Use Go’s html.UnescapeString() function to convert HTML-encoded strings (like

use go’s html.unescapestring() function to convert html-encoded strings (like , <code>") back into their original characters (like , <code>"). it’s safe, standard, and handles all common entities—including nested or malformed ones—without manual regex or string replacement.

When working with HTML content that arrives as an escaped string—such as from user input, API responses, or templating systems—you’ll often encounter entities like , <code>>, ", ', and &. These are not literal angle brackets or quotes but HTML escape sequences meant to prevent injection or parsing errors.

In Go, the cleanest and most robust way to reverse this encoding is using the html.UnescapeString function from the golang.org/x/net/html package (note: it's not in the standard html package — a common point of confusion).

✅ Correct import and usage:

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package main

import (
    "fmt"
    "golang.org/x/net/html"
)

func main() {
    test1 := `<iframe src="https://www.disnei.com/embed/44bc40f3bc04f65b7a35" frameborder="0" width="100%" height="340" scrolling="no" allowfullscreen></iframe>`

    unescaped := html.UnescapeString(test1)
    fmt.Println(unescaped)
    // Output:
    // <iframe src="https://www.disnei.com/embed/44bc40f3bc04f65b7a35" frameborder="0" width="100%" height="340" scrolling="no" allowfullscreen></iframe>
}

⚠️ Important notes:

• Don’t use strings.ReplaceAll() or regex-based “quick fixes” — they’re error-prone and fail on edge cases (e.g., < → → <code> requires two passes).
• The html.UnescapeString function correctly handles double-escaping, numeric entities (), named entities (<code> ), and even partial/broken sequences safely.
• If you're using Go 1.21+, ensure your go.mod includes the required dependency:

  go get golang.org/x/net/html

• This function only decodes entities — it does not sanitize or validate HTML. Never insert untrusted, unescaped HTML directly into templates or innerHTML; always pair decoding with proper sanitization (e.g., using bluemonday or golang.org/x/net/html parsers) if rendering in browsers.

In summary: for reliable, one-step HTML entity decoding in Go, reach for golang.org/x/net/html.UnescapeString. It’s the idiomatic, battle-tested solution — no workarounds, no backslashes, no surprises.

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