What does RSS 2.0 require at the channel level?
A element with , <link>, and <description> — these three are mandatory per the RSS 2.0 specification, regardless of how many (or few) <item> entries the feed contains.</p></div><div class="space-y-2"><h3 class="font-medium text-foreground text-base">What does Atom require that RSS doesn't?</h3><p class="text-sm">Atom requires <id> and <updated> on both the feed itself and every <entry> — RSS has no direct equivalent to <id> (its closest analog, <guid>, is optional) and no requirement for a document-level 'updated' timestamp.</p></div><div class="space-y-2"><h3 class="font-medium text-foreground text-base">Why does an RSS item need either <link> or <guid>?</h3><p class="text-sm">Feed readers use one of these to uniquely identify and deduplicate items across fetches — without either, a reader can't reliably tell if an item you've already shown up before is the 'same' item on a later fetch.</p></div><div class="space-y-2"><h3 class="font-medium text-foreground text-base">Why does pubDate format matter?</h3><p class="text-sm">RSS 2.0 specifies pubDate should be in RFC 822 date format (like 'Mon, 01 Jun 2026 09:00:00 GMT'). A malformed date can cause some feed readers to sort items incorrectly or fail to parse the date at all, falling back to 'unknown date'.</p></div><div class="space-y-2"><h3 class="font-medium text-foreground text-base">Is my feed content uploaded anywhere?</h3><p class="text-sm">No, validation runs entirely in your browser using the native DOMParser XML engine — no upload.</p></div></div></div></article><section class="max-w-4xl mx-auto px-4 py-12 border-t border-muted"><div class="flex items-center justify-between mb-8"><h2 class="text-2xl font-bold text-foreground">Related Tools</h2><a class="text-sm font-medium text-primary hover:underline flex items-center gap-1" href="/developer">View all <!-- -->developer<!-- --> tools <svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-arrow-right h-4 w-4" aria-hidden="true"><path d="M5 12h14"></path><path d="m12 5 7 7-7 7"></path></svg></a></div><div class="grid gap-4 sm:grid-cols-2"><a class="group" href="/developer/json-formatter"><div data-slot="card" data-size="default" class="group/card flex flex-col gap-4 rounded-xl bg-card py-4 text-sm text-card-foreground ring-1 ring-foreground/10 has-data-[slot=card-footer]:pb-0 has-[>img:first-child]:pt-0 data-[size=sm]:gap-3 data-[size=sm]:py-3 data-[size=sm]:has-data-[slot=card-footer]:pb-0 *:[img:first-child]:rounded-t-xl *:[img:last-child]:rounded-b-xl h-full border-muted/50 hover:border-primary/50 hover:bg-muted/5 transition-all duration-300 overflow-hidden"><div data-slot="card-content" class="group-data-[size=sm]/card:px-3 p-5 flex items-start justify-between"><div class="space-y-1"><h3 class="font-semibold text-foreground group-hover:text-primary transition-colors">JSON Formatter</h3><p class="text-xs text-muted-foreground line-clamp-1">Clean and validate JSON data.</p></div><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-arrow-right h-4 w-4 text-muted-foreground/30 group-hover:text-primary transition-colors group-hover:translate-x-1" aria-hidden="true"><path d="M5 12h14"></path><path d="m12 5 7 7-7 7"></path></svg></div></div></a><a class="group" href="/developer/jwt-decoder"><div data-slot="card" data-size="default" class="group/card flex flex-col gap-4 rounded-xl bg-card py-4 text-sm text-card-foreground ring-1 ring-foreground/10 has-data-[slot=card-footer]:pb-0 has-[>img:first-child]:pt-0 data-[size=sm]:gap-3 data-[size=sm]:py-3 data-[size=sm]:has-data-[slot=card-footer]:pb-0 *:[img:first-child]:rounded-t-xl *:[img:last-child]:rounded-b-xl h-full border-muted/50 hover:border-primary/50 hover:bg-muted/5 transition-all duration-300 overflow-hidden"><div data-slot="card-content" class="group-data-[size=sm]/card:px-3 p-5 flex items-start justify-between"><div class="space-y-1"><h3 class="font-semibold text-foreground group-hover:text-primary transition-colors">JWT Decoder</h3><p class="text-xs text-muted-foreground line-clamp-1">Inspect JSON Web Tokens.</p></div><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-arrow-right h-4 w-4 text-muted-foreground/30 group-hover:text-primary transition-colors group-hover:translate-x-1" aria-hidden="true"><path d="M5 12h14"></path><path d="m12 5 7 7-7 7"></path></svg></div></div></a><a class="group" href="/developer/base64-tool"><div data-slot="card" data-size="default" class="group/card flex flex-col gap-4 rounded-xl bg-card py-4 text-sm text-card-foreground ring-1 ring-foreground/10 has-data-[slot=card-footer]:pb-0 has-[>img:first-child]:pt-0 data-[size=sm]:gap-3 data-[size=sm]:py-3 data-[size=sm]:has-data-[slot=card-footer]:pb-0 *:[img:first-child]:rounded-t-xl *:[img:last-child]:rounded-b-xl h-full border-muted/50 hover:border-primary/50 hover:bg-muted/5 transition-all duration-300 overflow-hidden"><div data-slot="card-content" class="group-data-[size=sm]/card:px-3 p-5 flex items-start justify-between"><div class="space-y-1"><h3 class="font-semibold text-foreground group-hover:text-primary transition-colors">Base64 Tool</h3><p class="text-xs text-muted-foreground line-clamp-1">Encode or decode Base64 data.</p></div><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-arrow-right h-4 w-4 text-muted-foreground/30 group-hover:text-primary transition-colors group-hover:translate-x-1" aria-hidden="true"><path d="M5 12h14"></path><path d="m12 5 7 7-7 7"></path></svg></div></div></a><a class="group" href="/developer/sql-formatter"><div data-slot="card" data-size="default" class="group/card flex flex-col gap-4 rounded-xl bg-card py-4 text-sm text-card-foreground ring-1 ring-foreground/10 has-data-[slot=card-footer]:pb-0 has-[>img:first-child]:pt-0 data-[size=sm]:gap-3 data-[size=sm]:py-3 data-[size=sm]:has-data-[slot=card-footer]:pb-0 *:[img:first-child]:rounded-t-xl *:[img:last-child]:rounded-b-xl h-full border-muted/50 hover:border-primary/50 hover:bg-muted/5 transition-all duration-300 overflow-hidden"><div data-slot="card-content" class="group-data-[size=sm]/card:px-3 p-5 flex items-start justify-between"><div class="space-y-1"><h3 class="font-semibold text-foreground group-hover:text-primary transition-colors">SQL Formatter</h3><p class="text-xs text-muted-foreground line-clamp-1">Beautify your SQL queries.</p></div><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-arrow-right h-4 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