When to reach for HTML Encode/Decode

HTML Encode/Decode does one job instead of burying it in a general-purpose panel: HTML entity encode/decode for markup and text locally. That focus is deliberate, because a markup helper is most useful when it answers a question in a single screen.

When HTML Encode/Decode is the right tool

Markup escaping is a boundary problem: the same characters are safe in one context and dangerous in another.

• Escape user comments before inserting into HTML templates.
• Decode entities from email or CMS exports.
• Prepare snippets for documentation examples.
• Compare encoded output with framework escapers.

Getting a reliable result

Decide which context the output lands in—element text, an attribute, or a URL—because each needs different escaping. Round-trip a sample to confirm that decoding restores exactly what you started with, and never rely on escaping alone as your only defence.

• Encode user-controlled text at the output boundary for your context.
• Use a dedicated sanitizer when rendering untrusted HTML documents.
• Prefer UTF-8 pages so you encode only structural characters when possible.

Mistakes that waste time

• Double-encoding already escaped entities.
• Assuming entity encoding alone prevents all XSS vectors.
• Decoding untrusted HTML and injecting it with innerHTML.
• Confusing HTML entities with URL percent-encoding.

Privacy and local processing

Encoding and decoding run in the browser, so snippets from private templates are never uploaded.

Related tools and reading

Open HTML Encode/Decode to try it with your own input. Nearby utilities include JSON Formatter and Word Counter. For background, read Markdown basics for documentation, and browse the Text Toolkit collection for the rest of the cluster.