Really simple tools

I put this collection of tools together mainly to sharpen my HTML, CSS, JavaScript and PHP skills. Let me know if you find them useful or if you have any suggestions.

• Browser info

  Get information about your browser

• Colour converter

  Convert hex colours to RGB and back

• DNS lookup

  Get DNS records for a hostname

• HTTP header checker

  Check HTTP headers for any URL

• Image converter

  Convert images into other formats

• IP address finder

  Find your public IP address

• MX lookup

  Get MX records for a hostname

• Password generator

  Generate a strong password

• Percentage calculator

  Work out percentage-based sums

• UTM URL builder

  Build tracked links for Google Analytics