diff --git a/src/cli_v1.rs b/src/cli_v1.rs
index 3d45321..b594232 100644
--- a/src/cli_v1.rs
+++ b/src/cli_v1.rs
@@ -59,6 +59,10 @@ enum Command {
         #[arg(short, long)]
         output_dir: Option<Utf8PathBuf>,
 
+        /// Optional JSON object available in templates as `context`.
+        #[arg(long)]
+        context: Option<String>,
+
         /// Disable automatic postprocessing of the output (formatting and automatic style fixes).
         #[arg(long)]
         no_postprocess: bool,
@@ -136,12 +140,18 @@ pub fn run_cli_v1_main() -> anyhow::Result<()> {
         Command::Generate {
             template,
             output_dir,
+            context,
             no_postprocess,
             ..
         } => {
+            let context: Option<minijinja::Value> = context
+                .map(|s| serde_json::from_str(&s).context("invalid 'context' argument"))
+                .transpose()?;
+
             let generated_paths = match &output_dir {
                 Some(path) => {
-                    let generated_paths = generate(&api, template.into(), path, no_postprocess)?;
+                    let generated_paths =
+                        generate(&api, template.into(), path, context, no_postprocess)?;
                     println!("done! output written to {path}");
                     generated_paths
                 }
@@ -167,7 +177,8 @@ pub fn run_cli_v1_main() -> anyhow::Result<()> {
                         .try_into()
                         .context("non-UTF8 tempdir path")?;
 
-                    let generated_paths = generate(&api, template.into(), path, no_postprocess)?;
+                    let generated_paths =
+                        generate(&api, template.into(), path, context, no_postprocess)?;
                     println!("done! output written to {path}");
 
                     // Persist the TempDir if everything was successful
diff --git a/src/generator.rs b/src/generator.rs
index f7162a4..4431d2d 100644
--- a/src/generator.rs
+++ b/src/generator.rs
@@ -27,6 +27,7 @@ pub fn generate(
     api: &Api,
     tpl_name: String,
     output_dir: &Utf8Path,
+    context: Option<minijinja::Value>,
     no_postprocess: bool,
 ) -> anyhow::Result<Vec<Utf8PathBuf>> {
     let (name_without_jinja_suffix, tpl_path) = match tpl_name.strip_suffix(".jinja") {
@@ -58,6 +59,7 @@ pub fn generate(
             .parent()
             .with_context(|| format!("invalid template path `{tpl_path}`"))?,
     )?;
+    minijinja_env.add_global("context", context);
     minijinja_env.add_template(tpl_path, &tpl_source)?;
     let tpl = minijinja_env.get_template(tpl_path)?;