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How to Calculate Your Age in Years, Months, and Days

Learn how to calculate your exact age in years, months and days, why the math gets tricky with leap years, and how to get it instantly with a free age calculator.

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How to Extract URLs and Links from Text Easily

Extract every URL and link from a block of text in seconds. See when link extraction helps with SEO, data cleanup and research, and how to do it with a free tool.

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How to Calculate Compound Interest for Long-Term Wealth

Understand how compound interest works, the formula behind it, and how small regular investments grow over time. Run your own numbers with a free calculator.

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How to Convert Colors Between Hex, RGB, and HSL

A simple guide to HEX, RGB and HSL color codes: what each format is for, how to convert between them, and a free color converter that does it instantly.

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How to Calculate Sales Tax and VAT for E-Commerce

How to calculate US sales tax and EU VAT for online orders, including tax-inclusive and exclusive prices, with worked examples and free calculators.

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How to Create a Professional Resume for Free (No Signup)

Build a professional, ATS-friendly resume for free without creating an account. Tips on layout, sections and wording, plus a free resume builder with PDF download.

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How to Clean and Format Text for Better Readability

Fix text copied from PDFs and websites: remove broken line breaks, extra spaces and stray formatting so it reads cleanly. Includes a free text cleaner.

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How to Convert Units Like a Pro: Length, Weight, and Volume

Convert length, weight and volume between metric and imperial units with confidence. Handy conversion tables, common mistakes to avoid and free unit converters.

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The Best Free Online Tools for Developers in 2026

The best free online developer tools for 2026: formatters, regex testers, JSON converters, cron generators and more, all in the browser with no install.

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How to Calculate ROI for Your Marketing Campaigns (Step-by-Step)

Calculate marketing ROI step by step: the formula, what costs to include, worked examples for ads and email campaigns, and a free ROI calculator.

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