All Free Online Tools
108+ free, privacy-first tools and calculators. Everything runs in your browser — no signup, no uploads, no tracking.
Freelance & Business Tools
View category →Upwork Fee Calc
Calculate exactly how much you'll take home after Upwork fees.
Pomodoro Tracker
Track your work sprints and watch your billable earnings rise.
Rate Calculator
Calculate your ideal hourly rate based on living expenses.
Time Tracker
Simple privacy-first time tracker for freelance projects.
Contract Builder
Generate standard freelance contracts and NDAs.
Payment Fee Calc
Calculate Stripe and PayPal fees for international B2B billing.
SaaS Metrics
Visualize churn rate, LTV, and CAC for subscription apps.
Date Calculator
Calculate exact duration between dates or add/subtract time.
Time Card Calc
Calculate total weekly hours and overtime pay.
Hours Calculator
Calculate exact work hours and convert to payroll decimals.
Invoice Generator
Create and download professional PDF invoices locally.
Budgeting & Personal Finance
View category →Budget Planner
Plan your monthly budget and track expenses.
Salary Calculator
Convert annual salary to hourly, monthly, and after-tax pay.
ADP Paycheck Calculator
Estimate net take-home pay from hourly or salary wages.
Debt Snowball
Calculate the fastest way to pay off multiple debts.
Auto Loan Payoff
Calculate interest savings from extra car loan payments.
Rule of 72
Estimate how long it takes to double your money with compound interest.
CD vs HYSA
Compare interest yields between locked CDs and liquid savings.
Percentage Calc
Calculate increases, decreases, and reverse percentages.
ROI Calculator
Calculate Return on Investment and annualized yield.
Percentage Increase
Calculate exact percentage growth instantly.
Percent Change
Calculate percent change between two values.
Real Estate & Logistics
View category →Square Footage Calc
Calculate total square footage for multiple rooms.
BRRRR Calculator
Analyze real estate investments using the BRRRR strategy.
Wholesale MAO
Maximum Allowable Offer calculator for real estate wholesalers.
House Hacking
Calculate mortgage offset and rental subsidy for multi-unit homes.
Concrete Calculator
Estimate volume and bag requirements for concrete pours.
Freight Calculator
Estimate shipping and freight costs for logistics.
Investment Calculator
Analyze real estate cash flow, Cap Rate, and ROI.
Trading & Risk Calculators
View category →Micro Futures Sizer
Calculate exact position sizes for MES, MNQ, and MYM.
Prop Firm Breakeven
Calculate exactly what you need to pass your evaluation.
Position Size Calc
Standard position size calculator for Forex and Crypto.
Risk/Reward
Visualize risk vs reward ratios for your trades.
Profit Target
Calculate trailing drawdowns and profit targets.
E-commerce & Retail Tools
View category →Dropshipping Margin
Calculate true profit margins including ad spend and fees.
Etsy Profit Calc
Calculate Etsy listing fees, transaction fees, and net profit.
Shipping Cost
Calculate dimensional weight and shipping costs.
Pricing Strategy
Determine the perfect retail price for your products.
ROI Calculator
Calculate Return on Ad Spend (ROAS) and marketing ROI.
Margin Calculator
Calculate profit margins instantly based on cost and revenue.
Amazon FBA vs FBM
Profit margin comparison between Amazon fulfillment methods.
Barcode Generator
Generate high-res UPC, EAN, and Code128 retail barcodes.
SEO & Content Tools
View category →UTM Builder
Generate campaign tracking URLs with proper parameters.
UTM Generator
Format Google Analytics tracking links perfectly.
Keyword ROI
Calculate the actual monetary value of a ranking keyword.
Backlink Analyzer
Check domain authority and link value.
Readability Score
Check your content against the Flesch-Kincaid scale.
Random Word Generator
Generate random English words for brainstorming and naming.
Health & Fitness Calculators
View category →Calorie Calculator
Calculate exactly how many calories you need daily.
Calorie Deficit
Calculate your TDEE and daily calorie target.
BMI Calculator
Check your Body Mass Index score and category.
