All Utilities

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• Open Color Converter

  Color Converter Design

  Convert CSS colors between hex, RGB, HSL, OKLCH, and Lab formats.

• Open Compound Interest Calculator

  Compound Interest Calculator Finance

  Project investment growth from a starting balance, recurring contributions, annual return, compounding frequency, and contribution increases.

• Open Credit Card Payoff Calculator

  Credit Card Payoff Calculator Finance

  Compare snowball and avalanche payoff plans across one or more credit cards.

• Open Cron Expression Tool

  Cron Expression Tool Developer

  Explain cron expressions in plain English, preview upcoming runs, and generate Unix, seconds, or Quartz cron schedules.

• Open CSV Cleaner

  CSV Cleaner Documents

  Clean messy CSV files with deduping, text normalization, whitespace cleanup, encoding repair, and more.

• Open Debt-to-Income Ratio Calculator

  Debt-to-Income Ratio Calculator Finance

  Calculate front-end and back-end debt-to-income ratios from gross income, housing costs, and recurring debt payments.

• Open Email Authentication Checker

  Email Authentication Checker Marketing

  Check SPF, DKIM, DMARC, and MX DNS records for a domain to find email authentication and deliverability issues.

• Open Email Subject Line Tester

  Email Subject Line Tester Marketing

  Preview your email subject line in various inbox sizes and score length, readability, punctuation, spam-risk words, and clear value.

• Open Favicon Generator

  Favicon Generator Design

  Generate a complete favicon package for your website from a single image, including browser icons, touch icons, and install-ready metadata.

• Open FIRE Milestone Calculator

  FIRE Milestone Calculator Finance

  Map your progress towards various FIRE milestones including coast FIRE, barista FIRE, lean FIRE, fat FIRE, and more.

• Open FIRE Monte Carlo Simulator

  FIRE Monte Carlo Simulator Finance

  Test your FIRE plan with Monte Carlo and rolling historical retirement simulations using stocks, bonds, cash, inflation, and flexible withdrawal strategies.

• Open Game Scorekeeper

  Game Scorekeeper Games

  Track player scores for board games, card games, party games, and casual competitions.