javascript replace special characters with unicode json

How to Search and Replace Special Characters and how to Pass JSON ...

April 25, 2025

04:05

How to remove special characters from a given string using JavaScript.

November 11, 2024

01:45

How do I remove special characters in a string in JavaScript? - ...

March 15, 2023

youtube.com

How to Get and Replace Special Characters in Node.js with ...

10:22

JavaScript Unicode Characters and Escape Sequences - YouTube

July 30, 2017

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Metring

ricardometring.com › articles › javascript-replace-special-characters

JavaScript: Replacing Special Characters - The Clean Way

April 12, 2019 - Then the method replaces all occurrences of diacritical characters, combining them in the Unicode sequence \u0300 - \u036F, another advantage of ES6 that was added to allow Unicode ranges in RegEx. To remove the accents and other special characters like /?!(), just use the same formula above, only replace everything but letters and numbers.

Appian Community

community.appian.com › discussions › f › general › 17883 › replace-special-characters-in-json-response

Replace special characters in JSON response

REGEX would probably work, but you could also use out-of-the-box Appian functions. The stripwith() function will remove any characters you define as invalid. So if you wanted to specifically remove the £ symbol, you could use stripwith() like this: stripwith( [JSON Here], "£" ) You can also use the cleanwith() function which does the reverse: it only keeps the characters you define as valid and removes all others. So for example, if you only want to allow letters and numbers, you could use cleanwith() like this: cleanwith( [JSON Here], "abcdefghijklmnopqrstuvwxyz0123456789" ) Both of the methods described above remove the problem characters. If you want to replace them with something else, you can also try the replace function .

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Leapcell

leapcell.io › blog › how-to-escape-strings-in-json

How to Escape Strings in JSON | Leapcell

July 25, 2025 - To safely include special characters in JSON strings, use the following escape sequences: Additionally, Unicode characters can be represented using the \uXXXX format, where XXXX is the four-digit hexadecimal code point.

reddit.com › r/learnjavascript › replace unicode in a string with its symbol...

r/learnjavascript on Reddit: Replace Unicode in a string with its symbol...

August 9, 2018 -

Hey, so I should start by saying, I don’t know if the title is actually what I’m trying to do... hence my problem.

I’m getting data from a wordpress api and the titles have, what I believe are Unicode or ASCII codes for symbols in them, ‘&’ and ‘-‘ for example are a string of numbers, within a string that makes up the title.

I’m not familiar enough with the wordpress api to know how to get it without that if that’s even possible and I’ve tried many different ways to just change these codes within the string into their symbols... please... someone put me out my misery and tell me how to do this?

I don’t seem to be able to google the correct thing, trust me, I’ve tried! I think it’s because I’m not phrasing the question correctly, but I don’t know how to phrase it :S

Cheers for any help 👍🏼

Edit - I’m using React Native. Would decodeURIComponent(); be an option? I’m not looking to work with a uri but it seems to have the effect I’m after from looking at some google results :S

Works for doing exactly what I needed, thanks very much 🙌🏼

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GitHub

gist.github.com › josephrocca › 884cb04e8557e8368a84b8288239a66b

Replace all Unicode characters with escape codes (JavaScript function) · GitHub

Replace all Unicode characters with escape codes (JavaScript function) - escapeUnicode.js

Find elsewhere

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Edureka Community

edureka.co › home › community › categories › web development › node-js › how to replace special characters in a json...

How to replace special characters in a JSON string | Edureka Community

December 17, 2024 - How to replace special characters in a JSON...

stackoverflow.com › questions › 32291309 › json-unicode-characters-conversion

javascript - JSON unicode characters conversion - Stack Overflow

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It is not valid JSON string - JSON supports only 4 hex digits after \u. Results from both PHP and JS are correct.

It is not possible decode this using standard functions.

Where did you get this JSON string?

About correct json for string you want to get - it should be "\u2514\u2500\u2500 mystring", or just "└── mystring" (json supports any unicode characters in strings except " and \).

