diff --git a/Cargo.toml b/Cargo.toml
index 4789914..f586abc 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -5,9 +5,8 @@ edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
-[features]
-serde = ["dep:serde"]
 
 [dependencies]
-serde = { version = "1.0.197", features = ["derive"], optional = true }
-zip = "0.6.6"
+serde = { version = "1.0.197", features = ["derive"] }
+serde_json = "1.0.114"
+zip = { version = "0.6.6", default-features = false, features = ["deflate", "time"] }
diff --git a/src/datapack/command.rs b/src/datapack/command.rs
new file mode 100644
index 0000000..a3c431f
--- /dev/null
+++ b/src/datapack/command.rs
@@ -0,0 +1,54 @@
+//! Represents a command that can be included in a function.
+
+use serde::{Deserialize, Serialize};
+
+use crate::util::compile::{CompileOptions, MutCompilerState, MutFunctionCompilerState};
+
+/// Represents a command that can be included in a function.
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub enum Command {
+    /// A command that is already formatted as a string.
+    Raw(String),
+    /// Message to be printed only in debug mode
+    Debug(String),
+}
+
+impl Command {
+    /// Create a new raw command.
+    pub fn raw(command: &str) -> Self {
+        Self::Raw(command.to_string())
+    }
+
+    /// Compile the command into a string.
+    pub fn compile(
+        &self,
+        options: &CompileOptions,
+        global_state: &MutCompilerState,
+        function_state: &MutFunctionCompilerState,
+    ) -> String {
+        let _ = options;
+        let _ = global_state;
+        let _ = function_state;
+        match self {
+            Self::Raw(command) => command.clone(),
+            Self::Debug(message) => compile_debug(message, options),
+        }
+    }
+}
+
+impl From<&str> for Command {
+    fn from(command: &str) -> Self {
+        Self::raw(command)
+    }
+}
+
+fn compile_debug(message: &str, option: &CompileOptions) -> String {
+    if option.debug {
+        format!(
+            r#"tellraw @a [{{"text":"[","color":"dark_blue"}},{{"text":"DEBUG","color":"dark_green","hoverEvent":{{"action":"show_text","value":[{{"text":"Debug message generated by Shulkerbox"}},{{"text":"\nSet debug message to 'false' to disable"}}]}}}},{{"text":"]","color":"dark_blue"}},{{"text":" {}","color":"black"}}]"#,
+            message
+        )
+    } else {
+        String::new()
+    }
+}
diff --git a/src/datapack/function.rs b/src/datapack/function.rs
new file mode 100644
index 0000000..f81354d
--- /dev/null
+++ b/src/datapack/function.rs
@@ -0,0 +1,48 @@
+//! Function struct and implementation
+
+use std::sync::Mutex;
+
+use serde::{Deserialize, Serialize};
+
+use crate::{
+    util::compile::{CompileOptions, FunctionCompilerState, MutCompilerState},
+    virtual_fs::VFile,
+};
+
+use super::command::Command;
+
+/// Function that can be called by a command
+#[derive(Debug, Clone, Default, Serialize, Deserialize)]
+pub struct Function {
+    commands: Vec<Command>,
+}
+
+impl Function {
+    /// Create a new function.
+    pub fn new() -> Self {
+        Self::default()
+    }
+
+    /// Add a command to the function.
+    pub fn add_command(&mut self, command: Command) {
+        self.commands.push(command);
+    }
+
+    /// Get the commands of the function.
+    pub fn get_commands(&self) -> &Vec<Command> {
+        &self.commands
+    }
+
+    /// Compile the function into a virtual file.
+    pub fn compile(&self, options: &CompileOptions, state: &MutCompilerState) -> VFile {
+        let function_state = Mutex::new(FunctionCompilerState::default());
+
+        let content = self
+            .commands
+            .iter()
+            .map(|c| c.compile(options, state, &function_state))
+            .collect::<Vec<String>>()
+            .join("\n");
+        VFile::Text(content)
+    }
+}
diff --git a/src/datapack/mod.rs b/src/datapack/mod.rs
new file mode 100644
index 0000000..935389d
--- /dev/null
+++ b/src/datapack/mod.rs
@@ -0,0 +1,156 @@
+//! Datapack module for creating and managing Minecraft datapacks.
+
+mod command;
+mod function;
+mod namespace;
+pub mod tag;
+pub use command::Command;
+pub use function::Function;
+pub use namespace::Namespace;
+use serde::{Deserialize, Serialize};
+
+use std::{collections::HashMap, ops::RangeInclusive, path::Path, sync::Mutex};
+
+use crate::{
+    util::compile::{CompileOptions, CompilerState, MutCompilerState},
+    virtual_fs::{VFile, VFolder},
+};
+
+/// A Minecraft datapack.
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct Datapack {
+    // TODO: Support filter and overlays
+    name: String,
+    description: String,
+    pack_format: u8,
+    supported_formats: Option<RangeInclusive<u8>>,
+    namespaces: HashMap<String, Namespace>,
+    tick: Vec<String>,
+    load: Vec<String>,
+    custom_files: VFolder,
+}
+
+impl Datapack {
+    /// Create a new Minecraft datapack.
+    pub fn new(name: &str, pack_format: u8) -> Self {
+        Self {
+            name: name.to_string(),
+            description: String::from("A Minecraft datapack created with shulkerbox"),
+            pack_format,
+            supported_formats: None,
+            namespaces: HashMap::new(),
+            tick: Vec::new(),
+            load: Vec::new(),
+            custom_files: VFolder::new(),
+        }
+    }
