onul.works

URL Encoder

Encode URLs and query parameter values, or decode percent-encoded strings back to readable text.

⌘ Runs in browser ◴ No data stored ⌁ Free

Concept

Use URL encoding to safely pass text in URLs

URLs only support a limited character set, so convert Korean text, spaces, and symbols to percent-encoded format before placing them in links or requests.

Characters such as spaces, &/?, #, and non-ASCII text can break URL parsing when used raw, especially in query strings.

This tool helps you apply percent-encoding to text so it remains safe in search links, redirect destinations, and API request values.

When to use it

Use it when inserting user input, Korean terms, filenames, and special symbols into links, redirects, or API URLs.

Full URL vs. value encoding

Encoding an entire URL can also transform separators like '?', '&', and '=', so apply value-level encoding for query parameters whenever possible.

Checkpoint

Before using, compare full-URL encoding and value-only encoding for your query parameter, redirect target, and API call cases.

Spaces become %20 and non-ASCII/special characters become UTF-8 %XX byte sequences. Keep the scope explicit: URL path, full URL, or value-only.

URL or text input
Encoded output

How to use

  1. 1 Enter the URL or text to encode.
  2. 2 Run URL Encode to convert it into a URL-safe percent-encoded format.
  3. 3 Check the result, then copy it.

Common use cases

  • Encode query parameter values with a URL encoder
  • Convert Korean search terms for URLs
  • Handle spaces and special characters safely

Frequently asked questions

What values should I encode with a URL encoder?

It converts text that is hard to place directly in a URL, such as Korean text, spaces, and special characters, into a safe encoded string.

How are spaces handled?

Spaces are represented as %20, matching the default encodeURIComponent behavior.

Should I paste a full URL or a query value?

It is especially useful for text that must be safely passed as a query parameter value. If you paste a full URL, separators may be encoded too.

Related workflow

URL EncoderStart by percent-encoding text so it can travel safely inside a URL. → Base64 DecoderDecode an existing encoded value or included Base64 to compare it with the source text. → Base64 EncoderWhen needed, wrap text in Base64 first to prepare the value that will go into the URL.