Also if you need to encode some character that require more than two bytes - it will result in two escape codes for example "𩄎" would be "\ud864\udd0e" when escaped.

So, If you really need to decode string above - you can fix it before decoding, replacing \uffffffe2 by \uffff\uffe2 via regexp (for js it would be something like: s.replace(/(\\u[A-Fa-f0-9]{4})([A-Fa-f0-9]{4})/gi,'$1\\u$2') ).

But anyway character codes in string specified above does not look right.

stackoverflow.com › questions › 2438950 › how-might-i-escape-unicode-characters-in-a-json-string-using-javascript › 2438988

How might I escape Unicode characters in a JSON string using JavaScript? - Stack Overflow

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Your problem is not the unicode escapes, but the unescaped newlines.

{
    "id":31896,
    "name":"Zickey attitude - McKinley,\nLa Rosi\u00e8re,\n21 ao\u00fbt 2006"
}

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well, the error occures only when using jsonpretty :).

shame on me ;)

stackoverflow.com › questions › 30903627 › replace-unicode-characters-with-characters-javascript

Replace unicode characters with characters (Javascript) - Stack Overflow

sitepoint.com › javascript

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@adeneo posted an option using jQuery. Here's a relevant answer I found that doesn't use jQuery. From this answer: What's the right way to decode a string that has special HTML entities in it?

function parseHtmlEnteties(str) {
    return str.replace(/&#([0-9]{1,4});/gi, function(match, numStr) {
        var num = parseInt(numStr, 10); // read num as normal number
        return String.fromCharCode(num);
    });
}

SitePoint

Javascript Replace Unicode Characters - JavaScript - SitePoint Forums | Web Development & Design Community

January 19, 2010 - Hi there, I’ve been trying to write a JavaScript method that replaces instances of RTF double quotes and single quotes or apostrophes. It seems some of our users are pasting RTF from MS Word and that’s causing some prob…

TutorialsPoint

tutorialspoint.com › article › javascript-regex-how-to-replace-special-characters

JavaScript regex - How to replace special characters?

For this we use replace() method. The JavaScript built-in method string.replace() can be used to replace a portion of a supplied string with another string or a regular expression.

reddit.com › r/regex › find and replace all special characters in all json keys

r/regex on Reddit: Find and replace all special characters in all json keys

May 5, 2022 -

So I have a new line delimited JSON

{
"foo-bar":"foo-baar",
"foob@r":"bar.foo",
"b.a.r":"foo"
}

should be normalized to

{
"foobar":"foo-baar",
"foobr":"bar.foo",
"bar":"foo"
}

so it has replaced special characters in the keys (. @ -) in my example.

I am using PCRE

I agree with the other posts, use a parser if possible. But if you are somehow limited to just RegEx and your json is as simple as the example you posted you can do this. Building on u/Kompaan86 ‘s approach, and matching only before the : [^A-Za-z0-9\n"](?=[^:\n]*:) Regex101 demo This can break in 100 ways, so please use a parser if at all possible.

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two parts here the "... in the key of the json" is best done by a json parser, and then you would run the contents of that through a regex. When you say you're using PCRE, in what environment? Any programming/scripting language that I know of can do json parsing and regex really. The regex itself would be simple once you're only running it on the keys, I would recommend to use a list of acceptable characters and replace anything that doesn't match (using a negated character class) with nothing, example: s/[^a-zA-Z0-9]//g

SitePoint

sitepoint.com › javascript

Efficient way of replacing special characters - JavaScript - SitePoint Forums | Web Development & Design Community

April 9, 2024 - Suppose I have a string like this: This is a fridge with 10 chocolates and ~5 icecream samples description to check if backward slash \ breaks anything and checking caret ^ symbol as well I want to replace those special characters with the following: \ to \1F ~ to \7E ^ to \5E I may find more to replace in future but at this point I just want to handle above such that after replacing it, the string looks like the following: This is a fridge with 10 horse and \7E5 goat samples descriptio...

stackoverflow.com › questions › 14613080 › replace-unicode-matches-in-javascript

regex - Replace unicode matches in javascript - Stack Overflow

npmjs.com › package › replace-special-characters

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Adapted from Semplice, following link from here.