+
+    /// Set the description of the datapack.
+    pub fn with_description(self, description: &str) -> Self {
+        Self {
+            description: description.to_string(),
+            ..self
+        }
+    }
+
+    /// Set the supported pack formats of the datapack.
+    pub fn with_supported_formats(self, supported_formats: RangeInclusive<u8>) -> Self {
+        Self {
+            supported_formats: Some(supported_formats),
+            ..self
+        }
+    }
+
+    /// Set the custom files of the datapack.
+    pub fn with_template_folder(self, path: &Path) -> std::io::Result<Self> {
+        let mut template = VFolder::try_from(path)?;
+        template.merge(self.custom_files);
+
+        Ok(Self {
+            custom_files: template,
+            ..self
+        })
+    }
+
+    /// Add a namespace to the datapack.
+    pub fn add_namespace(&mut self, namespace: Namespace) {
+        if !namespace.get_main_function().get_commands().is_empty() {
+            self.add_tick(&format!("{}:main", namespace.get_name()));
+        }
+        self.namespaces
+            .insert(namespace.get_name().to_string(), namespace);
+    }
+
+    /// Add a function to the tick function list.
+    pub fn add_tick(&mut self, function: &str) {
+        self.tick.push(function.to_string());
+    }
+
+    /// Add a function to the load function list.
+    pub fn add_load(&mut self, function: &str) {
+        self.load.push(function.to_string());
+    }
+
+    /// Add a custom file to the datapack.
+    pub fn add_custom_file(&mut self, path: &str, file: VFile) {
+        self.custom_files.add_file(path, file);
+    }
+
+    /// Compile the pack into a virtual folder.
+    pub fn compile(&self, options: &CompileOptions) -> VFolder {
+        let compiler_state = Mutex::new(CompilerState::default());
+
+        let mut root_folder = self.custom_files.clone();
+        let mcmeta = generate_mcmeta(self, options, &compiler_state);
+        root_folder.add_file("pack.mcmeta", mcmeta);
+        let mut data_folder = VFolder::new();
+
+        // Compile namespaces
+        for (name, namespace) in &self.namespaces {
+            let namespace_folder = namespace.compile(options, &compiler_state);
+            data_folder.add_existing_folder(name, namespace_folder);
+        }
+
+        // Compile tick and load tag
+        if !self.tick.is_empty() {
+            let mut tick_tag = tag::Tag::new(tag::TagType::Functions, false);
+            for function in &self.tick {
+                tick_tag.add_value(tag::TagValue::Simple(function.to_owned()));
+            }
+            data_folder.add_file(
+                "minecraft/tags/functions/tick.json",
+                tick_tag.compile_no_state(options).1,
+            );
+        }
+        if !self.load.is_empty() {
+            let mut load_tag = tag::Tag::new(tag::TagType::Functions, false);
+            for function in &self.tick {
+                load_tag.add_value(tag::TagValue::Simple(function.to_owned()));
+            }
+            data_folder.add_file(
+                "minecraft/tags/functions/load.json",
+                load_tag.compile_no_state(options).1,
+            );
+        }
+
+        root_folder.add_existing_folder("data", data_folder);
+        root_folder
+    }
+}
+
+fn generate_mcmeta(dp: &Datapack, _options: &CompileOptions, _state: &MutCompilerState) -> VFile {
+    let mut content = serde_json::json!({
+        "pack": {
+            "description": dp.description,
+            "pack_format": dp.pack_format
+        }
+    });
+    if let Some(supported_formats) = &dp.supported_formats {
+        content["pack"]["supported_formats"] = serde_json::json!({
+            "min_inclusive": *supported_formats.start(),
+            "max_inclusive": *supported_formats.end()
+        })
+    }
+
+    VFile::Text(content.to_string())
+}
diff --git a/src/datapack/namespace.rs b/src/datapack/namespace.rs
new file mode 100644
index 0000000..699e03e
--- /dev/null
+++ b/src/datapack/namespace.rs
@@ -0,0 +1,93 @@
+//! Namespace of a datapack
+
+use serde::{Deserialize, Serialize};
+
+use crate::{
+    util::compile::{CompileOptions, MutCompilerState},
+    virtual_fs::VFolder,
+};
+
+use super::{function::Function, tag::Tag};
+use std::collections::HashMap;
+
+/// Namespace of a datapack
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct Namespace {
+    name: String,
+    functions: HashMap<String, Function>,
+    main_function: Function,
+    tags: HashMap<String, Tag>,
+}
+
+impl Namespace {
+    /// Create a new namespace.
+    pub fn new(name: &str) -> Self {
+        Self {
+            name: name.to_string(),
+            functions: HashMap::new(),
+            main_function: Function::default(),
+            tags: HashMap::new(),
+        }
+    }
+
+    /// Get the name of the namespace.
+    pub fn get_name(&self) -> &str {
+        &self.name
+    }
+
+    /// Get the main function of the namespace.
+    pub fn get_main_function(&self) -> &Function {
+        &self.main_function
+    }
+    /// Get the main function of the namespace mutably.
+    pub fn get_main_function_mut(&mut self) -> &mut Function {
+        &mut self.main_function
+    }
+
+    /// Get the functions of the namespace.
+    pub fn get_functions(&self) -> &HashMap<String, Function> {
