Check out the built-in function encodeURIComponent(str) and encodeURI(str).
In your case, this should work:
var myOtherUrl =
"http://example.com/index.html?url=" + encodeURIComponent(myUrl);
MDN Web Docs
developer.mozilla.org › en-US › docs › Web › JavaScript › Reference › Global_Objects › encodeURIComponent
encodeURIComponent() - JavaScript | MDN
The encodeURIComponent() function encodes a URI by replacing each instance of certain characters by one, two, three, or four escape sequences representing the UTF-8 encoding of the character (will only be four escape sequences for characters composed of two surrogate characters).
MDN Web Docs
developer.mozilla.org › en-US › docs › Web › API › TextEncoder › encode
TextEncoder: encode() method - Web APIs | MDN
June 28, 2025 - const sourcePara = document.querySelector(".source"); const resultPara = document.querySelector(".result"); const string = sourcePara.textContent; const textEncoder = new TextEncoder(); const encoded = textEncoder.encode(string); resultPara.textContent = `${resultPara.textContent} ${encoded}`;
How to encode a string in JavaScript for displaying in HTML? - Stack Overflow
Possible Duplicate: How to escape HTML How can a string be converted to HTML in JavaScript? e.g. var unsafestring = " "; var safestring = magic(unsafestring); where More on stackoverflow.com
How can I json encode this string "[{"First":"Tom","Last":"Bowsen"}]"
That's already encoded. What you want to do is decode it. import 'dart:convert'; void main(){ final content = '[{"First":"Tom","Last":"Bowsen"}]'; final map = json.decode(content)[0] as Map; print(map['First']); print(map['Last']); } More on reddit.com
6
5
December 29, 2020[Javascript] Console escape character for a new line "\n" doesn't seem to work in Node
Use console.log.
More on reddit.com 10
1
February 7, 2018How do I put a JSON object in a URL as a GET parameter?
JSON itself is a string. To turn your object into JSON you simply need to call a JSON.stringify(obj). Make sure you url-encode the string as well with encodeURI() before appending it to a link
More on reddit.com 25
13
December 25, 201703:24
How to Base64 Encode Any String in JavaScript (Node.js Version) ...
Encode and Decode Strings ( Leetcode #271 ) | Using ...
11:50
Encoding Text in HTML with Javascript - Learn to Code - Ep 5 - YouTube
02:03
How to Encode a URL in JavaScript (encodeURI vs encodeURIComponent) ...
Top answer 1 of 16
3239
Check out the built-in function encodeURIComponent(str) and encodeURI(str).
In your case, this should work:
var myOtherUrl =
"http://example.com/index.html?url=" + encodeURIComponent(myUrl);
2 of 16
1710
You have three options:
escape()will not encode:@*/+encodeURI()will not encode:~!@#$&*()=:/,;?+'encodeURIComponent()will not encode:~!*()'
But in your case, if you want to pass a URL into a GET parameter of other page, you should use escape or encodeURIComponent, but not encodeURI.
See Stack Overflow question Best practice: escape, or encodeURI / encodeURIComponent for further discussion.
W3Schools
w3schools.com › jsref › jsref_encodeuri.asp
JavaScript encodeURI() Method
The encodeURI() method encodes a URI.
Top answer 1 of 5
85
function htmlEntities(str) {
return String(str).replace(/&/g, '&').replace(/</g, '<').replace(/>/g, '>').replace(/"/g, '"');
}
So then with var unsafestring = "<oohlook&atme>"; you would use htmlEntities(unsafestring);
2 of 5
47
Do not bother with encoding. Create a text node using createTextNode instead. Data in text node is guaranteed to be treated as text. (from the docs: "This method can be used to escape HTML characters.")
document.body.appendChild(document.createTextNode("Your&funky<text>here"))
TutorialsPoint
tutorialspoint.com › article › how-to-encode-a-string-in-javascript
How to encode a string in JavaScript?
The btoa() method encodes a string into Base64 format, which is commonly used for data transmission and storage.
web.dev
web.dev › articles › the nuances of base64 encoding strings in javascript
The nuances of base64 encoding strings in JavaScript | Articles | web.dev
October 17, 2023 - Importantly, JavaScript processes strings as UTF-16. This breaks functions like btoa(), which effectively operate on the assumption that each character in the string maps to a single byte. This is stated explicitly on MDN: The btoa() method creates a Base64-encoded ASCII string from a binary string (i.e., a string in which each character in the string is treated as a byte of binary data).
