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Most WordPress screenshot plugins are heavy, outdated, and rely on free screenshot services that return low-quality results. The Allscreenshots API gives you pixel-perfect captures with a lightweight shortcode — no plugin bloat required.
A WordPress shortcode that lets you embed website screenshots anywhere on your site: [screenshot url="https://example.com"]. It captures the page on first load and caches the result so it doesn't re-capture on every page view.
functions.php or add a custom pluginAdd this line to your wp-config.php file (above the "That's all, stop editing!" comment):
define('SCREENSHOT_API_KEY', 'your-api-key-here');Replace your-api-key-here with your actual API key.
Add this code to your theme's functions.php file, or create a simple custom plugin:
function allscreenshots_capture($atts) {
$atts = shortcode_atts([
'url' => '',
'width' => 1280,
'height' => 800,
'fullpage' => 'false',
'class' => 'screenshot-embed',
], $atts);
if (empty($atts['url'])) {
return '<!-- screenshot: no URL provided -->';
}
// Check cache first
$cache_key = 'ascr_' . md5($atts['url'] . $atts['width'] . $atts['fullpage']);
$screenshot_url = get_transient($cache_key);
if (!$screenshot_url) {
$response = wp_remote_post(
'https://api.allscreenshots.com/v1/screenshot',
[
'timeout' => 30,
'headers' => [
'Authorization' => 'Bearer ' . SCREENSHOT_API_KEY,
'Content-Type' => 'application/json',
],
'body' => wp_json_encode([
'url' => esc_url_raw($atts['url']),
'fullPage' => $atts['fullpage'] === 'true',
'viewport' => [
'width' => absint($atts['width']),
'height' => absint($atts['height']),
],
'blockAds' => true,
]),
]
);
if (is_wp_error($response)) {
return '<!-- screenshot: API error -->';
}
$body = json_decode(wp_remote_retrieve_body($response), true);
if (empty($body['screenshotUrl'])) {
return '<!-- screenshot: no URL returned -->';
}
$screenshot_url = $body['screenshotUrl'];
set_transient($cache_key, $screenshot_url, DAY_IN_SECONDS);
}
return sprintf(
'<img src="%s" alt="Screenshot of %s" class="%s" loading="lazy" />',
esc_url($screenshot_url),
esc_attr($atts['url']),
esc_attr($atts['class'])
);
}
add_shortcode('screenshot', 'allscreenshots_capture');In any post or page, use the shortcode:
[screenshot url="https://example.com"]
With options:
[screenshot url="https://example.com" width="1920" fullpage="true" class="my-screenshot"]
The first time a visitor loads the page, the screenshot is captured and cached for 24 hours. Subsequent page loads use the cached URL.
In the Gutenberg editor, add a Shortcode block and paste the shortcode. The screenshot renders on the frontend.
The shortcode works in any page builder:
By default, screenshots are cached for 24 hours. To change this, modify the set_transient call:
// Cache for 1 week
set_transient($cache_key, $screenshot_url, WEEK_IN_SECONDS);
// Cache for 1 hour
set_transient($cache_key, $screenshot_url, HOUR_IN_SECONDS);
// No cache (captures on every page load — not recommended)
// Remove the get_transient/set_transient logicTo force a re-capture, you can clear WordPress transients:
// Add this as a helper function
function clear_screenshot_cache($url) {
$cache_key = 'ascr_' . md5($url . '1280' . 'false');
delete_transient($cache_key);
}Or clear all screenshot caches at once via the database:
DELETE FROM wp_options WHERE option_name LIKE '_transient_ascr_%';If you're building a link directory or resource page, combine the shortcode with a custom post type or ACF fields:
// In your template file
$websites = get_posts(['post_type' => 'website', 'numberposts' => -1]);
foreach ($websites as $site) {
$url = get_field('website_url', $site->ID);
echo '<div class="website-card">';
echo '<h3>' . esc_html($site->post_title) . '</h3>';
echo do_shortcode('[screenshot url="' . esc_url($url) . '"]');
echo '</div>';
}Most WordPress screenshot plugins have drawbacks:
The shortcode approach above is about 50 lines of code, has zero dependencies, caches aggressively, and uses a production-grade screenshot API.
A lightweight shortcode beats a bloated plugin. You get pixel-perfect screenshots, aggressive caching, and full control over the rendering options — viewport size, full-page capture, dark mode, and more.
For the complete integration guide, see the WordPress integration page.