diff --git a/Cargo.lock b/Cargo.lock
index 646133e..5a5c28e 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -81,7 +81,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "88903cb14723e4d4003335bb7f8a14f27691649105346a0f0957466c096adfe6"
 dependencies = [
  "anstyle",
- "bstr",
+ "bstr 1.6.0",
  "doc-comment",
  "predicates",
  "predicates-core",
@@ -107,6 +107,15 @@ version = "2.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b4682ae6287fcf752ecaabbfcc7b6f9b72aa33933dc23a554d853aea8eea8635"
 
+[[package]]
+name = "bstr"
+version = "0.2.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ba3569f383e8f1598449f1a423e72e99569137b47740b1da11ef19af3d5c3223"
+dependencies = [
+ "memchr",
+]
+
 [[package]]
 name = "bstr"
 version = "1.6.0"
@@ -290,7 +299,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "759c97c1e17c55525b57192c06a267cda0ac5210b222d6b82189a2338fa1c13d"
 dependencies = [
  "aho-corasick",
- "bstr",
+ "bstr 1.6.0",
  "fnv",
  "log",
  "regex",
@@ -594,6 +603,7 @@ dependencies = [
  "memmap2",
  "rayon",
  "regex",
+ "similar",
  "tempfile",
  "thiserror",
  "unescape",
@@ -605,6 +615,15 @@ version = "1.0.183"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "32ac8da02677876d532745a130fc9d8e6edfa81a269b107c5b00829b91d8eb3c"
 
+[[package]]
+name = "similar"
+version = "2.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2aeaf503862c419d66959f5d7ca015337d864e9c49485d771b732e2a20453597"
+dependencies = [
+ "bstr 0.2.17",
+]
+
 [[package]]
 name = "strsim"
 version = "0.10.0"
diff --git a/Cargo.toml b/Cargo.toml
index e22d8e0..9bc059a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -30,6 +30,7 @@ ignore = "0.4.20"
 ansi_term = "0.12.1"
 is-terminal = "0.4.9"
 clap = { version = "4.4.3", features = ["derive", "deprecated", "wrap_help"] }
+similar = { version = "2.3.0", features = ["inline", "bytes"] }
 
 [dev-dependencies]
 assert_cmd = "2.0.12"
diff --git a/src/replacer.rs b/src/replacer.rs
index f6d5d21..b947dd3 100644
--- a/src/replacer.rs
+++ b/src/replacer.rs
@@ -1,5 +1,6 @@
 use crate::{utils, Error, Result};
 use regex::bytes::Regex;
+use similar::{TextDiff, ChangeTag};
 use std::{fs, fs::File, io::prelude::*, path::Path};
 
 pub(crate) struct Replacer {
@@ -94,28 +95,61 @@ impl Replacer {
         &'a self,
         content: &[u8],
     ) -> std::borrow::Cow<'a, [u8]> {
+        use ansi_term::{Color, Style};
+
+        let replaced = self.replace(content);
+        let diff = TextDiff::from_lines(&*content, &*replaced);
+
         let mut v = Vec::<u8>::new();
-        let mut captures = self.regex.captures_iter(content);
-
-        self.regex.split(content).for_each(|sur_text| {
-            use regex::bytes::Replacer;
-
-            v.extend(sur_text);
-            if let Some(capture) = captures.next() {
-                v.extend_from_slice(
-                    ansi_term::Color::Green.prefix().to_string().as_bytes(),
-                );
-                if self.is_literal {
-                    regex::bytes::NoExpand(&self.replace_with)
-                        .replace_append(&capture, &mut v);
-                } else {
-                    (&*self.replace_with).replace_append(&capture, &mut v);
+
+        for group in diff.grouped_ops(3).iter() {
+            for op in group {
+                for change in diff.iter_inline_changes(op) {
+                    match change.tag() {
+                        ChangeTag::Delete => {
+                            v.extend(Color::Red.prefix().to_string().as_bytes());
+                            let idx = match change.old_index() {
+                                Some(old_idx) => format!("{:>3} ", old_idx).into_bytes(),
+                                None => b"    ".to_vec(),
+                            };
+                            v.extend(idx);
+                            v.push(b'-');
+                        },
+                        ChangeTag::Insert => {
+                            v.extend(Color::Green.prefix().to_string().as_bytes());
+                            let idx = match change.new_index() {
+                                Some(new_idx) => format!("{:>3} ", new_idx).into_bytes(),
+                                None => b"    ".to_vec(),
+                            };
+                            v.extend(idx);
+                            v.push(b'+');
+                        },
+                        ChangeTag::Equal => {
+                            v.extend(b"     ");
+                        },
+                    }
+                    v.push(b' ');
+
+                    for (emphasized, value) in change.iter_strings_lossy() {
+                        if emphasized {
+                            v.extend(Style::new().bold().paint(value).as_bytes());
+                        } else {
+                            v.extend(value.as_bytes());
+                        }
+                    }
+
+                    match change.tag() {
+                        ChangeTag::Delete => v.extend(Color::Red.suffix().to_string().as_bytes()),
+                        ChangeTag::Insert => v.extend(Color::Green.suffix().to_string().as_bytes()),
+                        ChangeTag::Equal => (),
+                    }
+
+                    if change.missing_newline() {
+                        v.push(b'\n');
+                    }
                 }
-                v.extend_from_slice(
-                    ansi_term::Color::Green.suffix().to_string().as_bytes(),
-                );
             }
-        });
+        }
 
         return std::borrow::Cow::Owned(v);
     }