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Web apps and services list for web developers

List of web applications and services that could prove useful for web developers. Among the topics covered are various CSS code generators, file type conversion tools,  website reports for performance, security, accessibility, SEO and other metrics. This page will be periodically updated.

Sprite generators
  • Retina Sprite Generator – Generate retina and standard sprite images online. Get your retina ready CSS codes instantly.
Design
  • CSS3 Patterns – Browse and edit gallery of pure CSS patterns.
  • Patternify – Design patterns and save them as a PNG image or as Base64 encoded image for CSS use.
  • PIXLR Editor – Web based alternative to PhotoShop. Work in layers, replace color, transform objects, and more – all from your browser.
  • PIXLR Express – Apply a quick fix or add a personal touch with creative effects, overlays, and borders to pictures.
CSS code generators
Conversion tools
  • ICO Convert – Icon maker and favicon generator. Create a multi-size Windows icon from different png images.
  • Base64 Image – Convert images to Base64 encoding so they can be embedded using img tags or CSS, speeding up load times for smaller images by preventing additional HTTP requests.
  • Vectorizer – Convert raster images like PNGs, BMPs and JPEGs to scalable vector graphics (SVG).
Media queries
  • MQtest – A tool to help identify which media queries your device responds to.
Regular expressions tools
  • Debuggex – Online regex tester with regular expression visualization.
  • RegexTester – Online regex tester.
Website performance, security, mobile friendly and other checks
  • Pingdom Website Speed Test – Test the load time of a web page, analyze it and find bottlenecks.
  • GTMetrix – Analyzes your site’s speed and provides recommendations on how to optimize it.
  • Google PageSpeed Insights – Identify ways to make your site faster and more mobile-friendly. Automatically generates minified HTML, CSS, JS files and optimized image files.
  • Sonar – Check websites for security, accessibility, interoperability and performance issues.
  • Google Mobile Friendly Test – Check if your web page is mobile-friendly.
Website privacy
  • WebbKoll – This tool helps you check what data-protecting measures a site has taken to help you exercise control over your privacy.
Website SEO
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