+        &self.functions
+    }
+
+    /// Get the tags of the namespace.
+    pub fn get_tags(&self) -> &HashMap<String, Tag> {
+        &self.tags
+    }
+
+    /// Add a function to the namespace.
+    pub fn add_function(&mut self, name: &str, function: Function) {
+        self.functions.insert(name.to_string(), function);
+    }
+
+    /// Add a tag to the namespace.
+    pub fn add_tag(&mut self, name: &str, tag: Tag) {
+        self.tags.insert(name.to_string(), tag);
+    }
+
+    /// Compile the namespace into a virtual folder.
+    pub fn compile(&self, options: &CompileOptions, state: &MutCompilerState) -> VFolder {
+        let mut root_folder = VFolder::new();
+
+        // Compile functions
+        for (path, function) in &self.functions {
+            root_folder.add_file(
+                &format!("functions/{}.mcfunction", path),
+                function.compile(options, state),
+            );
+        }
+        if !self.main_function.get_commands().is_empty() {
+            root_folder.add_file(
+                "functions/main.mcfunction",
+                self.main_function.compile(options, state),
+            );
+        }
+
+        // Compile tags
+        for (path, tag) in &self.tags {
+            let (tag_type, vfile) = tag.compile(options, state);
+            root_folder.add_file(&format!("tags/{}/{}.json", tag_type, path), vfile);
+        }
+
+        root_folder
+    }
+}
diff --git a/src/datapack/tag.rs b/src/datapack/tag.rs
new file mode 100644
index 0000000..a57ac36
--- /dev/null
+++ b/src/datapack/tag.rs
@@ -0,0 +1,114 @@
+//! A tag for various types.
+
+use serde::{Deserialize, Serialize};
+
+use crate::{
+    util::compile::{CompileOptions, MutCompilerState},
+    virtual_fs::VFile,
+};
+
+/// A tag for various types.
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct Tag {
+    r#type: TagType,
+    replace: bool,
+    values: Vec<TagValue>,
+}
+impl Tag {
+    /// Create a new tag.
+    pub fn new(r#type: TagType, replace: bool) -> Self {
+        Self {
+            r#type,
+            replace,
+            values: Vec::new(),
+        }
+    }
+
+    /// Add a value to the tag.
+    pub fn add_value(&mut self, value: TagValue) {
+        self.values.push(value);
+    }
+
+    /// Compile the tag into a virtual file without state
+    pub fn compile_no_state(&self, _options: &CompileOptions) -> (String, VFile) {
+        let json = serde_json::json!({
+            "replace": self.replace,
+            "values": self.values.iter().map(TagValue::compile).collect::<Vec<_>>()
+        });
+        let type_str = self.r#type.to_string();
+        let vfile = VFile::Text(serde_json::to_string(&json).expect("Failed to serialize tag"));
+
+        (type_str, vfile)
+    }
+
+    /// Compile the tag into a virtual file.
+    pub fn compile(&self, options: &CompileOptions, _state: &MutCompilerState) -> (String, VFile) {
+        self.compile_no_state(options)
+    }
+}
+
+/// The type of a tag.
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub enum TagType {
+    /// A tag for blocks.
+    Blocks,
+    /// A tag for fluids.
+    Fluids,
+    /// A tag for items.
+    Items,
+    /// A tag for entities.
+    Entities,
+    /// A tag for game events.
+    GameEvents,
+    /// A tag for functions.
+    Functions,
+    /// A custom tag
+    /// `Others(<registry path>)` => `data/<namespace>/tags/<registry path>`
+    Others(String),
+}
+impl ToString for TagType {
+    fn to_string(&self) -> String {
+        match self {
+            Self::Blocks => "blocks".to_string(),
+            Self::Fluids => "fluids".to_string(),
+            Self::Items => "items".to_string(),
+            Self::Entities => "entity_types".to_string(),
+            Self::GameEvents => "game_events".to_string(),
+            Self::Functions => "functions".to_string(),
+            Self::Others(path) => path.to_string(),
+        }
+    }
+}
+
+/// The value of a tag.
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub enum TagValue {
+    /// A simple value, either a resource location or an id of another tag.
+    Simple(String),
+    /// An advanced value, with an id (same as above) and whether the loading of the tag should fail when entry is not found.
+    Advanced {
+        /// The id of the tag.
+        id: String,
+        /// Whether the loading of the tag should fail when the entry is not found.
+        required: bool,
+    },
+}
+impl From<&str> for TagValue {
+    fn from(value: &str) -> Self {
+        Self::Simple(value.to_string())
+    }
+}
+impl TagValue {
+    /// Compile the tag value into a JSON value.
+    pub fn compile(&self) -> serde_json::Value {
+        match self {
+            Self::Simple(value) => serde_json::Value::String(value.clone()),
+            Self::Advanced { id, required } => {
+                let mut map = serde_json::Map::new();
+                map.insert("id".to_string(), serde_json::Value::String(id.clone()));
+                map.insert("required".to_string(), serde_json::Value::Bool(*required));
+                serde_json::Value::Object(map)
+            }
+        }
+    }
+}
diff --git a/src/lib.rs b/src/lib.rs
index d5ae419..cacfa40 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -10,4 +10,6 @@
 )]
 #![deny(unsafe_code)]
 
