diff --git a/src/blog_post/convert.rs b/src/blog_post/convert.rs
new file mode 100644
index 0000000..128dd04
--- /dev/null
+++ b/src/blog_post/convert.rs
@@ -0,0 +1,8 @@
+use super::render_context::RenderBlogPost;
+use super::BlogPost;
+
+pub(crate) fn convert_blog_post_to_render_context(post: &BlogPost) -> RenderBlogPost {
+    RenderBlogPost {
+        id: post.id.clone(),
+    }
+}
diff --git a/src/blog_post/definition.rs b/src/blog_post/definition.rs
index 5179858..087beef 100644
--- a/src/blog_post/definition.rs
+++ b/src/blog_post/definition.rs
@@ -8,7 +8,7 @@ use crate::error::CustomError;
 
 #[derive(Debug)]
 pub(crate) struct BlogPost {
-    id: String,
+    pub(crate) id: String,
 }
 
 impl BlogPost {
diff --git a/src/blog_post/mod.rs b/src/blog_post/mod.rs
index 687edec..0962dda 100644
--- a/src/blog_post/mod.rs
+++ b/src/blog_post/mod.rs
@@ -1,3 +1,5 @@
+mod convert;
 mod definition;
 mod render_context;
+pub(crate) use convert::convert_blog_post_to_render_context;
 pub(crate) use definition::BlogPost;
diff --git a/src/blog_post/render_context.rs b/src/blog_post/render_context.rs
index e2562d0..27fe4e4 100644
--- a/src/blog_post/render_context.rs
+++ b/src/blog_post/render_context.rs
@@ -4,5 +4,5 @@ use serde::Serialize;
 #[serde(tag = "type")]
 #[serde(rename = "blog_post")]
 pub(crate) struct RenderBlogPost {
-    id: String,
+    pub(crate) id: String,
 }
diff --git a/src/command/build/runner.rs b/src/command/build/runner.rs
index ecb97b8..f665bc5 100644
--- a/src/command/build/runner.rs
+++ b/src/command/build/runner.rs
@@ -1,5 +1,6 @@
 use std::path::PathBuf;
 
+use crate::blog_post::convert_blog_post_to_render_context;
 use crate::blog_post::BlogPost;
 use crate::cli::parameters::BuildArgs;
 use crate::config::Config;
@@ -7,17 +8,14 @@ use crate::error::CustomError;
 
 pub(crate) async fn build_site(args: BuildArgs) -> Result<(), CustomError> {
     let config = Config::load_from_file(args.config).await?;
-    let root_directory = config.get_root_directory().to_owned();
-    let output_directory = get_output_directory(&config).await?;
-    let post_directories = get_post_directories(&config).await?;
-    let load_jobs = post_directories
-        .into_iter()
-        .map(|path| tokio::spawn(BlogPost::load_blog_post(root_directory.clone(), path)));
-    let mut blog_posts = Vec::new();
-    for job in load_jobs {
-        blog_posts.push(job.await??);
-    }
+    let blog_posts = load_blog_posts(&config).await?;
     println!("{:?}", blog_posts);
+
+    for blog_post in &blog_posts {
+        let render_context = convert_blog_post_to_render_context(blog_post);
+        println!("{}", serde_json::to_string(&render_context)?);
+    }
+
     Ok(())
 }
 
@@ -51,3 +49,16 @@ async fn get_post_directories(config: &Config) -> Result<Vec<PathBuf>, CustomErr
     }
     Ok(ret)
 }
+
+async fn load_blog_posts(config: &Config) -> Result<Vec<BlogPost>, CustomError> {
+    let root_directory = config.get_root_directory().to_owned();
+    let post_directories = get_post_directories(&config).await?;
+    let load_jobs = post_directories
+        .into_iter()
+        .map(|path| tokio::spawn(BlogPost::load_blog_post(root_directory.clone(), path)));
+    let mut blog_posts = Vec::new();
+    for job in load_jobs {
+        blog_posts.push(job.await??);
+    }
+    Ok(blog_posts)
+}
diff --git a/src/error/error.rs b/src/error/error.rs
index 130f283..78f109f 100644
--- a/src/error/error.rs
+++ b/src/error/error.rs
@@ -6,6 +6,7 @@ pub(crate) enum CustomError {
     TomlDeserialize(toml::de::Error),
     WalkDir(walkdir::Error),
     Tokio(tokio::task::JoinError),
+    Serde(serde_json::Error),
 }
 
 impl From<std::io::Error> for CustomError {
@@ -43,3 +44,9 @@ impl From<tokio::task::JoinError> for CustomError {
         CustomError::Tokio(value)
     }
 }
+
+impl From<serde_json::Error> for CustomError {
+    fn from(value: serde_json::Error) -> Self {
+        CustomError::Serde(value)
+    }
+}