[^\x00-\x80] matches any character not in the ASCII range.
Note that some of the characters may not be encoded correctly from the copy and paste.

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{"Á":"A","Ă":"A","Ắ":"A","Ặ":"A","Ằ":"A","Ẳ":"A","Ẵ":"A","Ǎ":"A","Â":"A","Ấ":"A","Ậ":"A","Ầ":"A","Ẩ":"A","Ẫ":"A","Ä":"A","Ǟ":"A","Ȧ":"A","Ǡ":"A","Ạ":"A","Ȁ":"A","À":"A","Ả":"A","Ȃ":"A","Ā":"A","Ą":"A","Å":"A","Ǻ":"A","Ḁ":"A","Ⱥ":"A","Ã":"A","Ꜳ":"AA","Æ":"AE","Ǽ":"AE","Ǣ":"AE","Ꜵ":"AO","Ꜷ":"AU","Ꜹ":"AV","Ꜻ":"AV","Ꜽ":"AY","Ḃ":"B","Ḅ":"B","Ɓ":"B","Ḇ":"B","Ƀ":"B","Ƃ":"B","Ć":"C","Č":"C","Ç":"C","Ḉ":"C","Ĉ":"C","Ċ":"C","Ƈ":"C","Ȼ":"C","Ď":"D","Ḑ":"D","Ḓ":"D","Ḋ":"D","Ḍ":"D","Ɗ":"D","Ḏ":"D","ǲ":"D","ǅ":"D","Đ":"D","Ƌ":"D","Ǳ":"DZ","Ǆ":"DZ","É":"E","Ĕ":"E","Ě":"E","Ȩ":"E","Ḝ":"E","Ê":"E","Ế":"E","Ệ":"E","Ề":"E","Ể":"E","Ễ":"E","Ḙ":"E","Ë":"E","Ė":"E","Ẹ":"E","Ȅ":"E","È":"E","Ẻ":"E","Ȇ":"E","Ē":"E","Ḗ":"E","Ḕ":"E","Ę":"E","Ɇ":"E","Ẽ":"E","Ḛ":"E","Ꝫ":"ET","Ḟ":"F","Ƒ":"F","Ǵ":"G","Ğ":"G","Ǧ":"G","Ģ":"G","Ĝ":"G","Ġ":"G","Ɠ":"G","Ḡ":"G","Ǥ":"G","Ḫ":"H","Ȟ":"H","Ḩ":"H","Ĥ":"H","Ⱨ":"H","Ḧ":"H","Ḣ":"H","Ḥ":"H","Ħ":"H","Í":"I","Ĭ":"I","Ǐ":"I","Î":"I","Ï":"I","Ḯ":"I","İ":"I","Ị":"I","Ȉ":"I","Ì":"I","Ỉ":"I","Ȋ":"I","Ī":"I","Į":"I","Ɨ":"I","Ĩ":"I","Ḭ":"I","Ꝺ":"D","Ꝼ":"F","Ᵹ":"G","Ꞃ":"R","Ꞅ":"S","Ꞇ":"T","Ꝭ":"IS","Ĵ":"J","Ɉ":"J","Ḱ":"K","Ǩ":"K","Ķ":"K","Ⱪ":"K","Ꝃ":"K","Ḳ":"K","Ƙ":"K","Ḵ":"K","Ꝁ":"K","Ꝅ":"K","Ĺ":"L","Ƚ":"L","Ľ":"L","Ļ":"L","Ḽ":"L","Ḷ":"L","Ḹ":"L","Ⱡ":"L","Ꝉ":"L","Ḻ":"L","Ŀ":"L","Ɫ":"L","ǈ":"L","Ł":"L","Ǉ":"LJ","Ḿ":"M","Ṁ":"M","Ṃ":"M","Ɱ":"M","Ń":"N","Ň":"N","Ņ":"N","Ṋ":"N","Ṅ":"N","Ṇ":"N","Ǹ":"N","Ɲ":"N","Ṉ":"N","Ƞ":"N","ǋ":"N","Ñ":"N","Ǌ":"NJ","Ó":"O","Ŏ":"O","Ǒ":"O","Ô":"O","Ố":"O","Ộ":"O","Ồ":"O","Ổ":"O","Ỗ":"O","Ö":"O","Ȫ":"O","Ȯ":"O","Ȱ":"O","Ọ":"O","Ő":"O","Ȍ":"O","Ò":"O","Ỏ":"O","Ơ":