Free HTML Encoder & Decoder Online

Use the html encoder decoder tool online for quick developer workflows. Add examples, caveats, and avoid pasting sensitive secrets.

Free online file converter tool. Works in Chrome Firefox Safari Edge Opera and other modern browsers on Windows macOS Linux Android and iOS. No software installation required. Browser-side processing keeps your file local when supported. Completely free to use with no account needed.

Free HTML Encoder & Decoder Online

Encode HTML special characters to entities and decode entities back to plain text in real time.

Key Features

Everything you need to handle HTML special characters

Bidirectional Conversion

Encode text to HTML entities or decode entities back to readable text with a single click.

Real-Time Output

Results update instantly as you type so you can see the conversion without clicking any button.

Privacy First

browser-side workflows runs locally in your browser. Your data stays on your device for browser-side workflows.

How to Encode or Decode HTML Entities

  1. Pick the Encode or Decode tab

    Use the Encode tab to turn raw characters such as &, <, > and quotes into safe entities, or the Decode tab to turn existing entities back into plain characters. Switching tabs clears both boxes so you start from a clean slate.

  2. Type or paste into the Input box

    Drop your snippet into the Input area. The conversion runs as you type and stays on your device, so there is no upload step and no button to press to see results.

  3. Copy or clear the result

    The converted text appears instantly in the Output box. Press Copy Result to send it to your clipboard, or Clear to empty both boxes and convert something else.

What Each Mode Converts

The encoder targets the five characters that can break markup or open injection holes, while the decoder reverses entities back to readable text. The table below shows exactly what this tool transforms in each direction.

Character or entityEncode outputDecode input it accepts
Ampersand (&)&&
Less-than (<)<<
Greater-than (>)>>
Double quote (")""
Single quote (')'' or '
Symbols (copyright, dashes, nbsp)Left as-is© ® ™ &mdash; &ndash;   and more

When to Reach for This Tool

Displaying code in HTML

Encode a snippet before placing it inside a page so that tags render as visible text instead of being parsed as real markup.

Sanitizing user input

Encoding the five reserved characters is a core defense against breaking your layout and against script injection when echoing untrusted text.

Reading scraped or escaped content

Use Decode to turn entities like & or numeric codes such as © back into plain characters so you can read or reuse the original text.

Quick one-off conversions

For a single string you do not need a library or build step. Paste it, read the live output, and copy the result in a couple of clicks.

Common Problems and Fixes

An entity stayed unchanged after decoding

The decoder recognizes a fixed set of named entities (such as &, <, © and &mdash;) plus any decimal &#NN; or hex &#xNN; code. Less common named entities are left untouched on purpose; convert them to their numeric form first if you need them decoded.

My single quotes became ' not '

This is expected. The encoder always outputs the numeric ' for single quotes because it is supported everywhere, including older HTML. The decoder accepts both ' and ' and turns either back into an apostrophe.

Switching tabs wiped my text

Changing between Encode and Decode clears both boxes so the two modes never mix. Copy any output you want to keep before switching, then paste it back into the Input box.

Nothing happens when I press Copy

Copy Result only works when the Output box has content, and clipboard access requires a modern browser. If the button does nothing, confirm there is output and select the text manually as a fallback.

References

  1. HTML Living Standard - WHATWG
  2. HTML character references - MDN Web Docs, Mozilla
  3. Named character references - WHATWG
  4. Cross-site scripting (XSS) - OWASP
  5. HTML - MDN Web Docs, Mozilla
  6. Character encodings in HTML - overview
  7. Clipboard.writeText() - MDN Web Docs, Mozilla
  8. HTML entity - MDN Web Docs, Mozilla