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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>HTTP Response Header Printer — DevDunia</title>
<meta name="description" content="Test HTTP endpoints and view response headers, status codes, and timing. Free online HTTP header printer tool.">
<meta property="og:type" content="website">
<meta property="og:url" content="https://devdunia.com/production/http-response-header-printer.html">
<meta property="og:title" content="HTTP Response Header Printer — DevDunia">
<meta property="og:description" content="Test HTTP endpoints and view response headers, status codes, and timing.">
<meta property="og:image" content="https://devdunia.com/images/logo.png">
<link rel="preconnect" href="https://fonts.googleapis.com">
<link href="https://fonts.googleapis.com/css2?family=Bangers&family=Comic+Neue:wght@400;700&family=Space+Mono:wght@400;700&display=swap" rel="stylesheet">
<style>
:root {
--ink: #1a1410;
--paper: #fdf3e3;
--paper2: #fbe9cc;
--red: #e63946;
--blue: #1d6fb8;
--yellow: #ffd23f;
--green: #3fa34d;
--pink: #ff6b9d;
--purple: #8a4fff;
--orange: #ff8c42;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: 'Comic Neue', cursive; font-weight: 400; color: var(--ink); background-color: var(--paper); background-image: radial-gradient(var(--ink) 0.5px, transparent 0.6px); background-size: 14px 14px; background-attachment: fixed; min-height: 100vh; }
.paper-overlay { position: fixed; inset: 0; background: rgba(253,243,227,.78); pointer-events: none; z-index: 0; }
.page-wrap { position: relative; z-index: 1; max-width: 1240px; margin: 0 auto; padding: 20px 32px 60px; }
/* PANEL */
.panel { background: var(--paper); border: 4px solid var(--ink); border-radius: 6px; box-shadow: 7px 7px 0 var(--ink); overflow: hidden; margin-bottom: 22px; }
.panel-header { background: var(--ink); color: var(--yellow); font-family: 'Bangers', cursive; font-size: 1.2rem; letter-spacing: 2px; padding: 8px 16px; display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.panel-header .panel-tag { font-family: 'Space Mono', monospace; font-size: .65rem; font-weight: 700; background: var(--yellow); color: var(--ink); padding: 2px 7px; border-radius: 3px; }
.panel-body { padding: 18px 20px; }
/* SECTION LABEL */
.section-label { font-family: 'Bangers', cursive; font-size: .95rem; letter-spacing: 1px; color: var(--ink); margin-bottom: 6px; text-transform: uppercase; }
/* INPUTS */
.comic-input { width: 100%; background: #fff; border: 3px solid var(--ink); border-radius: 6px; padding: 10px 14px; font-family: 'Space Mono', monospace; font-size: .82rem; color: var(--ink); outline: none; box-shadow: inset 3px 3px 0 rgba(0,0,0,.06); transition: border-color .15s; }
.comic-input:focus { border-color: var(--green); }
.comic-input::placeholder { color: #aaa; font-style: italic; }
.comic-select { width: 100%; background: var(--paper2); border: 3px solid var(--ink); border-radius: 6px; padding: 10px 14px; font-family: 'Space Mono', monospace; font-size: .82rem; color: var(--ink); outline: none; box-shadow: 3px 3px 0 var(--ink); cursor: pointer; }
.comic-textarea { width: 100%; background: #fff; border: 3px solid var(--ink); border-radius: 6px; padding: 12px 14px; font-family: 'Space Mono', monospace; font-size: .82rem; color: var(--ink); line-height: 1.6; resize: vertical; min-height: 100px; box-shadow: inset 3px 3px 0 rgba(0,0,0,.06); outline: none; }
.comic-textarea:focus { border-color: var(--green); }
.comic-textarea::placeholder { color: #aaa; font-style: italic; }
/* FORM GRID */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-bottom: 14px; }
/* BUTTONS */
.btn-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 14px; justify-content: center; }