1RM Calculator
Calculate your one-rep max and get weight tables.
Bench Press Calc
Estimate your bench press max safely.
Sleep Cycle
Optimize bedtime based on 90-minute REM cycles.
BAC Estimator
Estimate blood alcohol levels based on biological factors.
Pregnancy Due Date
Calculate your baby's arrival date and track pregnancy weeks.
Travel & Expat Utilities
View category →N-400 Tracker
Track travel days for US citizenship & physical presence.
Flight Time
Calculate total flight durations including layovers.
Packing List
Generate dynamic packing lists based on destination weather.
Time Zone
Convert between multiple time zones easily.
Currency
Live currency converter with historical rates.
Everyday Utilities & Converters
View category →Name Generator
Generate unique names for startups, fantasy, or babies.
Tip & Split
Calculate tips and split restaurant bills fairly.
Unit Converter
Convert between metric and imperial units for length and weight.
Age Calculator
Calculate your exact age in years, months, and days.
Kitchen Units
Convert volume to weight for perfect baking accuracy.
Gas Cost Calc
Calculate fuel costs and split road trip bills with friends.
Pet Age Calc
Convert dog and cat years to human years with precision.
Tire Size Calculator
Compare two tire sizes and calculate speedometer differences.
Words to Pages
Estimate essay and book page counts from word counts.
Math & Academic Tools
View category →Anagram Solver
Unscramble letters instantly to find valid dictionary words.
Fraction Calculator
Add, subtract, multiply, and divide fractions securely.
Random Number Gen
Generate true random integers within custom ranges.
GPA Calculator
Calculate high school and college GPAs securely.
Integral Calculator
Calculate definite integrals securely with numerical methods.
Privacy & Security Tools
View category →Web Developer Utilities
View category →JSON Formatter
Validate and beautify JSON payloads.
Base64 Encoder
Encode and decode strings or files to Base64.
QR Code Gen
Generate customizable SVG/PNG QR codes.
Regex Tester
Test and debug regular expressions in real-time.
CSS Minifier
Minify and compile CSS styles.
LLM API Cost
Estimate token overhead for OpenAI, Claude, and Gemini.
String Formatter
Instantly convert text to camelCase, snake_case, PascalCase, or kebab-case.
JSON to CSV
Flatten and convert nested JSON objects into tabular CSV data.
Meta Tag Gen
Generate HTML meta tags, Twitter Cards, and Open Graph data.
UUID Generator
Instantly generate bulk v4 UUIDs / GUIDs.
JWT Decoder
Decode JSON Web Tokens securely without sending payloads.
HTML Entity Encoder
Safely encode and decode HTML entities to prevent XSS.
Markdown to HTML
Convert Markdown to clean HTML with live preview and XSS protection.
Text Diff Checker
Compare two text blocks or code snippets to find the exact differences.
Unix Timestamp
Convert Unix epoch times to human-readable dates and vice versa.
IP Subnet Calculator
Calculate network CIDR ranges, broadcast addresses, and usable hosts.
JSON to YAML
Instantly translate JSON configurations into clean, readable YAML.
URL Encoder/Decoder
Safely encode URLs for HTTP parameters or decode percent-encoded strings.
SQL Formatter
Instantly beautify messy SQL queries with perfect indentation.
Media & File Utilities
View category →Meme Generator
Create custom image memes with classic top and bottom text.
PDF Merger
Merge multiple PDFs locally without uploading.
Image Resizer
Batch resize and compress images.
Video Compress
Calculate optimal bitrates for video compression.
Audio Trimmer
Cut and trim MP3 files.
Color Picker
Extract colors from images and convert HEX/RGB.
Social Media Growth Tools
View category →TikTok RPM
Estimate your Creator Rewards Program earnings.
Hashtag Predictor
Generate the best hashtags for your niche.
Engagement Rate
Calculate your true engagement rate across platforms.
Follower Growth
Predict how long it will take to hit your follower goals.
Bio Generator
Create compelling social media bios.
Sponsorship Calc
Calculate fair brand deal rates for YouTube integrations.