diff --git a/src/labels/mod.rs b/src/labels/mod.rs
index 55b9445..146d27b 100644
--- a/src/labels/mod.rs
+++ b/src/labels/mod.rs
@@ -1,2 +1,3 @@
 pub mod parse;
+pub mod process;
 pub mod sanitize;
diff --git a/src/labels/parse.rs b/src/labels/parse.rs
index 65567ea..cdb8eca 100644
--- a/src/labels/parse.rs
+++ b/src/labels/parse.rs
@@ -8,8 +8,8 @@ use crate::{
     world::Stat,
 };
 
-type ParsedStat = Vec<Chunk>;
-enum Chunk {
+pub type ParsedStat = Vec<Chunk>;
+pub enum Chunk {
     Verbatim(String),
     Label(LabelName),
     Reference(LabelName),
@@ -22,7 +22,7 @@ pub struct LabelName {
     pub local: Option<CompactString>,
 }
 
-fn parse_stat_labels(stat: &Stat) -> ParsedStat {
+pub fn parse_stat_labels(stat: &Stat) -> ParsedStat {
     let code = &stat.code;
     let mut parser = ParseState::new(code);
     assert!(
diff --git a/src/labels/process.rs b/src/labels/process.rs
new file mode 100644
index 0000000..796a5ed
--- /dev/null
+++ b/src/labels/process.rs
@@ -0,0 +1,41 @@
+use crate::world::Board;
+
+use super::{
+    parse::{Chunk, ParsedStat, parse_stat_labels},
+    sanitize::Registry,
+};
+
+pub fn process_labels(board: &mut Board) {
+    // Parse stats into chunks
+    let mut stats: Vec<ParsedStat> = board
+        .stats
+        .iter()
+        .map(|stat| parse_stat_labels(&stat))
+        .collect();
+    let mut registry = Registry::new();
+
+    // Replace each label with its sanitized equivalent
+    for stat in stats.iter_mut() {
+        for chunk in stat.iter_mut() {
+            match chunk {
+                Chunk::Verbatim(_) => {}
+                Chunk::Label(name) | Chunk::Reference(name) => {
+                    let sanitized = registry.sanitize(name);
+                    *chunk = Chunk::Verbatim(sanitized.into());
+                }
+            }
+        }
+    }
+
+    // Join chunks together and replace old stats' code
+    for (old_stat, parsed_stat) in board.stats.iter_mut().zip(stats.into_iter()) {
+        let new_code = parsed_stat
+            .into_iter()
+            .map(|chunk| match chunk {
+                Chunk::Verbatim(s) => s,
+                _ => unreachable!(),
+            })
+            .collect();
+        old_stat.code = new_code;
+    }
+}
diff --git a/src/main.rs b/src/main.rs
index 32dd62e..eb81f8e 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -5,7 +5,7 @@ mod preprocess;
 mod world;
 
 use anyhow::anyhow;
-use labels::parse::print_labels;
+use labels::{parse::print_labels, process::process_labels};
 use preprocess::eval::Context;
 use std::{env, error::Error, fs, path::PathBuf, process::exit};
 use world::World;
@@ -55,6 +55,10 @@ fn main() -> Result<(), Box<dyn Error>> {
         }
     }
 
+    for mut board in &mut world.boards {
+        process_labels(&mut board);
+    }
+
     // Try to write a modified world file
     fs::write("tmp.zzt", world.to_bytes()?)?;