stripAccents — GTM Variable Template for String

VARIABLES › STRING

stripAccents EXTENDED String

Direct (.tpl) Apply (.tpl) Add to GTM

Replaces accented characters with their closest ASCII equivalents. Preserves the original case of the string. This is the GTM sandbox equivalent of .normalize('NFD').replace(/[\u0300-\u036f]/g, ''), which is not available in the sandboxed JavaScript environment.

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When to Use This

String Manipulation

Transform, clean, and normalize text data for consistent downstream processing.

Formatting

Normalize casing, spacing, encoding, and presentation of data values.

Type Conversion

Safely convert between data types — strings, numbers, booleans, arrays, objects.

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Examples

French accents▶ Try

INPUT

Text To Strip: Café résumé naïve

OUTPUT

Cafe resume naive

German umlauts and eszett▶ Try

INPUT

Text To Strip: Über große Straße

OUTPUT

Ueber grosse Strasse

Non-string returns undefined▶ Try

INPUT

Text To Strip: 12345

OUTPUT

undefined

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Live Sandbox

This is what you'll see when you open this variable in Google Tag Manager. Hover the icons for details.

stripAccents

Read-Only Try Live

Text To Strip

💾 The string from which to remove accented characters.

Supported formats:
  ✓ String

Input Setup

Input Function (optional)

⚙️ Optional pre-processing function applied to the input before stripping accents.

Result Handling

Output Function (optional)

⚙️ Optional function to apply to the result before returning it (e.g., toLowerCase(), slugify). Useful for chaining transformations on the output.

Text To Strip string

💡 Type any text to see the result update live

🎯 Using special value — click input to type instead

Test with:

Falsy undefined null "" empty 0 false NaN

Truthy true 42 "hello" {} empty [] empty {a:1} [1,2,3]

🔗 Result Handling — Chain Variables

Chain apply-mode variables to the output. Each variable receives the result of the previous one.

stripAccents()

+ Chain another variable

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Related Variables

Same category: String

→ charAt → collapseWhitespace → concat → countWordsInString → endsWith → extract → extractFirstSegment → extractNumber → fromBase64 → indexOf → left → matchAll → matchRegex → normalizeEmail → normalizePhone → padEnd → padStart → parseJSON → replaceAll → replaceAllWithRegex → replaceFirst → right → safeSplit → search → slice → slugify → split → startsWith → stripHtml → substringAfter → substringBefore → test → toBase64 → toCamelCase → toJsonString → toKebabCase → toLocaleLowerCase → toLocaleUpperCase → toLowerCase → toNumber → toSnakeCase → toStartCase → toString → toStringRepresentation → toUpperCase → toUpperFirst → trim → trimEnd → trimStart → truncate

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Under the Hood

📜 View Implementation Code

/**
* Replaces accented characters with their closest ASCII equivalents.
*
* GTM sandbox alternative to .normalize('NFD').replace(/[\u0300-\u036f]/g, ''),
* which is not available in the sandboxed JavaScript environment.
*
* Handles both uppercase and lowercase accented characters, preserving
* the original case of the surrounding text. Multi-character replacements
* (ß→ss, æ→ae, œ→oe, þ→th, Æ→AE, Œ→OE, Þ→Th) follow standard
* transliteration conventions.
*
* @param {string} data.src - The string to strip accents from.
* @param {Function|string} [data.out] - Optional output handler.
*
* Direct-mode specific parameters:
* @param {Function} [data.pre] - Optional pre-processor function.
*
* @returns {string|undefined} The string with accents replaced, or undefined if input is not a string.
*
* @framework ggLowCodeGTMKit
*/
const stripAccents = function(input) {
   if (typeof input !== 'string') { return undefined; }

   var map = {
  'à':'a','á':'a','â':'a','ã':'a','ä':'ae','å':'a','æ':'ae',
  'ç':'c',
  'è':'e','é':'e','ê':'e','ë':'e',
  'ì':'i','í':'i','î':'i','ï':'i',
  'ð':'d','ñ':'n',
  'ò':'o','ó':'o','ô':'o','õ':'o','ö':'oe','ø':'o','œ':'oe',
  'ù':'u','ú':'u','û':'u','ü':'ue',
  'ý':'y','ÿ':'y','þ':'th','ß':'ss',

  'ł':'l','đ':'d',
  'ž':'z','š':'s','č':'c','ř':'r','ě':'e','ů':'u',
  'ń':'n','ň':'n','ś':'s','ź':'z','ż':'z',
  'ą':'a','ę':'e','ć':'c',
  'ő':'o','ű':'u',
  'ğ':'g','ı':'i','ş':'s',
  'ť':'t','ď':'d','ľ':'l','ĺ':'l','ŕ':'r',

  'À':'A','Á':'A','Â':'A','Ã':'A','Ä':'Ae','Å':'A','Æ':'AE',
  'Ç':'C',
  'È':'E','É':'E','Ê':'E','Ë':'E',
  'Ì':'I','Í':'I','Î':'I','Ï':'I',
  'Ð':'D','Ñ':'N',
  'Ò':'O','Ó':'O','Ô':'O','Õ':'O','Ö':'Oe','Ø':'O','Œ':'OE',
  'Ù':'U','Ú':'U','Û':'U','Ü':'Ue',
  'Ý':'Y','Ÿ':'Y','Þ':'Th',

  'Ł':'L','Đ':'D',
  'Ž':'Z','Š':'S','Č':'C','Ř':'R','Ě':'E','Ů':'U',
  'Ń':'N','Ň':'N','Ś':'S','Ź':'Z','Ż':'Z',
  'Ą':'A','Ę':'E','Ć':'C',
  'Ő':'O','Ű':'U',
  'Ğ':'G','İ':'I','Ş':'S',
  'Ť':'T','Ď':'D','Ľ':'L','Ĺ':'L','Ŕ':'R'
};

var result = [];
  for (var i = 0; i < input.length; i++) {
    var c = input.charAt(i);
    var r = map[c];
    result.push(r !== undefined ? r : c);
  }
  return result.join('');
};

const safeFunction = fn => typeof fn === 'function' ? fn : x => x;
const out = safeFunction(data.out);

// ===============================================================================
// stripAccents - Direct mode
// ===============================================================================
const applyCast = (castFn, value) => safeFunction(castFn)(value);
const value = applyCast(data.pre, data.src);
return out(stripAccents(value));
// ===============================================================================
// stripAccents() – Apply Mode
// ===============================================================================
/*
return function(value) {
  return out(stripAccents(value));
};
*/

🧪 View Test Scenarios (11 tests)

✅ '[example] French accents'
✅ '[example] German umlauts and eszett'
✅ Spanish with ñ
✅ Scandinavian characters
✅ Czech and Polish characters
✅ No accents - unchanged
✅ Ligatures - æ and œ
✅ Turkish characters
✅ Mixed case preserves case
✅ '[example] Non-string returns undefined'
✅ Empty string returns empty