.btn { font-family: 'Bangers', cursive; font-size: 1.1rem; letter-spacing: 1px; border: 3px solid var(--ink); border-radius: 6px; padding: 8px 20px; cursor: pointer; box-shadow: 4px 4px 0 var(--ink); transition: transform .1s, box-shadow .1s; text-transform: uppercase; }
.btn:active { transform: translate(2px,2px); box-shadow: 2px 2px 0 var(--ink); }
.btn-success { background: var(--green); color: #fff; }
.btn-neutral { background: var(--paper2); color: var(--ink); }
/* NOTICE BUBBLE */
.notice-bubble {
background: #fffbe6; border: 3px solid var(--yellow); border-radius: 10px;
padding: 10px 14px; margin-bottom: 14px; font-size: .85rem;
display: flex; gap: 8px; align-items: flex-start;
}
.notice-bubble .notice-icon { font-size: 1.1rem; flex-shrink: 0; }
/* HEADERS ROW */
.header-row { display: flex; gap: 8px; align-items: center; margin-bottom: 8px; }
.header-input { flex: 1; background: #fff; border: 3px solid var(--ink); border-radius: 6px; padding: 8px 10px; font-family: 'Space Mono', monospace; font-size: .78rem; color: var(--ink); outline: none; box-shadow: inset 2px 2px 0 rgba(0,0,0,.06); }
.header-sep { font-family: 'Bangers', cursive; font-size: 1.1rem; color: var(--ink); }
.header-remove { font-family: 'Bangers', cursive; font-size: .9rem; background: var(--red); color: #fff; border: 2px solid var(--ink); border-radius: 4px; padding: 5px 10px; cursor: pointer; box-shadow: 2px 2px 0 var(--ink); }
.add-header-btn { font-family: 'Bangers', cursive; font-size: .9rem; background: var(--green); color: #fff; border: 2px solid var(--ink); border-radius: 4px; padding: 5px 12px; cursor: pointer; box-shadow: 2px 2px 0 var(--ink); letter-spacing: 1px; }
/* ERROR BUBBLE */
.error-bubble { display: none; position: relative; background: #fff0f0; border: 3px solid var(--red); border-radius: 14px; padding: 10px 14px; margin-top: 12px; font-size: .9rem; font-weight: 700; color: var(--red); }
.error-bubble::before { content: ''; position: absolute; top: -16px; left: 22px; border-width: 0 10px 16px; border-style: solid; border-color: transparent transparent var(--red); }
.error-bubble::after { content: ''; position: absolute; top: -11px; left: 24px; border-width: 0 8px 12px; border-style: solid; border-color: transparent transparent #fff0f0; }
.error-bubble.show { display: block; }
/* STATS */
.stats-row { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 16px; }
.stat-chip { font-family: 'Space Mono', monospace; font-size: .72rem; font-weight: 700; padding: 6px 12px; border: 2px solid var(--ink); border-radius: 4px; box-shadow: 2px 2px 0 var(--ink); display: flex; align-items: center; gap: 5px; }
.stat-chip .stat-label { opacity: .65; font-weight: 400; }
.chip-blue { background: var(--blue); color: #fff; }
.chip-green { background: var(--green); color: #fff; }
.chip-yellow { background: var(--yellow); color: var(--ink); }
/* CODE OUTPUT */
.code-output {
background: var(--ink); color: var(--paper); font-family: 'Space Mono', monospace;
font-size: .75rem; border-radius: 6px; padding: 14px 16px;
white-space: pre-wrap; line-height: 1.7; max-height: 350px;
overflow-y: auto; border: 3px solid var(--ink);
box-shadow: 3px 3px 0 rgba(0,0,0,.3);
}
/* COPY BTN */
.copy-btn { font-family: 'Bangers', cursive; font-size: .9rem; letter-spacing: 1px; background: var(--ink); color: var(--yellow); border: 2px solid var(--ink); border-radius: 4px; padding: 3px 10px; cursor: pointer; box-shadow: 2px 2px 0 rgba(0,0,0,.4); transition: transform .1s; }
.copy-btn:active { transform: translate(1px,1px); }
/* EXAMPLES GRID */
.examples-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.example-card { background: var(--paper2); border: 3px solid var(--ink); border-radius: 6px; box-shadow: 4px 4px 0 var(--ink); padding: 10px 12px; cursor: pointer; transition: transform .1s, box-shadow .1s; }
