https://w3lessons.info/2017/10/04/20-free-online-web-developer-tools/
1 Pingdom Website Speed Test 2 Browser Shots 3 Postman - make your API development faster & easier 4 Responsive Website Design Tester 5 Google Fonts CDN 6 .Htaccess Generator Online 7 Difference Checker 8 SubLime Text Editor 9 Embed Responsively 10 JSON Viewer 11 JPEGMINI - Compress JPG Files Online 12 Tiny PNG - Compress PNG images 13 Picture Resize Online 14 CSS Minifier 15 Javascript Minifier 16 CSS Media Query Generator 17 Awesome Screenshot 18 Dummy Image Generator 19 Crontab Generator 20 Creately Diagramming
origin - http://www.pipiscrew.com/?p=10360 20-popular-online-web-developer-tools-in-2017