GTmetrix is an amazing must use tool for analysing your websites overall speed and performance. It will give you overall ratings based on different metrics on how your websites and pages load for others.
W3C Validation tool is a free to use mark up service that helps you validate your websites code. It’s important to check your sites are fully validated as it can improve the way your site displays and ranks.
I use macs for all my coding so my chosen HTML editor is Komodo. It’s very clean, simple and easy to use. You can install their basic version for free and its a must use essential tool for editing code.
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