diff --git a/backend/src/thumbnailer.rs b/backend/src/thumbnailer.rs
index 42b78f9..015c751 100644
--- a/backend/src/thumbnailer.rs
+++ b/backend/src/thumbnailer.rs
@@ -1,9 +1,8 @@
 use std::collections::HashSet;
 use std::fs;
 use std::path::Path;
-use std::process::Command;
-use anyhow::{bail, Result};
-use shlex::Shlex;
+use anyhow::{Result};
+use crate::utils::run_cmd;
 
 #[derive(Debug)]
 pub struct Thumbnailer {
@@ -45,19 +44,11 @@ impl Thumbnailer {
 
     /// Generate thumbnail
     pub fn gen(&self, orig: &str, new: &str, pixels: i32) -> Result<()> {
-        let cmd = self.exec
+        run_cmd(&*self.exec
             .replace("%s", &*format!("'{pixels}'"))
             .replace("%u", &shlex::quote(orig))
             .replace("%i", &shlex::quote(orig))
-            .replace("%o", &shlex::quote(new));
-        let args: Vec<String> = Shlex::new(&*cmd).collect();
-        let out = Command::new(args[0].to_owned()).args(&args[1..]).output()?;
-        if !out.status.success() {
-            error!("Command failed: {cmd}");
-            error!("Command output: {:?}", out);
-            bail!(String::from_utf8(out.stderr)?);
-        }
-        debug!("Command output: {:?}", out);
+            .replace("%o", &shlex::quote(new)))?;
 
         Ok(())
     }
diff --git a/backend/src/utils.rs b/backend/src/utils.rs
index 9bfedbd..9100d38 100644
--- a/backend/src/utils.rs
+++ b/backend/src/utils.rs
@@ -1,5 +1,8 @@
 use std::{fs, io};
 use std::path::{PathBuf};
+use std::process::{Command, Output};
+use anyhow::{Result, bail};
+use shlex::Shlex;
 
 pub fn write_sf<C: AsRef<[u8]>>(path: &PathBuf, contents: C) -> io::Result<()> {
     // Create parent if it has parent
@@ -9,3 +12,15 @@ pub fn write_sf<C: AsRef<[u8]>>(path: &PathBuf, contents: C) -> io::Result<()> {
 
     fs::write(path, contents)
 }
+
+pub fn run_cmd(cmd: &str) -> Result<Output> {
+    let args: Vec<String> = Shlex::new(&*cmd).collect();
+    let out = Command::new(args[0].to_owned()).args(&args[1..]).output()?;
+    if !out.status.success() {
+        error!("Command failed: {cmd}");
+        error!("Command output: {:?}", out);
+        bail!(String::from_utf8(out.stderr)?);
+    }
+    debug!("Command output: {:?}", out);
+    Ok(out)
+}