.example-card:hover { transform: translate(-2px,-2px); box-shadow: 6px 6px 0 var(--ink); }
.example-card:active { transform: translate(1px,1px); box-shadow: 2px 2px 0 var(--ink); }
.example-title { font-family: 'Bangers', cursive; font-size: .95rem; letter-spacing: 1px; margin-bottom: 2px; }
.example-desc { font-size: .78rem; color: var(--ink); opacity: .7; }
/* DIVIDER */
.divider { border: none; border-top: 3px solid var(--ink); margin: 16px 0; }
@media (max-width: 760px) {
.form-grid { grid-template-columns: 1fr; }
.examples-grid { grid-template-columns: 1fr; }
}
</style>
</head>
<body>
<div class="paper-overlay"></div>
<div data-masthead></div>
<div class="page-wrap">
<!-- MASTHEAD -->
<div data-tool-hero
data-title="HTTP Header Inspector"
data-chapter="05"
data-category="API & Dev Tools"
data-icon="📨"
data-desc="Fetch and display all HTTP response headers from any URL. Debug caching, CORS, security headers and more."
data-color="blue"
data-badges="HTTP,HEADERS,CORS,FREE"
data-badge-colors="blue,orange,red,yellow">
</div>
<!-- REQUEST PANEL -->
<div class="panel">
<div class="panel-header">
⚙ REQUEST CONFIGURATION
<span class="panel-tag">INPUT</span>
</div>
<div class="panel-body">
<div class="notice-bubble">
<span class="notice-icon">⚠️</span>
<div>
<strong>CORS Notice:</strong> For external domains, we use a CORS proxy (GET only). For POST/PUT/PATCH to external domains, use a browser extension or server-side solution.
</div>
</div>
<div class="form-grid">
<div>
<div class="section-label">URL</div>
<input type="url" id="url-input" class="comic-input" placeholder="https://api.example.com/endpoint">
</div>
<div>
<div class="section-label">HTTP Method</div>
<select id="method-select" class="comic-select">
<option value="GET">GET</option>
<option value="POST">POST</option>
<option value="PUT">PUT</option>
<option value="PATCH">PATCH</option>
<option value="DELETE">DELETE</option>
<option value="HEAD">HEAD</option>
<option value="OPTIONS">OPTIONS</option>
</select>
</div>
</div>
<div style="margin-bottom:14px;">
<div style="display:flex;align-items:center;justify-content:space-between;margin-bottom:8px;">
<div class="section-label" style="margin-bottom:0;">Custom Headers</div>
<button id="add-header-btn" class="add-header-btn">+ Add Header</button>
</div>
<div id="headers-container"></div>
</div>
<div id="request-body-section" style="display:none;margin-bottom:14px;">
<div class="section-label">Request Body</div>
<textarea id="request-body" class="comic-textarea" rows="4" placeholder='{"key": "value"}'></textarea>
</div>
<div class="btn-row">
<button id="send-request-btn" class="btn btn-success">🚀 Send Request!</button>
</div>
<div id="error-bubble" class="error-bubble">
💥 <span id="error-msg">Something went wrong!</span>
</div>
</div>
</div>
<!-- RESPONSE PANEL -->
<div class="panel" id="response-panel" style="display:none;">
<div class="panel-header">
📤 RESPONSE
<span class="panel-tag">OUTPUT</span>
</div>
<div class="panel-body">
<div class="stats-row">
<div class="stat-chip chip-blue">
<span class="stat-label">STATUS</span>
<span id="status-code">—</span>
</div>
<div class="stat-chip chip-green">
<span class="stat-label">TIME</span>
<span id="response-time">—</span>
</div>
<div class="stat-chip chip-yellow">
<span class="stat-label">CONTENT-LENGTH</span>
<span id="content-length">—</span>
</div>
</div>
<div class="section-label">Response Headers</div>
<pre id="headers-output" class="code-output" style="margin-bottom:14px;"></pre>
<div style="display:flex;align-items:center;justify-content:space-between;margin-bottom:6px;">
