elm-format vs Taplo

elm-format has no write-up on Specifiction yet; its figures are above.

Taplo is a free toolkit for validating, formatting, and querying TOML documents, with support for TOML 1.0.0. Its validator checks syntax and semantic issues such as duplicate keys, and can apply JSON Schema Draft 4 validation. The formatter can edit files in place or use standard input and output; by default, it stops when syntax errors occur to avoid destructive edits. The CLI also converts TOML to JSON and retrieves values through query expressions. Taplo’s language server communicates through standard input/output or TCP, though multiple TCP clients are not supported. It is excluded from default builds and is unavailable in the NPM installation. The Even Better TOML Visual Studio Code extension adds highlighting, validation, folding, navigation, renaming, formatting, and JSON Schema completion; its listing calls it a preview that may contain bugs or crash. Taplo can retrieve schemas from catalogs such as JSON Schema Store and match them to files by name. Install options include precompiled releases, Cargo, Homebrew, NPM, and Docker; precompiled releases are listed for Linux, macOS, and Windows.