"O","Ớ":"O","Ợ":"O","Ờ":"O","Ở":"O","Ỡ":"O","Ȏ":"O","Ꝋ":"O","Ꝍ":"O","Ō":"O","Ṓ":"O","Ṑ":"O","Ɵ":"O","Ǫ":"O","Ǭ":"O","Ø":"O","Ǿ":"O","Õ":"O","Ṍ":"O","Ṏ":"O","Ȭ":"O","Ƣ":"OI","Ꝏ":"OO","Ɛ":"E","Ɔ":"O","Ȣ":"OU","Ṕ":"P","Ṗ":"P","Ꝓ":"P","Ƥ":"P","Ꝕ":"P","Ᵽ":"P","Ꝑ":"P","Ꝙ":"Q","Ꝗ":"Q","Ŕ":"R","Ř":"R","Ŗ":"R","Ṙ":"R","Ṛ":"R","Ṝ":"R","Ȑ":"R","Ȓ":"R","Ṟ":"R","Ɍ":"R","Ɽ":"R","Ꜿ":"C","Ǝ":"E","Ś":"S","Ṥ":"S","Š":"S","Ṧ":"S","Ş":"S","Ŝ":"S","Ș":"S","Ṡ":"S","Ṣ":"S","Ṩ":"S","Ť":"T","Ţ":"T","Ṱ":"T","Ț":"T","Ⱦ":"T","Ṫ":"T","Ṭ":"T","Ƭ":"T","Ṯ":"T","Ʈ":"T","Ŧ":"T","Ɐ":"A","Ꞁ":"L","Ɯ":"M","Ʌ":"V","Ꜩ":"TZ","Ú":"U","Ŭ":"U","Ǔ":"U","Û":"U","Ṷ":"U","Ü":"U","Ǘ":"U","Ǚ":"U","Ǜ":"U","Ǖ":"U","Ṳ":"U","Ụ":"U","Ű":"U","Ȕ":"U","Ù":"U","Ủ":"U","Ư":"U","Ứ":"U","Ự":"U","Ừ":"U","Ử":"U","Ữ":"U","Ȗ":"U","Ū":"U","Ṻ":"U","Ų":"U","Ů":"U","Ũ":"U","Ṹ":"U","Ṵ":"U","Ꝟ":"V","Ṿ":"V","Ʋ":"V","Ṽ":"V","Ꝡ":"VY","Ẃ":"W","Ŵ":"W","Ẅ":"W","Ẇ":"W","Ẉ":"W","Ẁ":"W","Ⱳ":"W","Ẍ":"X","Ẋ":"X","Ý":"Y","Ŷ":"Y","Ÿ":"Y","Ẏ":"Y","Ỵ":"Y","Ỳ":"Y","Ƴ":"Y","Ỷ":"Y","Ỿ":"Y","Ȳ":"Y","Ɏ":"Y","Ỹ":"Y","Ź":"Z","Ž":"Z","Ẑ":"Z","Ⱬ":"Z","Ż":"Z","Ẓ":"Z","Ȥ":"Z","Ẕ":"Z","Ƶ":"Z","Ĳ":"IJ","Œ":"OE","ᴀ":"A","ᴁ":"AE","ʙ":"B","ᴃ":"B","ᴄ":"C","ᴅ":"D","ᴇ":"E","ꜰ":"F","ɢ":"G","ʛ":"G","ʜ":"H","ɪ":"I","ʁ":"R","ᴊ":"J","ᴋ":"K","ʟ":"L","ᴌ":"L","ᴍ":"M","ɴ":"N","ᴏ":"O","ɶ":"OE","ᴐ":"O","ᴕ":"OU","ᴘ":"P","ʀ":"R","ᴎ":"N","ᴙ":"R","ꜱ":"S","ᴛ":"T","ⱻ":"E","ᴚ":"R","ᴜ":"U","ᴠ":"V","ᴡ":"W","ʏ":"Y","ᴢ":"Z","á":"a","ă":"a","ắ":"a","ặ":"a","ằ":"a","ẳ":"a","ẵ":"a","ǎ":"a","â":"a","ấ":"a","ậ":"a","ầ":"a","ẩ":"a","ẫ":"a","ä":"a","ǟ":"a","ȧ":"a","ǡ":"a","ạ":"a","ȁ":"a","à":"a","ả":"a","ȃ":"a","ā":"a","ą":"a","ᶏ":"a","ẚ":"a","å":"a","ǻ":"a","ḁ":"a","ⱥ":"a","ã":"a","ꜳ":"aa","æ":"ae","ǽ":"ae","ǣ":"ae","ꜵ":"ao","ꜷ":"au","ꜹ":"av","ꜻ":"av","ꜽ":"ay","ḃ":"b","ḅ":"b","ɓ":"b","ḇ":"b","ᵬ":"b","ᶀ":"b","ƀ":