<div class="section-label" style="margin-bottom:0;">Response Body</div>
<button id="copy-response-btn" class="copy-btn">📋 COPY ALL</button>
</div>
<pre id="body-output" class="code-output"></pre>
</div>
</div>
<!-- EXAMPLES PANEL -->
<div class="panel">
<div class="panel-header">
📚 EXAMPLE URLS — CLICK TO LOAD
<span class="panel-tag">EXAMPLES</span>
</div>
<div class="panel-body">
<div class="examples-grid">
<div class="example-card" data-url="https://httpbin.org/headers">
<div class="example-title" style="color:var(--green);">httpbin.org/headers</div>
<div class="example-desc">Returns request headers as JSON</div>
</div>
<div class="example-card" data-url="https://httpbin.org/json">
<div class="example-title" style="color:var(--blue);">httpbin.org/json</div>
<div class="example-desc">Returns a sample JSON response</div>
</div>
<div class="example-card" data-url="https://httpbin.org/status/404">
<div class="example-title" style="color:var(--red);">httpbin.org/status/404</div>
<div class="example-desc">Returns 404 Not Found status</div>
</div>
<div class="example-card" data-url="https://api.github.com/users/octocat">
<div class="example-title" style="color:var(--purple);">GitHub API: octocat</div>
<div class="example-desc">GitHub public API example</div>
</div>
<div class="example-card" data-url="https://httpbin.org/delay/2">
<div class="example-title" style="color:var(--orange);">httpbin.org/delay/2</div>
<div class="example-desc">2-second delayed response</div>
</div>
<div class="example-card" data-url="https://httpbin.org/status/200">
<div class="example-title" style="color:var(--green);">httpbin.org/status/200</div>
<div class="example-desc">Returns 200 OK status</div>
</div>
</div>
</div>
</div>
</div><!-- /page-wrap -->
<script src="masthead.js"></script>
<script src="hero-banner.js"></script>
<script src="author-card.js"></script>
<script>
(function() {
var urlInput = document.getElementById('url-input');
var methodSelect = document.getElementById('method-select');
var reqBodySection = document.getElementById('request-body-section');
var requestBody = document.getElementById('request-body');
var addHeaderBtn = document.getElementById('add-header-btn');
var headersContainer = document.getElementById('headers-container');
var sendRequestBtn = document.getElementById('send-request-btn');
var responsePanel = document.getElementById('response-panel');
var statusCode = document.getElementById('status-code');
var responseTime = document.getElementById('response-time');
var contentLength = document.getElementById('content-length');
var headersOutput = document.getElementById('headers-output');
var bodyOutput = document.getElementById('body-output');
var copyResponseBtn = document.getElementById('copy-response-btn');
var errBubble = document.getElementById('error-bubble');
var errMsg = document.getElementById('error-msg');
function showError(msg) { errMsg.textContent = msg; errBubble.classList.add('show'); }
function hideError() { errBubble.classList.remove('show'); }
methodSelect.addEventListener('change', function() {
var m = this.value;
if (m === 'POST' || m === 'PUT' || m === 'PATCH') {
reqBodySection.style.display = 'block';
} else {
reqBodySection.style.display = 'none';
}
});
addHeaderBtn.addEventListener('click', function() { addHeaderRow(); });
function addHeaderRow() {
var row = document.createElement('div');
row.className = 'header-row';
row.innerHTML =
'<input type="text" placeholder="Header Name" class="header-input hdr-name">' +
'<span class="header-sep">:</span>' +
'<input type="text" placeholder="Header Value" class="header-input hdr-val">' +
'<button type="button" class="header-remove">✕</button>';
row.querySelector('.header-remove').addEventListener('click', function() { row.remove(); });
