diff --git a/pkgs/development/python-modules/condense-json/default.nix b/pkgs/development/python-modules/condense-json/default.nix
new file mode 100644
index 000000000000..422aa5dacf2d
--- /dev/null
+++ b/pkgs/development/python-modules/condense-json/default.nix
@@ -0,0 +1,37 @@
+{
+  lib,
+  buildPythonPackage,
+  fetchFromGitHub,
+  setuptools,
+  pytestCheckHook,
+}:
+buildPythonPackage rec {
+  pname = "condense-json";
+  version = "0.1.2";
+  pyproject = true;
+
+  src = fetchFromGitHub {
+    owner = "simonw";
+    repo = "condense-json";
+    tag = version;
+    hash = "sha256-eZ8d8N7k8VL7dFkORHmp7JmHM1/11Km8BCriWw/LiwE=";
+  };
+
+  build-system = [
+    setuptools
+  ];
+
+  nativeCheckInputs = [
+    pytestCheckHook
+  ];
+
+  pythonImportsCheck = [ "condense_json" ];
+
+  meta = {
+    description = "Python function for condensing JSON using replacement strings";
+    homepage = "https://github.com/simonw/condense-json";
+    changelog = "https://github.com/simonw/condense-json/releases/tag/${src.tag}";
+    license = lib.licenses.asl20;
+    maintainers = with lib.maintainers; [ josh ];
+  };
+}
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 83003a8ff767..41407ad1c17f 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -2739,6 +2739,8 @@ self: super: with self; {
 
   conda-package-streaming = callPackage ../development/python-modules/conda-package-streaming { };
 
+  condense-json = callPackage ../development/python-modules/condense-json { };
+
   conduit = callPackage ../development/python-modules/conduit { };
 
   conduit-mpi = callPackage ../development/python-modules/conduit { mpiSupport = true; };