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How to Add Hreflang in Next.js (App Router)
In the App Router, hreflang comes from alternates.languages returned by generateMetadata, and the canonical must be built from the active locale rather than declared once at module scope.
What Is JSON Minification? Does It Change Data?
Minifying JSON removes every space, tab, and newline that sits between tokens, producing the smallest text that parses to the exact same data.
Image to Base64: How to Encode Images as Data URIs (and When You Actually Should)
Converting an image to base64 turns its binary contents into a text string, usually wrapped in a data URI like data:image/png;base64,iVBORw0KG....
Hreflang vs Canonical: How They Work Together
A canonical tag says "of these near-duplicate URLs, index this one." An hreflang annotation says "these URLs are localized alternates, serve the right one per user." They answer different questions and must not contradict each other.
How Regex Replacement Works, With Backreferences
A regex replacement matches text by pattern and rewrites each match using a replacement string.
How to Generate Random Numbers Online: Ranges, Unique Sets, and When Randomness Actually Matters
A random number generator draws values from a range you define. Set a minimum and maximum, pick how many numbers you want, and choose integers or decimals.
12 Common Hreflang Errors and How to Fix Them
The most common hreflang errors are missing return tags, non-ISO codes like en-UK, relative URLs, a canonical that points across languages, a missing x-default, and mixing implementation methods for the same URLs.
301 vs 302 Redirects in htaccess Explained
When to reach for a 301 and when a 302 is right, why Redirect and RewriteRule are not interchangeable, and how to force HTTPS and a canonical host without building a redirect chain.
How to Calculate Margin, and Why Markup Differs
Margin is profit as a share of the price; markup is profit as a share of the cost. They describe the same profit, they are not equal, and the gap widens as prices rise. How to convert between them and price from a target.