Nirmion
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Developer & Data

HTML Entity Encoder

Encode HTML-sensitive characters and optionally represent non-ASCII code points numerically.

  1. 01Runs in this browser
  2. 02Limits are explicit
  3. 03Copy or download output

Step 1

Set up the source

Choose whether readable non-ASCII text should remain or become hexadecimal numeric references.

Confirming the published workspace...

No black box

How this tool handles the input

The five HTML-sensitive characters are replaced with entities. Optional non-ASCII mode walks Unicode code points and writes hexadecimal references.

Before you start

What you need

Plain text that must be represented safely as text inside HTML markup.

What you get

What the page gives back

Entity-encoded text ready to copy or download.

Keep in mind

Use the result responsibly

Entity encoding is contextual and is not a full sanitizer. Attribute, URL, CSS, and JavaScript contexts need their own safe APIs.

Practical uses

Where this tool earns its place

  1. Display angle brackets as literal text.
  2. Prepare a code example for HTML.
  3. Represent non-ASCII characters with numeric entities.

Verified data boundary

Source text stays on this page.

The published contract marks these tools as client-only processing. Nirmion uses the API only to confirm that this workspace is enabled in MySQL; source values and results are not sent to Flask.

Keep working

HTML Entity DecoderHTML FormatterURL Encoder