diff --git a/lib/just/formatter-wrappers.just b/lib/just/formatter-wrappers.just
index 8ad5ef3..ac19590 100644
--- a/lib/just/formatter-wrappers.just
+++ b/lib/just/formatter-wrappers.just
@@ -7,3 +7,9 @@ _format-wrapper-statix *files:
     statix fix --config lib/tooling-config/statix.toml "$file"
   done
 
+_format-wrapper-jq *files:
+  #!/usr/bin/env sh
+  set -euxo pipefail
+  for file in {{files}}; do
+    echo "$file" | jq -S > "$file"
+  done
diff --git a/lib/tooling-config/treefmt.toml b/lib/tooling-config/treefmt.toml
index 683e1e8..e7d856e 100644
--- a/lib/tooling-config/treefmt.toml
+++ b/lib/tooling-config/treefmt.toml
@@ -24,6 +24,11 @@ command = "taplo"
 options = ["format"]
 includes = ["*.toml"]
 
+[formatter.jq]
+command = "just"
+options = ["_format-wrapper-jq"]
+includes = ["*.json", "*.jsonc"]
+
 [formatter.mdformat]
 command = "mdformat"
 includes = ["*.md"]