HTML Encoder / Decoder
Escape or unescape HTML entities to prevent XSS.
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Introduction
HTML Encoder / Decoder — Escape or unescape HTML entities to prevent XSS. Enter Mode, Text to get an instant, accurate result.
Formula
Encodes reserved HTML characters (<, >, &, ", ') into their entity equivalents (or decodes entities back to characters).
Step-by-step
- Enter the Mode.
- Enter the Text.
- Click Calculate to see your result instantly.
Real-world example
Example: With Mode = encode, the HTML Encoder / Decoder gives Encoded: <b>Bold</b> & "quoted".
Frequently Asked Questions
Why encode HTML characters?
So user-supplied text displays literally on a web page instead of being interpreted as HTML markup — an important defense against XSS.
Does this cover all HTML entities?
It covers the core reserved characters (<, >, &, quotes) most commonly needed for safe display.
What inputs does the HTML Encoder / Decoder need?
You'll need to provide: Mode, Text. All fields use sensible defaults, so you can see a working example immediately and then adjust the values to match your own numbers.
How accurate is the HTML Encoder / Decoder?
The HTML Encoder / Decoder applies the formula exactly as calculated — Encodes reserved HTML characters (<, >, &, ", ') into their entity equivalents (or decodes entities back to characters). — so results are precise for the inputs you provide. Accuracy depends on entering correct, realistic input values.
Is the HTML Encoder / Decoder free to use?
Yes, the HTML Encoder / Decoder is completely free, requires no signup, and runs instantly in your browser.
About the HTML Encoder / Decoder
The HTML Encoder / Decoder uses a real, verifiable formula — Encodes reserved HTML characters (<, >, &, ", ') into their entity equivalents (or decodes entities back to characters). — so results are accurate every time, not an approximation.