cfv is a toolchain for configuration files. It catches syntax errors, schema violations, and formatting problems across your repo and fixes what it can. Single static binary. No runtime dependencies.
brew install config-file-validatorgo install github.com/Boeing/config-file-validator/v3/cmd/cfv@latestWinget, Scoop, MacPorts, binary downloads
- Winget:
winget install Boeing.config-file-validator - Scoop:
scoop install config-file-validator - MacPorts:
sudo port install config-file-validator - Binaries: GitHub Releases
Validate syntax, enforce schemas, and check formatting:
cfv check .Fix formatting, trailing commas, and type coercion:
cfv check --fix .Preview formatting changes as a diff:
cfv format --diff .Exits with code 1 if any file fails.
| Format | Extensions | Syntax | Format | Schema |
|---|---|---|---|---|
| JSON | .json |
✅ | ✅ | ✅ |
| JSONC | .jsonc |
✅ | ✅ | ✅ |
| YAML | .yaml, .yml |
✅ | ✅ | ✅ |
| TOML | .toml |
✅ | ✅ | ✅ |
| XML | .xml |
✅ | ✅ | ✅ |
| TOON | .toon |
✅ | — | ✅ |
| SARIF | .sarif |
✅ | — | ✅ |
| HCL | .hcl, .tf, .tfvars |
✅ | ✅ | — |
| INI | .ini |
✅ | ✅ | — |
| Properties | .properties |
✅ | ✅ | — |
| ENV | .env |
✅ | ✅ | — |
| HOCON | .hocon |
✅ | — | — |
| CSV | .csv |
✅ | — | — |
| EDITORCONFIG | .editorconfig |
✅ | — | — |
| Justfile | .just |
✅ | — | — |
| KDL | .kdl |
✅ | — | — |
| CUE | .cue |
✅ | — | — |
| Apple PList XML | .plist |
✅ | — | — |
Schema validation uses JSON Schema, XSD, and automatic SchemaStore lookup. Formatting reads your existing .prettierrc, taplo.toml, .yamlfmt, and .editorconfig files. See Formatting and Schema Validation.
cfv check --reporter=junit:results.xml --schemastore .Reporters: standard, json, junit, sarif, github. The github reporter emits workflow commands so errors appear as inline PR annotations.
A GitHub Action and pre-commit hook are also available.