"b","ƃ":"b","ɵ":"o","ć":"c","č":"c","ç":"c","ḉ":"c","ĉ":"c","ɕ":"c","ċ":"c","ƈ":"c","ȼ":"c","ď":"d","ḑ":"d","ḓ":"d","ȡ":"d","ḋ":"d","ḍ":"d","ɗ":"d","ᶑ":"d","ḏ":"d","ᵭ":"d","ᶁ":"d","đ":"d","ɖ":"d","ƌ":"d","ı":"i","ȷ":"j","ɟ":"j","ʄ":"j","ǳ":"dz","ǆ":"dz","é":"e","ĕ":"e","ě":"e","ȩ":"e","ḝ":"e","ê":"e","ế":"e","ệ":"e","ề":"e","ể":"e","ễ":"e","ḙ":"e","ë":"e","ė":"e","ẹ":"e","ȅ":"e","è":"e","ẻ":"e","ȇ":"e","ē":"e","ḗ":"e","ḕ":"e","ⱸ":"e","ę":"e","ᶒ":"e","ɇ":"e","ẽ":"e","ḛ":"e","ꝫ":"et","ḟ":"f","ƒ":"f","ᵮ":"f","ᶂ":"f","ǵ":"g","ğ":"g","ǧ":"g","ģ":"g","ĝ":"g","ġ":"g","ɠ":"g","ḡ":"g","ᶃ":"g","ǥ":"g","ḫ":"h","ȟ":"h","ḩ":"h","ĥ":"h","ⱨ":"h","ḧ":"h","ḣ":"h","ḥ":"h","ɦ":"h","ẖ":"h","ħ":"h","ƕ":"hv","í":"i","ĭ":"i","ǐ":"i","î":"i","ï":"i","ḯ":"i","ị":"i","ȉ":"i","ì":"i","ỉ":"i","ȋ":"i","ī":"i","į":"i","ᶖ":"i","ɨ":"i","ĩ":"i","ḭ":"i","ꝺ":"d","ꝼ":"f","ᵹ":"g","ꞃ":"r","ꞅ":"s","ꞇ":"t","ꝭ":"is","ǰ":"j","ĵ":"j","ʝ":"j","ɉ":"j","ḱ":"k","ǩ":"k","ķ":"k","ⱪ":"k","ꝃ":"k","ḳ":"k","ƙ":"k","ḵ":"k","ᶄ":"k","ꝁ":"k","ꝅ":"k","ĺ":"l","ƚ":"l","ɬ":"l","ľ":"l","ļ":"l","ḽ":"l","ȴ":"l","ḷ":"l","ḹ":"l","ⱡ":"l","ꝉ":"l","ḻ":"l","ŀ":"l","ɫ":"l","ᶅ":"l","ɭ":"l","ł":"l","ǉ":"lj","ſ":"s","ẜ":"s","ẛ":"s","ẝ":"s","ḿ":"m","ṁ":"m","ṃ":"m","ɱ":"m","ᵯ":"m","ᶆ":"m","ń":"n","ň":"n","ņ":"n","ṋ":"n","ȵ":"n","ṅ":"n","ṇ":"n","ǹ":"n","ɲ":"n","ṉ":"n","ƞ":"n","ᵰ":"n","ᶇ":"n","ɳ":"n","ñ":"n","ǌ":"nj","ó":"o","ŏ":"o","ǒ":"o","ô":"o","ố":"o","ộ":"o","ồ":"o","ổ":"o","ỗ":"o","ö":"o","ȫ":"o","ȯ":"o","ȱ":"o","ọ":"o","ő":"o","ȍ":"o","ò":"o","ỏ":"o","ơ":"o","ớ":"o","ợ":"o","ờ":"o","ở":"o","ỡ":"o","ȏ":"o","ꝋ":"o","ꝍ":"o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function embolden( str, chr ){
    return str.replace( /[^\x00-\x80]/g,
        function (a) { 
            return chr == latin_map[a] ? '<b>' + a + '</b>' : a;
        } 
    );
}

