History
Boxy SVG was originally designed for macOS and written in both Objective-C and CoffeeScript. The first version was published on 2013-03-15 on the Mac App Store.
The second version, released on 2014-08-01, was a complete rewrite in JavaScript and Electron to make the application work as both a web app in a browser and a regular desktop application.
The third major release (2017-06-06) introduced a new user interface based on Xel, an HTML5 widget toolkit.
Afterwards, the developers switched to a shorter release cycle, with new versions rolled out every 1 or 2 months.
Compatibility
The program uses SVG and SVGZ (zlib compressed version) as its native file formats. Some elements are in program's own namespace to either extend the feature set beyond what's available in the W3C SVG specification or provide a convenience layer for low-level details. Boxy SVG can also open SVG files authored with Inkscape and Adobe Illustrator, all software-specific elements and attributes will be dropped.
The application is based on the Electron framework and thus supports the same subset of the SVG format as Chromium-based web browsers such as Google Chrome, Microsoft Edge, and Opera. A major exception is the lack of support for animation. From version 4.58.0 it was added supports for Firefox as well.
Boxy SVG reads and writes PNG, JPEG, WebP, GIF, and PDF files, and reads Adobe Illustrator documents saved with the PDF compatibility mode on. Additionally, it can export HTML files.
