.
Create catchy brand slogans and taglines from your brand name, industry, and keywords using 200+ proven slogan patterns.
Generate creative story ideas by combining protagonists, settings, conflicts, twists, and stakes across multiple genres.
Paste any code snippet and get a line-by-line explanation with pattern detection for JavaScript, Python, SQL, and more.
Describe what you need in plain English and get a formatted SQL query for MySQL, PostgreSQL, SQLite, and more.
Describe what pattern you want to match in plain English and get a tested regex with code snippets for your language.
Generate harmonious color palettes from a base color using color theory algorithms. Export as CSS variables or Tailwind config.
Generate creative business names from your industry, keywords, and style preference with domain availability hints.
Generate tailored interview questions for any job role, experience level, and question type from 500+ pre-written templates.
Browse 200+ curated ChatGPT prompt templates for writing, coding, marketing, and more. Fill variables and copy.
Generate brandable domain name suggestions from your keywords with .com, .io, and .co variations.
Generate engaging Instagram captions with hashtags, emojis, and call-to-actions from your photo description.
Generate relevant hashtags for Instagram, Twitter, TikTok, and LinkedIn based on your topic or niche.
Write and format Twitter/X threads — split long text into numbered tweets with character count.
Resize images to exact dimensions for Instagram, Facebook, Twitter, LinkedIn, YouTube, and TikTok.
Create eye-catching YouTube thumbnails with text overlays, backgrounds, and templates using Canvas API.
Format LinkedIn posts with bold, italic, line breaks, and special characters for maximum engagement.
Generate creative and professional bios for Instagram, Twitter, LinkedIn, and TikTok profiles.
Calculate social media engagement rate from followers, likes, comments, and shares across platforms.
Find the optimal posting times for each social media platform based on your target audience timezone.
Plan and organize your social media posts in a visual weekly/monthly calendar with export.
Estimate YouTube ad revenue from daily views, CPM range, and engagement rate. See daily, monthly, and yearly earnings.
Estimate TikTok Creator Fund earnings and brand deal rates from views and engagement metrics.
Estimate Instagram sponsorship rates per post based on follower count, engagement rate, and niche.
Generate optimized YouTube tags for your video topic with long-tail keywords, within the 500-character limit.
Upload a YouTube thumbnail and check dimensions, file size, aspect ratio, and resolution against best practices.
Calculate total YouTube watch hours from average view duration and total views. Track progress toward 4000-hour monetization.
Calculate total video length from a list of scenes with durations. Get platform-specific recommendations.
Predict when you will hit YouTube subscriber milestones (1K, 10K, 100K, 1M) based on your current growth rate.
Merge multiple PDF files into one document. Drag to reorder, preview page counts, and download the merged result.
Split a PDF by page range, every N pages, or into equal parts. Download individual files or all as ZIP.
Reduce PDF file size by removing redundant data. See original vs compressed size with percentage reduction.
Create page-sized PNG or JPG previews from PDF page dimensions at 72, 150, or 300 DPI.
Convert multiple images (PNG, JPG, WEBP) into a single PDF with custom page size, orientation, and margins.
Rotate PDF pages by 90, 180, or 270 degrees. Apply rotation to all pages or specific page numbers.
Remove specific pages from a PDF document. Preview page count and select which pages to delete.
Extract likely text from simple PDFs into plain text with a browser-based workflow.
Add password protection to your PDF files. Download as a password-protected ZIP archive.
Convert Word documents (.docx) to PDF format directly in your browser. No upload to servers.
Add text watermarks to every page of a PDF with custom font size, color, opacity, and rotation.
Calculate voltage, current, resistance, and power using Ohm's Law. Enter any two values to find the rest.
Decode 4-band and 5-band resistor color codes to get resistance values, or enter a value to get the color bands.
Calculate the recommended AWG wire size based on current, voltage, distance, and acceptable voltage drop.
Calculate the correct resistor value for LEDs based on supply voltage, LED specs, and series/parallel configuration.
Calculate output voltage or resistor values for a voltage divider circuit with a visual diagram.
Calculate minimum PCB trace width using the IPC-2221 standard based on current, copper weight, and temperature rise.
Calculate your love compatibility score with your partner using a fun name-based algorithm. Shareable results!
Convert your dog's age to human years using modern research-based formulas adjusted by breed size.
Convert your cat's age to human years with veterinary-accurate formulas for indoor and outdoor cats.
Estimate your life expectancy based on age, gender, lifestyle, exercise, diet, and health factors. For entertainment only.
Find your zodiac sign from your date of birth. See your element, ruling planet, and personality traits.
Find your Chinese zodiac animal sign and element from your birth year. See compatible signs.
Calculate your numerology life path and destiny numbers from your name. See the meaning of each number.
Check romantic compatibility between two zodiac signs with detailed scores and explanations.
Generate your personal lucky numbers deterministically from your name and birthday. Great for lottery picks!
See a live countdown to your next birthday in days, hours, minutes, and seconds.
See a live countdown to your retirement date based on your birth date and target retirement age.
Find your exact age in years, months, weeks, days, hours, minutes, seconds, heartbeats, and breaths.
Calculate your Total Daily Energy Expenditure based on age, weight, height, activity level, and BMR formula. Includes macro targets.
Calculate your daily protein, carbs, and fat intake based on calorie goals with preset and custom macro splits.