+pub mod datapack;
+pub mod util;
 pub mod virtual_fs;
diff --git a/src/util/compile.rs b/src/util/compile.rs
new file mode 100644
index 0000000..b1b38a5
--- /dev/null
+++ b/src/util/compile.rs
@@ -0,0 +1,30 @@
+//! Compile options for the compiler.
+
+use std::sync::Mutex;
+
+use serde::{Deserialize, Serialize};
+
+/// Compile options for the compiler.
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct CompileOptions {
+    /// Whether to compile in debug mode.
+    pub debug: bool,
+}
+
+impl Default for CompileOptions {
+    fn default() -> Self {
+        Self { debug: true }
+    }
+}
+
+/// State of the compiler that can change during compilation.
+#[derive(Debug, Clone, Serialize, Deserialize, Default)]
+pub struct CompilerState {}
+/// Mutex for the compiler state.
+pub type MutCompilerState = Mutex<CompilerState>;
+
+/// State of the compiler for each function that can change during compilation.
+#[derive(Debug, Clone, Serialize, Deserialize, Default)]
+pub struct FunctionCompilerState {}
+/// Mutex for the function compiler state.
+pub type MutFunctionCompilerState = Mutex<FunctionCompilerState>;
diff --git a/src/util/mod.rs b/src/util/mod.rs
new file mode 100644
index 0000000..063a674
--- /dev/null
+++ b/src/util/mod.rs
@@ -0,0 +1,3 @@
+//! Utility functions for the Shulkerbox project.
+
+pub mod compile;
diff --git a/src/virtual_fs.rs b/src/virtual_fs.rs
index f4d4f9a..ff4980b 100644
--- a/src/virtual_fs.rs
+++ b/src/virtual_fs.rs
@@ -7,11 +7,11 @@ use std::{
     path::Path,
 };
 
+use serde::{Deserialize, Serialize};
 use zip::ZipWriter;
 
 /// Folder representation in virtual file system
-#[derive(Debug, Default, Clone)]
-#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
+#[derive(Debug, Default, Clone, Serialize, Deserialize)]
 pub struct VFolder {
     folders: HashMap<String, VFolder>,
     files: HashMap<String, VFile>,
@@ -185,6 +185,20 @@ impl VFolder {
 
         files
     }
+
+    /// Recursively merge another folder into this folder.
+    pub fn merge(&mut self, other: Self) {
+        for (name, folder) in other.folders {
+            if let Some(existing_folder) = self.folders.get_mut(&name) {
+                existing_folder.merge(folder);
+            } else {
+                self.folders.insert(name, folder);
+            }
+        }
+        for (name, file) in other.files {
+            self.files.insert(name, file);
+        }
+    }
 }
 
 impl TryFrom<&Path> for VFolder {
@@ -223,8 +237,7 @@ impl TryFrom<&Path> for VFolder {
 }
 
 /// File representation in virtual file system
-#[derive(Debug, Clone)]
-#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
+#[derive(Debug, Clone, Serialize, Deserialize)]
 pub enum VFile {
     /// Text file
     Text(String),