Practical guides, developer tips, and updates from UtilDaily.
Base64 converts binary data into text-safe characters for transport across systems that only handle ASCII. Learn the math behind it, when to use it, and common pitfalls.
Read moreDiscover UtilDaily — a growing collection of 90+ free, privacy-first online tools. From JSON formatting to calorie calculators, everything runs in your browser with zero data uploads.
Read moreStep-by-step guide to calculating your net pay from gross pay — covering federal income tax brackets, FICA taxes, pre-tax deductions, and a full worked example for a $55,000 salary.
Read moreUnderstand loan amortization — the math behind your monthly payment, why you pay mostly interest at first, how extra payments save thousands, and a 15-year vs. 30-year mortgage comparison.
Read moreUpdated 2026 sales tax rates for all 50 US states — states with no sales tax, highest combined rates, local tax stacking, and a free calculator to find exact tax on any purchase.
Read moreComplete guide to writing checks correctly — the six fields explained, how to write dollar amounts in words, a table of 50 common amounts, security tips, and how to void a check.
Read moreA complete guide to the best free online financial calculators — paycheck, loan, compound interest, sales tax, and more. All run in your browser with no data uploaded.
Read moreThink computers can generate truly random numbers? Think again. Here's the fascinating science behind pseudo-random, true-random, and cryptographically secure random number generators.
Read moreFrom the humble UPC on a candy bar to the QR code on your boarding pass, barcodes are everywhere. This guide explains every major barcode type, when to use each, and how to create them for free.
Read moreYour username is your digital identity. Whether you need a gaming handle, a professional alias, or a cute social media name, this guide covers every strategy for creating a memorable username — plus 50 ideas to get you started.
Read moreWhether you're counting down to a deadline, calculating a loan maturity date, or figuring out how old you are in days, this guide explains exactly how date calculations work — including leap years, business days, and time zones.
Read moreA random word generator is more versatile than you might think. From beating writer's block to building D&D worlds, creating secure passphrases, and running classroom games — here's everything you can do with one.
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