Estimate your body fat percentage using the US Navy method or BMI-based calculation with category classification.
Find your ideal weight range using Robinson, Miller, Devine, and Hamwi formulas adjusted for frame size.
Calculate your daily water intake based on weight, activity level, climate, and special conditions.
Calculate your estimated due date from LMP, conception date, IVF transfer, or ultrasound with milestone timeline.
Calculate your ovulation date, fertile window, and next period date with a 3-cycle forecast calendar.
Predict your next 6 periods with fertile windows and ovulation dates in a color-coded calendar view.
Calculate your 5 heart rate training zones based on age and resting heart rate with the Karvonen method.
Calculate optimal bedtimes or wake times based on 90-minute sleep cycles for better rest.
Calculate your daily protein needs based on weight, activity level, fitness goal, and diet type.
Calculate running or walking pace, time, or distance. Get splits and estimated race finish times.
Calculate your waist-to-hip ratio and assess health risk category based on WHO guidelines.
Estimate your Blood Alcohol Content using the Widmark formula based on drinks, weight, gender, and time.
Calculate calories burned from 100+ activities using MET values based on duration and body weight.
Calculate cryptocurrency investment profit or loss with entry/exit fees, coins bought, and percentage returns.
Convert between 10+ cryptocurrencies and 8 fiat currencies using live or approximate exchange rates.
Calculate Ethereum gas fees for transfers, swaps, NFT mints, and more with presets and USD conversion.
Calculate crypto mining profitability based on hashrate, power consumption, electricity cost, and pool fees.
Calculate dollar-cost averaging returns over time with periodic investments and compare vs lump sum strategy.
Calculate staking rewards with compound interest for daily, weekly, or monthly compounding periods.
Estimate capital gains tax on crypto trades based on holding period, tax bracket, and short/long term rates.
Convert between 20+ cryptocurrency tokens via USD intermediary with live or approximate rates.
Calculate Amazon FBA fees including referral fee, fulfillment fee, and net profit with size tier detection.
Calculate eBay selling fees including final value fee, promoted listing fee, and payment processing fee.
Calculate Etsy selling fees including listing, transaction, payment processing, and offsite ads fees.
Calculate Shopify per-sale profit, break-even units, and monthly projections based on your plan and costs.
Calculate dropshipping profit per unit accounting for supplier cost, shipping, platform fees, and ad spend.
Compare prices across products by calculating cost per unit, ounce, or gram to find the best value.
Calculate wholesale prices from retail with tiered quantity discounts and margin analysis.
Estimate shipping costs for USPS, UPS, and FedEx based on weight, dimensions, and distance.
Calculate stamp duty and registration charges for India (all states), UK (SDLT), and Australia with band breakdowns.
Calculate gross yield, net yield, cap rate, and monthly cash flow for rental property investments.
Estimate annual property tax by US state or India state using average tax rates with state comparison.
Calculate how much home you can afford using the 28/36 rule based on income, debts, and down payment.
Convert between 18+ land area units including sq ft, sq meters, acres, hectares, bigha, kanal, and more.
Estimate local or long-distance moving costs based on home size, distance, floor level, and special items.
Estimate renovation costs by room type, renovation level, square footage, and location with ROI estimate.
Calculate down payment amount, loan amount, monthly payment, and total interest with PMI assessment.
Estimate total closing costs with itemized breakdown of fees for conventional, FHA, and VA loans.
Calculate weighted grades with dynamic assignment rows, letter grade, GPA, and "what do I need on the final" feature.
Convert between CGPA and percentage for VTU, Mumbai, CBCS 10-point, Anna University, and generic systems.
Calculate total college cost including tuition, room, board, and books with financial aid and loan projections.
Calculate student loan repayment with standard, graduated, and income-driven plans with amortization table.
Create an optimized study schedule based on subject difficulty and exam proximity with daily hour allocation.
Calculate how long it takes to read text based on word count and reading speed. Shows speaking time too.
Calculate speaking duration at slow, average, and fast paces with presentation length recommendations.
Test your typing speed and accuracy with real-time WPM tracking, error highlighting, and skill ranking.
Estimate scholarship amounts based on tuition cost, family income, GPA, and merit level.
Calculate US take-home pay with federal tax brackets, FICA, state tax for all 50 states, and deductions.
Calculate Indian take-home salary from CTC with old/new tax regime, HRA exemption, EPF, and full salary slip.
Quickly convert your CTC to monthly in-hand salary with standard deductions for metro and non-metro cities.
Calculate overtime pay at 1.5x or 2x rates with weekly and monthly projections for regular and OT hours.
Calculate federal and state tax on bonuses using the 22% flat supplemental rate with FICA breakdown.
Calculate self-employment tax (15.3% FICA) with quarterly estimated payment amounts for freelancers.
Calculate your ideal hourly, daily, and monthly freelance rate based on salary goals, expenses, and billable hours.
Calculate HRA exemption amount under Indian tax law based on basic salary, HRA received, rent paid, and city type.
Calculate EPF corpus at retirement with employee/employer contributions, interest rate, and yearly growth projection.
Calculate NPS corpus, lump sum, and estimated monthly pension based on contributions, returns, and annuity split.
Calculate TDS deduction for salary, FD interest, rent, professional fees, and other income types under Indian tax law.
Calculate maternity leave duration and dates for India, US (FMLA), and UK with paid/unpaid week breakdown.