explainerDeveloper
What is a Unix Timestamp? A Plain-English Guide in 2026
Unix timestamps are just a count of seconds since Jan 1, 1970. Here's what that means, why it matters, and how to convert them instantly.
2026-04-08·6 min read
PublicTools Blog
Guides, Tutorials & Tool Deep-Dives
Practical guides for developers, marketers, and small business owners. No fluff — just useful.
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how-toFinance
How to Calculate Backwards Sales Tax in 2026 — Remove Tax from Any Price
Price already includes tax? Here's how to reverse-calculate the pre-tax amount in seconds — plus a free reverse tax calculator for every US state.
2026-04-01·7 min read
explainerDeveloper
UUID vs GUID: What's the Difference?
UUID and GUID are the same thing with different names. Here's what they actually are, when to use them, and how to generate random uuid in seconds.
2026-03-24·7 min read
explainerDeveloper
What Is Base64 Encoding? A Plain-English Guide
Base64 turns binary data into plain text so it can travel through systems that only accept text. Learn how it works, when to use it, and when not to.
2026-03-23·6 min read
how-toFinance
How to Split Bills Fairly (With Real Examples)
Splitting bills gets awkward fast. Here's how to do it fairly — evenly, by percentage, or based on what each person ordered — with a free calculator.
2026-03-22·7 min read
how-toMarketing
How to Track Campaigns with UTM Parameters
Learn how UTM parameters work and build tracking links in 30 seconds. Free UTM builder included — no signup required.
2026-03-21·2 min read
comparisonDeveloper
JSON vs XML in 2026 — Which Should You Use?
JSON and XML aren't interchangeable. Here's exactly when to use each — with real examples, a clear verdict, and a free JSON formatter.
2026-03-20·9 min read