Web & marketing
Meta tags, WhatsApp links and helpers for shipping content online.
Meta Tag Generator
Generate SEO, Open Graph and Twitter Card meta tags for your page in one go. Live preview, ready to paste into your
. Open →WhatsApp Link Generator
Build a wa.me click-to-chat link with a pre-filled message and a scannable QR code. No app, no signup.
Open →User-Agent String Parser
Decode any User-Agent string into browser, OS, device, engine and CPU. Includes ready-made strings for desktops, phones and crawlers.
Open →HTTP Status Code Reference
Search and learn the meaning, typical cause and use case of every common HTTP status code, with cURL/Python/JS/PHP snippets.
Open →UTM Link Builder
Build, preview, and shorten campaign-tracked URLs with proper UTM parameters. Saves presets in your browser, never on a server.
Open →URL Parser
Decompose any URL into protocol, host, port, path, query and fragment — with IDN punycode decoding and query-pair extraction. Runs entirely in your browser.
Open →Open Graph Preview
See how a link will look when shared on Facebook, LinkedIn, X/Twitter, WhatsApp and Slack — and copy a clean meta-tag snippet for your own pages.
Open →Mailto Link Builder
Generate mailto: links with To, Cc, Bcc, subject and body — properly URL-encoded so line breaks, accents and emoji survive every email client.
HTML Entity Encoder & Decoder
Convert characters to and from HTML entities — named, decimal or hex, all special chars or only the unsafe five. Round-trip safe.
Open →JSON-LD Schema Builder
Build valid application/ld+json blocks for Article, Product, FAQPage, Recipe, Event, Organization and LocalBusiness — copy and paste into your <head>.