Web Tools

HTML, DigiPin and sitemap tools

Web tools help you build, test and manage websites. They are useful for developers, bloggers and site owners who want quick results without setting up a local project or installing software.

The HTML Viewer shows a live preview of your HTML code as you type, which is useful for testing snippets, email templates and layouts. The Sitemap.xml Generator creates a valid XML sitemap from your list of URLs, with priority, change frequency and last modified dates, so search engines can find and index your pages. My Digipin converts latitude and longitude into India's DIGIPIN digital address code and back again.

HTML Viewer

The HTML Viewer Tool is a powerful online editor that allows you to write, preview, and edit HTML code in real-time. Perfect for developers, designers, and learners, this tool provides an instant visual output of your code, making it easy to test snippets, debug layouts, or experiment with new designs. With built-in templates for common use cases—such as responsive pages, contact forms, and Bootstrap starters—you can jumpstart your projects quickly. Additional features like HTML formatting, code downloading, and one-click copying streamline your workflow, while the toggleable edit/view modes let you focus on either coding or reviewing. Whether you're prototyping a webpage, teaching HTML concepts, or fine-tuning markup, this tool offers a fast, intuitive, and clutter-free environment to bring your ideas to life.

My Digipin

DIGIPIN, or Digital Postal Index Number, is a standardized, geo-coded, grid-based digital address system officially launched by India’s Department of Posts. This system is designed to revolutionize location identification, especially in areas with ambiguous or incomplete addresses, and to enhance various public and private services.

Meta Tag Generator

NinjaFunction's Meta Tag Generator writes the head tags a web page needs: title, description, robots, canonical link, Open Graph tags and X (Twitter) card tags. Helpful hints show if the title or description is too short or too long, and live previews show how the page may look in Google results and when shared on Facebook, LinkedIn and X. Copy the code in one click. The tags are written in your browser, so nothing you enter is sent to a server.

What Is My Screen Resolution

NinjaFunction's screen resolution checker shows the size of your screen, the size of your browser window, the available screen, the device pixel ratio, an estimate of the real pixels, colour depth, orientation, touch support and your light or dark theme setting. The numbers update live when you resize the window or turn your phone, and you can copy any of them or all of them at once. The details are read in your browser and are not sent anywhere.

robots.txt Generator

NinjaFunction's robots.txt Generator builds a robots.txt file for your website. Start from a ready-made setup such as WordPress or an online shop, add rules for any crawler, block well-known AI crawlers with one click, and add your sitemap address. A built-in tester checks any address against your rules the way Google does, using the longest matching rule. Copy the result or download robots.txt. Nothing is sent anywhere.

Open Graph Preview Checker

NinjaFunction's Open Graph Preview Checker shows how your link will look when shared. Paste your page source or head tags and see close previews for Facebook and LinkedIn, X (Twitter), WhatsApp and Google. A check list reviews og:title, og:description, og:image, og:url and twitter:card, loads your picture to check its size and shape, and lists every tag it found. Your page is read in your browser and never uploaded.

Sitemap.xml Generator

NinjaFunction's Sitemap.xml Generator lets you paste your website URLs and instantly generate a valid XML sitemap. Set priority, change frequency, and lastmod for each URL, preview the XML live, and download the file. Everything runs locally — no URLs are sent to any server.

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What is digipin?
DIGIPIN, or Digital Postal Index Number, is a standardized, geo-coded, grid-based digital address system officially launched by India's Department of Posts.

Frequently Asked Questions

What is an XML sitemap and do I need one?

An XML sitemap is a file that lists the important pages of your website so search engines like Google can find and index them. It is especially helpful for new websites, large sites and pages that are not well linked from other pages.

How do I submit my sitemap to Google?

Upload the sitemap.xml file to the root of your website, then add its address in Google Search Console under Sitemaps. You can also add a line such as Sitemap: https://example.com/sitemap.xml to your robots.txt file.

Can I test HTML without a code editor?

Yes. Paste your code into the HTML Viewer and see the result instantly in your browser. It is a quick way to check a snippet or template before adding it to your website.