embolden( 'ádám', 'a' );    // "<b>á</b>d<b>á</b>m"

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I've tried this code, see if it's what you're looking for:

'ádám'.replace(/./g,function(char){
    switch(char.toLowerCase()){
        case 'á':
        case 'à':
        case 'â':
        case 'ã':
            return '*';
        break;
    }
    return char;
});

EDIT:

To replace all chars that don't belong to the ASCII table, just check if the char has a char code up to 127, since the ASCII table char codes are defined between 0 and 127 (notice that á doesn't belong to the Unicode table, but to the Extended ASCII table, that comes from 0 up to 255):

'ádám'.replace(/./g,function(char){
    return char.charCodeAt(0)<=127 ? char : '<b>' + char + '</b>';
});

npm

replace-special-characters - npm

October 17, 2022 - const replaceSpecialCharacters = require('replace-special-characters'); const normalizedString = replaceSpecialCharacters('JäváSçrîpt'); //=> 'JavaScript'

      » npm install replace-special-characters

Published Oct 17, 2022

Version 1.2.7

Author Roberto Alves

Repository https://github.com/robertosousa1/replace-special-characters

Homepage https://github.com/robertosousa1/replace-special-characters#readme

stackoverflow.com › questions › 16416610 › replace-unicode-space-characters

javascript - Replace unicode space characters - Stack Overflow

javascript.tutorialink.com › how-to-replace-unicode-characters-in-the-following-scenario-using-javascript

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Remove the regular space that you have first in the pattern:

 str = str.replace(/[\u00A0\u1680\u180e\u2000-\u2009\u200a\u200b\u202f\u205f\u3000]/g,'');

2 of 5

try this:

var str = "Hello this is a test  of the site";
str= str.replace(/[\u00A0\u1680\u180e\u2000-\u2009\u200a\u200b\u202f\u205f\u3000]/g,'')

same as you did, but with out ' ' (regular space)

Tutorialink

How to replace Unicode characters in the following… – JavaScript

I think it’s just a matter of finding the Unicode ranges you want to replace, and normalizing (decomposing) the string: let text = 'abc𝑢𝑣𝑤𝑥𝐚𝐛𝐜𝐝𝒇𝒈𝒉𝒊';text = text.replace(/[u{1d41a}-u{1d433}]+/gu, s => `${s.normalize('NFKD')}`);text = text.replace(/[u{1d44e}-u{1d467}]+/gu, s => `${s.normalize('NFKD')}`);text = text.replace(/[u{1d482}-u{1d49b}]+/gu, s => `${s.normalize('NFKD')}`);console.log(text);

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stackoverflow.com › questions › 45311472 › json-parse-unexpected-character-with-special-characters-in-string

javascript - JSON.parse unexpected character with special characters in string? - Stack Overflow