Simple VSCode extension for fixing almost all annoying JSON (and even JSONC!) problems.
supports virtual workspaces and web
small and no dependencies
simple and fast as it uses the errors you see
What fixes
All these fixes are configurable and can be disabled in settings:
Error Message
Action
Expected comma
Insert missing comma
Colon expected
Insert missing colon
Trailing comma
Remove trailing comma
Comments are not permitted in JSON. (json only)
Remove the whole comment (disabled by default)
Property keys must be doublequoted
Remove quotes (if have ' or `) and doublequote
Note: missing commas just placed before the error range. Its assumed you have autoformatter enabled to handle the "right placing"
In other words, it would run formatter on each save, however you can disable it via setting
Note 2: this extension though doesn't do autoquoting, there is vscode-fix-json for this.
Sometimes builtin JSON extension can be slow. In these cases you need to wait until errors are updated before fixing the file! We can do absolutely nothing about it.
Why not Prettier?
Prettier as formatter does great work on fixing trailing semicolons and quotes problems, however this extension is much faster and more aggressive overall.
Note: you can disable autofixing on save and instead run command whenever you want