headersContainer.appendChild(row);
}
// Example URL cards
var exampleCards = document.querySelectorAll('.example-card');
for (var i = 0; i < exampleCards.length; i++) {
exampleCards[i].addEventListener('click', function() {
urlInput.value = this.getAttribute('data-url');
});
}
sendRequestBtn.addEventListener('click', function() { sendRequest(); });
async function sendRequest() {
var url = urlInput.value.trim();
if (!url) { showError('Please enter a URL!'); return; }
hideError();
sendRequestBtn.disabled = true;
sendRequestBtn.textContent = '⏳ Sending...';
responsePanel.style.display = 'none';
try {
var startTime = Date.now();
// Collect custom headers
var headers = { 'Content-Type': 'application/json' };
var nameInputs = headersContainer.querySelectorAll('.hdr-name');
var valInputs = headersContainer.querySelectorAll('.hdr-val');
for (var i = 0; i < nameInputs.length; i++) {
var n = nameInputs[i].value.trim();
var v = valInputs[i].value.trim();
if (n && v) headers[n] = v;
}
var options = { method: methodSelect.value, headers: headers };
if (['POST','PUT','PATCH'].indexOf(methodSelect.value) !== -1 && requestBody.value.trim()) {
options.body = requestBody.value.trim();
}
var response;
try {
response = await fetch(url, options);
} catch (corsError) {
if (methodSelect.value !== 'GET') {
showError('CORS proxy only supports GET. Use a browser extension for other methods.');
return;
}
var proxyUrl = 'https://api.allorigins.win/get?url=' + encodeURIComponent(url);
var proxyResponse = await fetch(proxyUrl);
var proxyData = await proxyResponse.json();
response = {
status: proxyResponse.status,
statusText: proxyResponse.statusText,
headers: new Headers({ 'content-type': 'text/plain', 'x-proxied': 'true' }),
text: function() { return Promise.resolve(proxyData.contents || ''); }
};
}
var endTime = Date.now();
var elapsed = endTime - startTime;
var bodyText = '';
try { bodyText = await response.text(); } catch(e) { bodyText = 'Unable to read response body'; }
displayResponse(response, elapsed, bodyText);
} catch (err) {
showError('Request failed: ' + err.message);
} finally {
sendRequestBtn.disabled = false;
sendRequestBtn.textContent = '🚀 Send Request!';
}
}
function displayResponse(response, elapsed, body) {
// Status code with color
var sc = response.status;
statusCode.textContent = sc;
statusCode.style.color = sc >= 200 && sc < 300 ? 'var(--green)' :
sc >= 300 && sc < 400 ? 'var(--yellow)' :
sc >= 400 ? 'var(--red)' : 'var(--ink)';
responseTime.textContent = elapsed + 'ms';
var cl = response.headers.get('content-length');
contentLength.textContent = cl ? cl + ' bytes' : 'Unknown';
var headersText = '';
response.headers.forEach(function(value, key) { headersText += key + ': ' + value + '\n'; });
headersOutput.textContent = headersText;
var maxLen = 2000;
bodyOutput.textContent = body.length > maxLen ? body.substring(0, maxLen) + '\n\n... (truncated)' : body;
responsePanel.style.display = 'block';
}
copyResponseBtn.addEventListener('click', function() {
var text = 'Status: ' + statusCode.textContent + '\n' +
'Time: ' + responseTime.textContent + '\n' +
'Content-Length: ' + contentLength.textContent + '\n\n' +
'Headers:\n' + headersOutput.textContent + '\nBody:\n' + bodyOutput.textContent;
if (navigator.clipboard) navigator.clipboard.writeText(text).catch(function(){});
var orig = copyResponseBtn.textContent;
copyResponseBtn.textContent = '✔ COPIED!';
copyResponseBtn.style.background = 'var(--green)';
setTimeout(function() { copyResponseBtn.textContent = orig; copyResponseBtn.style.background = 'var(--ink)'; }, 1800);
});
// Preload
urlInput.value = 'https://httpbin.org/headers';
addHeaderRow();
})();
</script>
</body>
</html>