diff --git a/.github/workflows/hf-xet-tests.yml b/.github/workflows/hf-xet-tests.yml
index 0b15d3ea..977b07c6 100644
--- a/.github/workflows/hf-xet-tests.yml
+++ b/.github/workflows/hf-xet-tests.yml
@@ -45,4 +45,9 @@ jobs:
       - name: Check Cargo.lock has no uncommitted changes
         run: |
           # the Build wheel step would update hf_xet/Cargo.lock if it is out of date
-          test -z "$(git status --porcelain hf_xet/Cargo.lock)" || (echo "hf_xet/Cargo.lock has uncommitted changes!" && exit 1)
\ No newline at end of file
+          if [ -n "$(git status --porcelain hf_xet/Cargo.lock)" ]; then
+            echo "::error::hf_xet/Cargo.lock has uncommitted changes!"
+            echo "Diff:"
+            git diff hf_xet/Cargo.lock
+            exit 1
+          fi
diff --git a/Cargo.lock b/Cargo.lock
index 3b6fc9aa..041ff488 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -939,6 +939,7 @@ dependencies = [
  "dirs",
  "error_printer",
  "hub_client",
+ "humansize",
  "jsonwebtoken",
  "lazy_static",
  "mdb_shard",
@@ -1730,6 +1731,15 @@ dependencies = [
  "urlencoding",
 ]
 
+[[package]]
+name = "humansize"
+version = "2.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6cb51c9a029ddc91b07a787f1d86b53ccfa49b0e86688c946ebe8d3555685dd7"
+dependencies = [
+ "libm",
+]
+
 [[package]]
 name = "humantime"
 version = "2.3.0"
@@ -2182,6 +2192,12 @@ dependencies = [
  "pkg-config",
 ]
 
+[[package]]
+name = "libm"
+version = "0.2.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f9fbbcab51052fe104eb5e5d351cf728d30a5be1fe14d9be8a3b097481fb97de"
+
 [[package]]
 name = "libredox"
 version = "0.1.3"
diff --git a/Cargo.toml b/Cargo.toml
index a6fef7f3..1ed9dfcb 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -57,6 +57,7 @@ getrandom = "0.3"
 git-url-parse = "0.4"
 git2 = "0.20"
 half = "2.4"
+humansize = "2.1"
 heapify = "0.2"
 heed = "0.11"
 http = "1"
diff --git a/data/Cargo.toml b/data/Cargo.toml
index f7d7b91d..50015d18 100644
--- a/data/Cargo.toml
+++ b/data/Cargo.toml
@@ -42,6 +42,7 @@ xet_runtime = { path = "../xet_runtime" }
 anyhow = { workspace = true }
 async-trait = { workspace = true }
 bytes = { workspace = true }
+humansize = { workspace = true }
 chrono = { workspace = true }
 clap = { workspace = true }
 jsonwebtoken = { workspace = true }
diff --git a/data/src/bin/xtool.rs b/data/src/bin/xtool.rs
index 801c9020..bf8b7f6f 100644
--- a/data/src/bin/xtool.rs
+++ b/data/src/bin/xtool.rs
@@ -12,6 +12,7 @@ use data::data_client::default_config;
 use data::migration_tool::hub_client_token_refresher::HubClientTokenRefresher;
 use data::migration_tool::migrate::migrate_files_impl;
 use hub_client::{BearerCredentialHelper, HubClient, Operation, RepoInfo};
+use humansize::{BINARY, DECIMAL, format_size};
 use merklehash::MerkleHash;
 use utils::auth::TokenRefresher;
 use walkdir::WalkDir;
@@ -76,6 +77,8 @@ enum Command {
     Dedup(DedupArg),
     /// Queries reconstruction information about a file.
     Query(QueryArg),
+    /// Calculates the compressed size of a xet-file by summing url_range sizes.
+    CompressedSize(CompressedSizeArg),
 }
 
