Precision Tools
Built for Everyone
Access free calculators, converters, generators, and developer utilities. No signup required. Fast, secure, and engineered for performance.
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Finance Calculators
10 tools
Unit Converters
12 tools
Generators
10 tools
Text Tools
10 tools
Image Tools
9 tools
Developer Tools
15 tools
Math Tools
8 tools
Date & Time Tools
6 tools
Health Calculators
5 tools
Miscellaneous
4 tools
AI Tools
6 tools
Green & Sustainability
5 tools
Crypto Tools
3 tools
File Converters
10 tools
Startup & VC Tools
10 tools
Popular Tools
Compound Interest Calculator
Calculate how your investments grow over time with compound interest.
Mortgage Calculator
Calculate your monthly mortgage payments and see the full amortization schedule.
Loan Calculator
Calculate loan payments, interest, and payoff schedules for any type of loan.
Tip Calculator
Calculate tips and split bills easily for any restaurant or service.
ROI Calculator
Calculate return on investment for any project or investment.
Currency Converter
Convert between 30+ world currencies with live exchange rates.
Salary Calculator
Convert salary between hourly, daily, weekly, monthly, and annual.
Discount Calculator
Calculate discounts, sale prices, and markups instantly.
Savings Goal Calculator
Calculate how much to save monthly to reach your financial goals.
Investment Calculator
Calculate investment growth with compound interest and contributions.
Password Generator
Generate strong, secure passwords with customizable options.
QR Code Generator
Create QR codes for URLs, text, WiFi, contacts, and more.
UUID Generator
Generate random UUIDs (v4) instantly for your applications.
Lorem Ipsum Generator
Generate placeholder text for your designs and layouts.
Random Number Generator
Generate random numbers within any range instantly.
Word Counter
Count words, characters, sentences, and paragraphs in your text instantly.
Case Converter
Convert text between uppercase, lowercase, title case, and more.
Character Counter
Count characters with and without spaces, perfect for Twitter and meta descriptions.
Text Diff Tool
Compare two texts and highlight the differences between them.
JSON Formatter
Format, validate, and beautify JSON data with syntax highlighting.
CSV to JSON Converter
Convert CSV data to JSON format with custom delimiters and options.
Package Version Checker
Check the latest npm package versions and find outdated dependencies.
DNS Record Checker
Look up DNS records for any domain - A, MX, TXT, CNAME, NS, and more.
Base64 Encoder/Decoder
Encode and decode Base64 strings and files instantly.
URL Encoder/Decoder
Encode and decode URLs with percent-encoding.
JWT Decoder
Decode and inspect JSON Web Tokens without verification.
Regex Tester
Test and debug regular expressions with real-time matching and highlighting.
Color Picker
Pick colors and convert between HEX, RGB, HSL, HSV, and CMYK formats.
Image Resizer
Resize images to exact dimensions or scale by percentage online.
Image Compressor
Compress images to reduce file size while maintaining quality.
BMI Calculator
Calculate your Body Mass Index and see your health category.
BMR Calculator
Calculate your Basal Metabolic Rate to understand daily calorie needs.
Calorie Calculator
Calculate daily calorie needs based on activity level and fitness goals.
Body Fat Calculator
Estimate body fat percentage using the US Navy method or BMI formula.
Percentage Calculator
Calculate percentages, percentage changes, and percentage problems easily.
Scientific Calculator
Perform advanced math calculations with trigonometry, logarithms, and more.
Age Calculator
Calculate your exact age in years, months, and days.
Countdown Timer
Create countdown timers for events, deadlines, and special occasions.
Coin Flip
Flip a virtual coin and get random heads or tails.
Dice Roller
Roll virtual dice with customizable sides and quantity.
Carbon Footprint Calculator
Calculate your personal carbon footprint from daily activities.
EV Charging Calculator
Calculate electric vehicle charging costs and time.
Solar Panel ROI Calculator
Calculate the return on investment for solar panel installation.
LLM Cost Calculator
Calculate and compare costs across different LLM providers.
Token Counter
Count tokens for GPT, Claude, and other language models.
Crypto Portfolio Calculator
Track and calculate your cryptocurrency portfolio value.
Staking Rewards Calculator
Calculate potential staking rewards for various cryptocurrencies.
HEIC to JPG Converter
Convert HEIC/HEIF images from iPhone to JPG format.
YAML to JSON Converter
Convert YAML data to JSON format instantly.
JSON to CSV Converter
Convert JSON arrays to CSV format for spreadsheets.
Temperature Converter
Convert between Celsius, Fahrenheit, and Kelvin instantly.
Burn Rate Calculator
Calculate monthly burn rate, runway, and fundraising timeline for startups.
Pre-Money/Post-Money Calculator
Calculate pre-money and post-money valuations for funding rounds.
SAFE Conversion Calculator
Calculate how SAFEs convert to equity at your priced round.
Startup Dilution Calculator
Model equity dilution across multiple funding rounds.
Employee Stock Option Calculator
Calculate the value of employee stock options with vesting and exit scenarios.
Convertible Note Calculator
Calculate convertible note conversion with interest, caps, and discounts.
SaaS Metrics Calculator
Calculate key SaaS metrics: MRR, ARR, LTV, CAC, churn, and Quick Ratio.
Startup Valuation Calculator
Calculate startup valuation using multiple methods: Multiples, VC, Berkus, Scorecard.
Exit Waterfall Calculator
Calculate how exit proceeds are distributed with liquidation preferences.
Funding Round Scenario Modeler
Compare multiple funding scenarios to optimize valuation and dilution.