Base64 ブログ
Base64エンコーディング、認証、圧縮など、開発者が本当に知っておくべきことについてのチュートリアルと深掘りガイド — 余計なものはなく、役立つコンテンツだけです。
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What Is Base64? A Complete Developer Guide
Everything you need to know about Base64 encoding — how it works, why it exists, the math behind it, common variants, and real-world use cases in web development.
Base64 in HTML: Data URIs, Emails & Embedding
Learn how to use Base64 encoding in HTML for inline images, email templates, SVG graphics, video embeds, and CSS background images — with practical code examples.
Base64 vs URL Encoding: What's the Difference?
Base64 and URL encoding (percent-encoding) serve different purposes in web development. Learn when to use each, how they work, and why you can't substitute one for the other.
How to Validate Base64 Strings (and Why Most Validators Get It Wrong)
Checking if a string 'looks like Base64' is trickier than it seems. Invalid characters, missing padding, URL-safe variants — here's how to validate properly.
HMAC Authentication Explained: A Practical Guide for API Developers
What HMAC actually is, why it's different from plain hashing, and how to use it for webhook verification, API signatures, and JWT tokens — with code you can run.