online url query string encode tool encode link coderstool

there's no publicly known or widely used online url query string encoding tool specifically named "encode link coderstool." it's possible this is a less-known tool, a misspelling, or a tool that's no longer available. however, i can provide a comprehensive tutorial on url query string encoding, including how to do it manually using various programming languages (javascript, python, php) and explain the underlying principles. this will effectively serve as a tutorial for using any url query string encoder, as the core process is the same.

**understanding url query strings**

a url (uniform resource locator) query string is the part of a url that comes after a question mark (`?`). it's used to pass data from a client (like a web browser) to a server. the data is in the form of key-value pairs, separated by ampersands (`&`).

for example:

in this url:

* `query=javascript` is a key-value pair where `query` is the key and `javascript` is the value.
* `page=2` is another key-value pair.

**why encode query strings?**

certain characters in urls have special meanings. for example:

* `&`: separates key-value pairs
* `=`: separates keys and values
* `+`: often used as a space character
* `/`: used to separate parts of a url path

if you include these characters directly in your query string values without encoding them, the url will be interpreted incorrectly. url encoding replaces these special characters with their corresponding percent-encoded equivalents. percent-encoding represents a character with a `%` followed by its two-digit hexadecimal code.

**url encoding with percent encoding**

here's a table showing some common characters and their percent-encoded equivalents:

| character | percent-encoded |
|---|---|
| space | `%20` |
| `!` | `%21` |
| `"` | `%22` |
| `` | `%23` |
| `$` | `%24` |
| `%` | `%25` |
| `&` | `%26` |
| `'` | `%27` |
| `(` | `%28` |
| `)` | `%29` |
| `*` | `%2a` |
| `+` | `%2b` | ...

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