Knight Dev Tools

Developer Tools

12+ powerful dev tools — JSON formatter, color picker, meta tags, QR generator, robots.txt, sitemap builder, source viewer and more. All free, no login.

11 Tools Free Forever No Signup Browser Based

Popular

JSON Formatter

Format, validate, beautify, and minify JSON. Syntax highlighting and error detection built in.

Use Tool → Free

Source Code Viewer

View the HTML source code of any public website. Enter a URL and inspect the raw HTML instantly.

Use Tool → Free

Color Picker

Pick any color and get HEX, RGB, HSL, HSV values. Generate shades, tints, and complementary colors.

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Meta Tag Generator

Generate complete SEO meta tags, Open Graph, and Twitter Card tags. Copy-paste ready HTML output.

Use Tool → New

Open Graph Preview

Preview how your website looks when shared on Facebook, Twitter, LinkedIn, and WhatsApp.

Use Tool → Free

Robots.txt Generator

Generate a production-ready robots.txt file. Control which pages search engines can and cannot crawl.

Use Tool → Free

Sitemap Generator

Generate an XML sitemap for your website. Add URLs, set priority, change frequency, and download.

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QR Code Generator

Generate QR codes for URLs, text, WiFi, email, phone. Customize color and size. Download PNG free.

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Img2URL Uploader

Upload images and get a permanent public URL via ImgBB. Copy link, delete URL, drag & drop or paste.

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Image Converter

Convert images between PNG, JPG, WebP, ICO and SVG in your browser. Generate favicons, get a public URL.

Use Tool → Free

AdSense Calculator

Estimate your Google AdSense monthly revenue based on page views, CTR, and CPC. Plan your blog income.

Use Tool → New

Website Screenshot

Capture a screenshot of any public website by entering its URL. Preview how any webpage looks.

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Also Available

Utility Tools

16+ everyday tools — password generator, age calculator, BMI, currency converter, image resizer, image to PDF and more. All free.

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