Honeybadger
honeybadger.io › blog › encode-javascript
The character encoding cheat sheet for JS developers - Honeybadger Developer Blog
September 21, 2023 - However, JavaScript can be used to dynamically load or generate content on a webpage, such as text or images. In these cases, it may be necessary to specify the type of character encoding for the dynamically generated content, which can’t be done with a meta tag. const string = 'こんにちは、世界！'; // Japanese string const encodedString = encodeURIComponent(string); console.log(encodedString);
MDN Web Docs
developer.mozilla.org › en-US › docs › Web › JavaScript › Reference › Global_Objects › encodeURI
encodeURI() - JavaScript | MDN
The encodeURI() function encodes a URI by replacing each instance of certain characters by one, two, three, or four escape sequences representing the UTF-8 encoding of the character (will only be four escape sequences for characters composed of two surrogate characters).
Coderstoolbox
coderstoolbox.net › string
Online JavaScript string encoder .. ...
Encode and decode strings: Base64, URL, XML, JavaScript
GeeksforGeeks
geeksforgeeks.org › javascript › javascript-encode-decode-a-string-to-base64
JavaScript | Encode/Decode a string to Base64 - GeeksforGeeks
May 28, 2024 - These functions help in encoding special characters in a URL or decoding encoded strings back to their original form. This method encodes a string in base-64 and uses the "A-Z", "a-z", "0-9", "+", "/" and "=" characters to encode the provided string.
PortSwigger
portswigger.net › web-security › cross-site-scripting
What is cross-site scripting (XSS) and how to prevent it? | Web Security Academy
Escape your outputs with htmlentities and ENT_QUOTES for HTML contexts, or JavaScript Unicode escapes for JavaScript contexts. How do I prevent XSS in Java? Filter your inputs with a whitelist of allowed characters and use a library such as Google Guava to HTML-encode your output for HTML contexts, or use JavaScript Unicode escapes for JavaScript contexts.
Token
token.dev
JWT Debugger
Encode or Decode JWTs · Paste a JWT and decode its header, payload, and signature, or provide header, payload, and signature information to generate a JWT. Learn More · Algorithm · JWT String · Warning: Security Tokens should be kept secret. Verification of the JWT is done in the browser only!
DigitalOcean
digitalocean.com › community › tutorials › how-to-encode-and-decode-strings-with-base64-in-javascript
How To Encode and Decode Strings with Base64 in JavaScript | DigitalOcean
October 2, 2025 - We will also cover common applications ... explains the correct approach for Node.js environments. ... JavaScript’s btoa() and atob() functions handle Base64 encoding and decoding for ASCII strings....
TutorialsPoint
tutorialspoint.com › article › encoding-string-to-reduce-its-size-in-javascript
Encoding string to reduce its size in JavaScript
March 15, 2026 - We need to write a JavaScript function that takes a string and encodes it using a compression format. The function should compare the encoded string with the original and return whichever is smaller.
Dadroit
dadroit.com › online string to json converter
Online String to JSON Converter
Convert String into JSON format easily and securely. Your data is processed on your device, ensuring privacy.
CheckSERP
checkserp.com › encode › unicode
Unicode Converter, Unicode Encoding and Decoder | CheckSERP
Online Unicode converter, easy to use unicode encoding and decoder tool. Convert plain text to unicode codes and vice versa.
Google AI
ai.google.dev › gemini api › openai compatibility
OpenAI compatibility | Gemini API | Google AI for Developers
June 22, 2026 - } ], "tools": [ { "type": "function", "function": { "name": "get_weather", "description": "Get the current weather in a given location", "parameters": { "type": "object", "properties": { "location": { "type": "string", "description": "The city and state, e.g. Chicago, IL" }, "unit": { "type": "string", "enum": ["celsius", "fahrenheit"] } }, "required": ["location"] } } } ], "tool_choice": "auto" }' Gemini models are natively multimodal and provide best in class performance on many common vision tasks. import base64 from openai import OpenAI client = OpenAI( api_key="GEMINI_API_KEY", base_url="
Telerik
telerik.com › blogs › encode-and-decode-strings-using-javascript
Encode and Decode strings using JavaScript
May 27, 2021 - The escape() method returns a string value (in Unicode format) that represents the encoded contents of the function argument. All spaces, punctuation, accented characters, and any other non-ASCII characters are replaced with %xx encoding, where xx is equivalent to the hexadecimal number representing the character.
CyberChef
toolbox.itsec.tamu.edu
CyberChef
Maybe you have 10 timestamps that you want to parse or 16 encoded strings that all have the same key.