Webmaster Tools

Here are links of interest to anyone designing or maintaining web sites:

• Copyscape — Search for copies of a specific page on your site by entering its URL

• ORIGINALIY.AI — A Plagiarism Checker and AI Detector

• IP Finder provides geolocations of an IP address.
  Plus links to many other online tools.

• Image converters and compression:
  • WEBP to PNG Converter or WEPB to PNG. Then use TinyPNG to compress.
  • TinyPNG — WEBP, PNG and JPEG compression

• Other converters:
  • Convert Online Between Various File Formats
  • HTML to PDF
  • pdfcrowd
  • htmlpdf.com
  • sedja.com
  • DOCX to PDF
  • Free DOCX to PDF via PDFCandy
  • DOCX to PDF Convert DOCX files to PDF online & free
  • eBook to PDF
  • A good eBook to PDF Converter
• Sitemap validators:
  • Free XML Sitemap Validator
  • Validate an XML file

• Sitemap generators:
  • xml-sitemaps.com
  • web-site-map.com

• Doc Translator — Instantly translate and preserve the layout of any document format into any language. Free.

• JPEG & PNG Stripper  (Why use this? See here.)

• Xenu's Link Sleuth — Find broken links on web sites

• Service Uptime — website monitoring

• SuperMonitoring website monitor and a range of other services

• Website performance analysis by GTmetrix

• How to Use Wildcards in Robots.txt

• How to Make a Mobile-Friendly Website: Responsive Design in CSS — Using Media Queries and Viewport for a Mobile-Ready Design

• Website Planet — "For All of Your Website Solutions"

• Da Button Factory — buttons quick and easy

• Website speed test

• Google's PageSpeed Insights

• Google Indexed Pages Checker

• Miss How to start a blog

• Quick Sprout — basic but useful analysis of web pages.

• SimilarWeb — get bounce rate, average time on your site, and other useful statistics.

• Rapid PHP editor is a powerful, quick and sophisticated PHP editor.

• Small SEO Tools Includes a Backlink Checker.

• Open Site Explorer — find out who's linking to your website.

• A CSS-validator

• The Reaction Engine — a tool to analyse the SEO performance of a URI for a given keyphrase

• Down for everyone or just me?

• W3C Markup Validation Service

• The Side-by-Side SEO Comparison Tool

• WooRank — an online website analysis tool

• Pingdom Website Speed Test — Enter a URL to test the load time of a page, analyze it and find bottlenecks.

• SEO Workers Analysis Tool

• TimThumb — PHP Image Resizer

• Web Development Tools

• Compare Google and Yahoo! Search results

• Search Engine Optimization and SEO Tools