This plugin has been closed as of January 26, 2018 and is not available for download. Reason: Security Issue.
Synchi is excellent code editor. This plugin full compatible with WP 4.7.4.
The developer, @mdjekic, has made it clear that he no longer intends to support this plugin. That is his right. Just be aware of it. I recommend WP Editor instead. It does everything Synchi does and more. It integrates the CodeMirror editor, and has AJAX file system integration, including being able to preview image files in a FancyBox. And, it’s fully supported.
I appreciate the work that has gone into this plugin. And I was excited to stumble across it. I've been using HTML Editor Syntax Highlighter and like it but have a couple minor problems with it. So I was willing to change plugins. I like the idea of code completion, folders, goto line, regex search & replace, and the keyboard shortcuts. However, two major pitfalls are that I can't use multiple cursors like I can with HTML Editor Syntax Highlighter (HESH) and that's huge for me! Also, I can't use [Cmd + S] to save the page or post and I use that all the time too with HESH. Also, I used CSS with HESH to style the syntax highlighting the way I wanted to match my syntax theme in Sublime Text. With this plugin, I don't like the limited syntax themes available and that I can't create my own.
Sometimes, we need support the customers, we need this in case no FTP info not give. So helpful.