All Tools
Browse our complete collection of 88+ free online tools across 15 categories. Find the perfect tool for your needs.
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.
Revenue Split Calculator
Calculate revenue splits for partnerships, royalties, and profit sharing.
Freelancer Rate Calculator
Calculate your ideal hourly or project rate based on expenses and goals.
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.
Color Picker
Pick colors and convert between HEX, RGB, HSL, HSV, and CMYK formats.
WebP Converter
Convert PNG, JPG, and GIF images to WebP format for smaller file sizes.
Image Resizer
Resize images to exact dimensions or scale by percentage online.
Image Compressor
Compress images to reduce file size while maintaining quality.
JSON Formatter
Format, validate, and beautify JSON data with syntax highlighting.
JSON Validator & Formatter
Validate JSON syntax, format, minify, and get detailed statistics.
CSV to JSON Converter
Convert CSV data to JSON format with custom delimiters and options.
YouTube URL Parser
Parse YouTube URLs to extract video ID, playlist ID, timestamps, and more.
Git Command Generator
Generate git commands for commits, branches, merges, stash, and resets.
WireGuard Config Generator
Generate WireGuard VPN server and client configuration files.
Home Assistant Card Generator
Generate YAML configs for Home Assistant dashboard cards.
Code Template Generator
Generate boilerplate code for React, TypeScript, Node.js, and testing.
Web Scraper Generator
Generate web scraper code for Cheerio, Puppeteer, Playwright, and more.
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.
BMI Calculator
Calculate your Body Mass Index and see your health category.
Caffeine Calculator
Calculate caffeine intake and track how long it stays in your system.
Dog Age Calculator
Convert your dog's age to human years with breed-specific calculations.
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.
LLM Cost Calculator
Calculate and compare costs across different LLM providers.
Token Counter
Count tokens for GPT, Claude, and other language models.
Claude API Calculator
Calculate costs for Anthropic Claude API usage.
DeepSeek Calculator
Calculate costs for DeepSeek API and model usage.
Gemini API Calculator
Calculate costs for Google Gemini API usage.
Image Token Calculator
Calculate token costs for image inputs in vision models.
OpenAI o-Series Calculator
Calculate costs for OpenAI o1 and o3 reasoning models.
Carbon Footprint Calculator
Calculate your personal carbon footprint from daily activities.
Carbon Offset Calculator
Calculate how much carbon offset you need for activities and travel.
EV Charging Calculator
Calculate electric vehicle charging costs and time.
Heat Pump Savings Calculator
Calculate potential savings from switching to a heat pump.
Solar Panel ROI Calculator
Calculate the return on investment for solar panel installation.
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 YAML Converter
Convert JSON data to YAML format instantly.
XML to JSON Converter
Convert XML data to JSON format with customizable options.
JSON to CSV Converter
Convert JSON arrays to CSV format for spreadsheets.
WebP to JPG Converter
Convert WebP images to JPG format.
WebP to PNG Converter
Convert WebP images to PNG format with transparency.
SVG to PNG Converter
Convert SVG vector graphics to PNG raster format.
AVIF to JPG Converter
Convert AVIF images to JPG format.
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.