 #[derive(Args)]
@@ -116,6 +119,12 @@ struct QueryArg {
     bytes_range: Option<FileRange>,
 }
 
+#[derive(Args)]
+struct CompressedSizeArg {
+    /// Xet-hash of a file.
+    hash: String,
+}
+
 impl Command {
     async fn run(self, hub_client: HubClient) -> Result<()> {
         match self {
@@ -161,6 +170,44 @@ impl Command {
 
                 Ok(())
             },
+            Command::CompressedSize(arg) => {
+                let file_hash = MerkleHash::from_hex(&arg.hash)?;
+                // Query reconstruction for full file (no Range header)
+                let ret = query_reconstruction(file_hash, None, hub_client).await?;
+
+                match ret {
+                    Some(response) => {
+                        let mut total_compressed_size = 0u64;
+
+                        for fetch_infos in response.fetch_info.values() {
+                            for fetch_info in fetch_infos {
+                                let range_size = fetch_info.url_range.end - fetch_info.url_range.start;
+                                total_compressed_size += range_size;
+                            }
+                        }
+
+                        let total_uncompressed_size: u64 =
+                            response.terms.iter().map(|term| term.unpacked_length as u64).sum();
+
+                        // Count unique XORBs
+                        let unique_xorbs: std::collections::HashSet<_> =
+                            response.terms.iter().map(|term| &term.hash).collect();
+
+                        println!("Compressed Size:   {}", format_bytes_with_units(total_compressed_size));
+                        println!("Uncompressed Size: {}", format_bytes_with_units(total_uncompressed_size));
+                        println!(
+                            "Compression Ratio:  {:.2}%",
+                            (total_compressed_size as f64 / total_uncompressed_size as f64) * 100.0
+                        );
+                        println!("XORBs:             {} unique", unique_xorbs.len());
+                        Ok(())
+                    },
+                    None => {
+                        eprintln!("No reconstruction information found for hash {}", arg.hash);
+                        Ok(())
+                    },
+                }
+            },
         }
     }
 }
@@ -193,6 +240,13 @@ fn is_git_special_files(path: &str) -> bool {
     matches!(path, ".git" | ".gitignore" | ".gitattributes")
 }
 
+/// Format bytes with binary and decimal units on one line
+fn format_bytes_with_units(bytes: u64) -> String {
+    let binary = format_size(bytes, BINARY);
+    let decimal = format_size(bytes, DECIMAL);
+    format!("{} bytes {} {}", bytes, binary, decimal)
+}
+
 async fn query_reconstruction(
     file_hash: MerkleHash,
     bytes_range: Option<FileRange>,
diff --git a/hf_xet/Cargo.lock b/hf_xet/Cargo.lock
index b89ced9a..a6125fd0 100644
--- a/hf_xet/Cargo.lock
+++ b/hf_xet/Cargo.lock
@@ -726,6 +726,7 @@ dependencies = [
  "deduplication",
  "error_printer",
  "hub_client",
+ "humansize",
  "jsonwebtoken",
  "lazy_static",
  "mdb_shard",
@@ -1375,6 +1376,15 @@ dependencies = [
  "urlencoding",
 ]
 
+[[package]]
+name = "humansize"
+version = "2.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6cb51c9a029ddc91b07a787f1d86b53ccfa49b0e86688c946ebe8d3555685dd7"
+dependencies = [
+ "libm",
+]
+
 [[package]]
 name = "humantime"
 version = "2.2.0"
@@ -1769,6 +1779,12 @@ version = "0.2.175"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6a82ae493e598baaea5209805c49bbf2ea7de956d50d7da0da1164f9c6d28543"
 
+[[package]]
+name = "libm"
+version = "0.2.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f9fbbcab51052fe104eb5e5d351cf728d30a5be1fe14d9be8a3b097481fb97de"
+
 [[package]]
 name = "libredox"
 version = "0.1.9"