URL 인코더 / 디코더/ 인코딩 · 디코딩 · 폼

// Encode a query parameter value
encodeURIComponent("Hello World! 中文")
// "Hello%20World!%20%E4%B8%AD%E6%96%87"

// Build a full query string (recommended)
const params = new URLSearchParams({
  q: "hello world",
  lang: "zh-CN",
  page: "1",
});
params.toString()
// "q=hello+world&lang=zh-CN&page=1"

// Decode
decodeURIComponent("Hello%20World%21")
// "Hello World!"

from urllib.parse import (
    quote, unquote,
    urlencode, quote_plus
)

# Encode single value
quote("Hello World! 中文")
# 'Hello%20World%21%20%E4%B8%AD%E6%96%87'

# Form encoding (spaces → +)
quote_plus("hello world")
# 'hello+world'

# Build query string
urlencode({"q": "hello world", "page": 1})
# 'q=hello+world&page=1'

# Decode
unquote("Hello%20World%21")  # 'Hello World!'

import "net/url"

// Encode a path segment
url.PathEscape("hello world/中文")
// "hello%20world%2F%E4%B8%AD%E6%96%87"

// Encode a query value
url.QueryEscape("hello world")
// "hello+world"

// Build query string
params := url.Values{}
params.Set("q", "hello world")
params.Set("lang", "zh-CN")
params.Encode()
// "lang=zh-CN&q=hello+world"

// Parse a URL
u, _ := url.Parse("https://example.com/search?q=hello+world")
u.Query().Get("q")  // "hello world"

# curl handles encoding automatically with --data-urlencode
curl -G https://api.example.com/search \
  --data-urlencode "q=hello world 中文" \
  --data-urlencode "page=1"

# Manual percent-encoding with Python
python3 -c "
import sys
from urllib.parse import quote
print(quote(sys.stdin.read().strip()))
" <<< "hello world 中文"

# Using jq to build encoded JSON body
curl -X POST https://api.example.com \
  -H 'Content-Type: application/json' \
  -d "$(jq -n --arg q 'hello world' '{query: $q}')"