This is the most popular tool for the JS version. It is hosted on GitHub Pages and allows you to drag and drop your save files directly into your browser for instant editing.
Depending on whether you are playing the older Flash version or the modern JavaScript (JS) version of the game, your choice of editor will differ: trials in tainted space save editor
Before editing, make a copy of your original save. Save editing can lead to game-breaking bugs or corrupted files. This is the most popular tool for the JS version
If playing on sites like Fenoxo.com, use the in-game "Save to File" option to download a .json or .sol file to your computer. trials in tainted space save editor