diff --git a/Cargo.lock b/Cargo.lock
index df97042..96527c4 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -155,6 +155,12 @@ version = "3.14.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7f30e7476521f6f8af1a1c4c0b8cc94f0bee37d91763d0ca2665f299b6cd8aec"
 
+[[package]]
+name = "byteorder"
+version = "1.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1fd0f2584146f6f2ef48085050886acf353beff7305ebd1ae69500e27c67f64b"
+
 [[package]]
 name = "bytes"
 version = "1.5.0"
@@ -170,6 +176,17 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "cfb"
+version = "0.7.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d38f2da7a0a2c4ccf0065be06397cc26a81f4e528be095826eee9d4adbb8c60f"
+dependencies = [
+ "byteorder",
+ "fnv",
+ "uuid",
+]
+
 [[package]]
 name = "cfg-if"
 version = "1.0.0"
@@ -286,6 +303,12 @@ dependencies = [
  "once_cell",
 ]
 
+[[package]]
+name = "fnv"
+version = "1.0.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3f9eec918d3f24069decb9af1554cad7c880e2da24a9afd88aca000531ab82c1"
+
 [[package]]
 name = "form_urlencoded"
 version = "1.2.1"
@@ -441,6 +464,15 @@ version = "0.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ce23b50ad8242c51a442f3ff322d56b02f08852c77e4c0b4d3fd684abc89c683"
 
+[[package]]
+name = "infer"
+version = "0.15.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cb33622da908807a06f9513c19b3c1ad50fab3e4137d82a78107d502075aa199"
+dependencies = [
+ "cfb",
+]
+
 [[package]]
 name = "inventory"
 version = "0.3.14"
@@ -633,6 +665,7 @@ dependencies = [
  "clap",
  "color-eyre",
  "futures",
+ "infer",
  "libc",
  "regex",
  "serde",
@@ -974,6 +1007,12 @@ version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "711b9620af191e0cdc7468a8d14e709c3dcdb115b36f838e601583af800a370a"
 
+[[package]]
+name = "uuid"
+version = "1.6.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5e395fcf16a7a3d8127ec99782007af141946b4795001f876d54fb0d55978560"
+
 [[package]]
 name = "valuable"
 version = "0.1.0"
diff --git a/Cargo.toml b/Cargo.toml
index 622db2b..6b9b9c4 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -11,6 +11,7 @@ async-trait = "0.1.77"
 clap = { version = "4.4.16", features = ["derive"] }
 color-eyre = "0.6.2"
 futures = "0.3.30"
+infer = { version = "0.15.0", default-features = false, features = ["alloc", "cfb"] }
 libc = "0.2.152"
 regex = "1.10.2"
 serde = { version = "1.0.195", features = ["derive"] }
diff --git a/src/filters.rs b/src/filters.rs
index c565fcb..bdf8ef2 100644
--- a/src/filters.rs
+++ b/src/filters.rs
@@ -3,8 +3,8 @@ use std::path::Path;
 use async_trait::async_trait;
 use serde::Deserialize;
 
-use tokio::io::{self, AsyncReadExt};
 use tokio::fs;
+use tokio::io::{self, AsyncReadExt, AsyncSeekExt};
 
 use futures::prelude::*;
 
@@ -156,28 +156,49 @@ filter! {
 #[serde(rename_all = "snake_case")]
 pub enum Magic {
     Mime(String),
-    Bytes(Box<[u8]>),
+    Magic {
+        bytes: Box<[u8]>,
+        #[serde(default)]
+        offset: u64,
+    },
 }
 
-async fn read_first_bytes(n: usize, path: &Path) -> io::Result<Box<[u8]>> {
+async fn read_first_bytes(n: usize, path: &Path, offset: u64) -> io::Result<Box<[u8]>> {
+    use std::io::SeekFrom;
+
     let mut file = fs::File::open(path).await?;
 
     let mut buf = vec![0; n];
 
+    file.seek(SeekFrom::Start(offset)).await?;
     file.read_exact(&mut buf).await?;
 
     Ok(buf.into())
 }
 
+async fn guess_mime(path: &Path) -> Option<infer::Type> {
+    let mut file = fs::File::open(path).await.ok()?;
+
+    let mut buf = vec![0; 8192];
+
+    let len = file.read(&mut buf).await.ok()?;
+
+    infer::get(&buf[0..len])
+}
+
 #[typetag::deserialize(name = "content_type")]
 #[async_trait]
 impl Filter for Magic {
     async fn matches(&self, file: &Path) -> bool {
         match *self {
-            Magic::Bytes(ref bytes) => {
-                read_first_bytes(bytes.len(), file).await.map(|read| read == *bytes).unwrap_or(false)
-            },
-            Magic::Mime(_) => unimplemented!()
+            Magic::Magic { ref bytes, offset } => read_first_bytes(bytes.len(), file, offset)
+                .await
+                .map(|read| read == *bytes)
+                .unwrap_or(false),
+            Magic::Mime(ref mime_type) => guess_mime(file)
+                .await
+                .map(|typ| typ.mime_type() == mime_type)
+                .unwrap_or(false),
         }
     }
 }