Charset Checker

Detect `` declaration, `http-equiv` headers, and Content-Type HTTP response header character encoding (e.g. UTF-8).

Popular examples: https://google.comhttps://github.comhttps://wikipedia.org
UTF-8 Standard Verification

Confirm your site uses UTF-8 character encoding to prevent garbled text characters across browsers.

Early Placement Inspection

Verify that the charset meta tag is positioned within the first 1024 bytes of your HTML <head>.

HTTP Header Alignment

Ensure server Content-Type HTTP headers match in-page HTML meta charset tags.

Auditing character encoding configuration...

Charset Validation Summary
Detected Character Encoding Tags
HTML5 Meta Charset Tag-
HTML4 Http-Equiv Tag-
HTTP Header Content-Type-

Why UTF-8 Charset Declaration Matters

Declaring UTF-8 character encoding prevents cross-site scripting (XSS) UTF-7 vulnerabilities and guarantees that special characters, accented letters, non-English typography, and emojis display properly across all international browsers and mobile devices.

How to Use the Charset Checker

1 Enter URL

Paste any public webpage address or web application link.

2 Click Check Charset

Our tool fetches page headers and parses HTML <meta charset> attributes.

3 Verify UTF-8

Ensure HTML5 meta charset and HTTP response Content-Type declare UTF-8 encoding.

Charset Encoding Best Practices

Recommended
  • Always use HTML5 standard <meta charset="utf-8"> tag.
  • Place the charset tag within the first 1024 bytes of the HTML document.
  • Configure web servers (Apache/Nginx) to send Content-Type: text/html; charset=utf-8.
  • Save source code files using UTF-8 format without BOM (Byte Order Mark).
Avoid
  • Avoid legacy encodings like ISO-8859-1 or Windows-1252.
  • Do not place charset meta tags after large <style> or <script> blocks.
  • Avoid conflicting charset declarations between HTTP headers and HTML tags.
  • Don't omit the charset tag, which forces browsers to guess encoding.

Frequently Asked Questions (FAQ)

Browsers scan the first 1024 bytes of an HTML document to determine character encoding before parsing content. If the charset tag appears too late, the browser must stop rendering and restart parsing in the correct encoding.

HTML4 required verbose syntax: <meta http-equiv="Content-Type" content="text/html; charset=utf-8">. HTML5 simplified this to <meta charset="utf-8">.

HTTP response headers take precedence over HTML <meta> tags. If Nginx sends charset=iso-8859-1, browsers will override your HTML5 UTF-8 tag.

Indirectly yes. Incorrect encoding leads to garbled text characters (e.g. symbols), confusing search engine indexers and frustrating website visitors.

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