diff --git a/Cargo.lock b/Cargo.lock
index 4f0f9a6..e4629ac 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -110,6 +110,15 @@ dependencies = [
  "wyz",
 ]
 
+[[package]]
+name = "block-buffer"
+version = "0.10.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3078c7629b62d3f0439517fa394996acacc5cbc91c5a20d8c658e77abd503a71"
+dependencies = [
+ "generic-array",
+]
+
 [[package]]
 name = "borsh"
 version = "1.6.1"
@@ -240,6 +249,7 @@ dependencies = [
  "ipnetwork",
  "jiff",
  "js_option",
+ "libcorn",
  "ron",
  "rust_decimal",
  "secrecy",
@@ -281,6 +291,25 @@ version = "0.8.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "773648b94d0e5d620f64f280777445740e61fe701025087ec8b57f45c791888b"
 
+[[package]]
+name = "cpufeatures"
+version = "0.2.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "59ed5838eebb26a2bb2e58f6d5b5316989ae9d08bab10e0e6d103e656d1b0280"
+dependencies = [
+ "libc",
+]
+
+[[package]]
+name = "crypto-common"
+version = "0.1.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "78c8292055d1c1df0cce5d180393dc8cce0abec0a7102adb6c7b1eef6016d60a"
+dependencies = [
+ "generic-array",
+ "typenum",
+]
+
 [[package]]
 name = "darling"
 version = "0.21.3"
@@ -360,6 +389,16 @@ dependencies = [
  "serde_core",
 ]
 
+[[package]]
+name = "digest"
+version = "0.10.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9ed9a281f7bc9b7576e61468ba615a66a5c8cfdff42420a70aa82701a3b1e292"
+dependencies = [
+ "block-buffer",
+ "crypto-common",
+]
+
 [[package]]
 name = "displaydoc"
 version = "0.2.5"
@@ -448,6 +487,16 @@ version = "2.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e6d5a32815ae3f33302d95fdcb2ce17862f8c65363dcfd29360480ba1001fc9c"
 
+[[package]]
+name = "generic-array"
+version = "0.14.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "85649ca51fd72272d7821adaf274ad91c288277713d9c18820d8499a7ff69e9a"
+dependencies = [
+ "typenum",
+ "version_check",
+]
+
 [[package]]
 name = "getrandom"
 version = "0.2.17"
@@ -799,6 +848,19 @@ version = "0.2.183"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b5b646652bf6661599e1da8901b3b9522896f01e736bad5f723fe7a3a27f899d"
 
+[[package]]
+name = "libcorn"
+version = "0.10.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4cbe123d43f1351417f3b13e643bfce6c32590ca218226f1dc0c0dc9de2fbcdc"
+dependencies = [
+ "indexmap 2.13.0",
+ "pest",
+ "pest_derive",
+ "serde",
+ "thiserror 2.0.18",
+]
+
 [[package]]
 name = "libm"
 version = "0.2.16"
@@ -913,6 +975,49 @@ version = "2.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9b4f627cb1b25917193a259e49bdad08f671f8d9708acfd5fe0a8c1455d87220"
 
+[[package]]
+name = "pest"
+version = "2.8.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e0848c601009d37dfa3430c4666e147e49cdcf1b92ecd3e63657d8a5f19da662"
+dependencies = [
+ "memchr",
+ "ucd-trie",
+]
+
+[[package]]
+name = "pest_derive"
+version = "2.8.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "11f486f1ea21e6c10ed15d5a7c77165d0ee443402f0780849d1768e7d9d6fe77"
+dependencies = [
+ "pest",
+ "pest_generator",
+]
+
+[[package]]
+name = "pest_generator"
+version = "2.8.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8040c4647b13b210a963c1ed407c1ff4fdfa01c31d6d2a098218702e6664f94f"
+dependencies = [
+ "pest",
+ "pest_meta",
+ "proc-macro2",
+ "quote",
+ "syn 2.0.117",
+]
+
+[[package]]
+name = "pest_meta"
+version = "2.8.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "89815c69d36021a140146f26659a81d6c2afa33d216d736dd4be5381a7362220"
+dependencies = [
+ "pest",
+ "sha2",
+]
+
 [[package]]
 name = "pin-project-lite"
 version = "0.2.17"
@@ -1336,6 +1441,17 @@ dependencies = [
  "syn 2.0.117",
 ]
 
+[[package]]
+name = "sha2"
+version = "0.10.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a7507d819769d01a365ab707794a4084392c824f54a7a6a7862f8c3d0892b283"
+dependencies = [
+ "cfg-if",
+ "cpufeatures",
+ "digest",
+]
+
 [[package]]
 name = "shlex"
 version = "1.3.0"
@@ -1662,6 +1778,18 @@ version = "1.0.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bc7d623258602320d5c55d1bc22793b57daff0ec7efc270ea7d55ce1d5f5471c"
 
+[[package]]
+name = "typenum"
+version = "1.19.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "562d481066bde0658276a35467c4af00bdc6ee726305698a55b86e61d7ad82bb"
+
+[[package]]
+name = "ucd-trie"
+version = "0.1.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2896d95c02a80c6d6a5d6e953d479f5ddf2dfdb6a244441010e373ac0fb88971"
+
 [[package]]
 name = "unicode-ident"
 version = "1.0.24"
diff --git a/confik/CHANGELOG.md b/confik/CHANGELOG.md
index 40e760d..57d9b03 100644
--- a/confik/CHANGELOG.md
+++ b/confik/CHANGELOG.md
@@ -2,6 +2,8 @@
 
 ## Unreleased
 
+- Add Corn source support behind new crate feature `corn-0_10` (off-by-default).
+
 ## 0.15.11
 
 - Add a new helper `MergingUnsetBuilder` and trait `MergingWithUnset`, for aiding in building of custom `Configuration` implementations. See the docs on `MergingWithUnset` for a worked example.
diff --git a/confik/Cargo.toml b/confik/Cargo.toml
index a70eacb..3c037c1 100644
--- a/confik/Cargo.toml
+++ b/confik/Cargo.toml
@@ -26,6 +26,7 @@ default = ["env", "toml"]
 # Source types
 env = ["dep:envious"]
 json = ["dep:serde_json"]
+corn-0_10 = ["dep:libcorn-0_10"]
 ron-0_12 = ["dep:ron-0_12"]
 toml = ["dep:toml"]
 yaml_serde-0_10 = ["dep:yaml_serde-0_10"]
@@ -62,6 +63,7 @@ thiserror = "2"
 
 # Source types
 envious = { version = "0.2", optional = true }
+libcorn-0_10 = { package = "libcorn", version = "0.10", optional = true }
 ron-0_12 = { package = "ron", version = "0.12", optional = true }
 serde_json = { version = "1", optional = true }
 toml = { version = "1", optional = true, default-features = false, features = ["parse", "serde"] }
diff --git a/confik/src/lib.md b/confik/src/lib.md
index 0291430..6ec0d83 100644
--- a/confik/src/lib.md
+++ b/confik/src/lib.md
@@ -131,9 +131,10 @@ When the `tracing` feature is enabled, reload errors in the signal handler are a
 A [`Source`] is anything that can produce a partial [`ConfigurationBuilder`]. `confik` ships with the following source types:
 
 - [`EnvSource`]: Loads configuration from environment variables using the [`envious`] crate. Requires the `env` feature. (Enabled by default.)
-- [`FileSource`]: Loads configuration from a file, detecting `.toml`, `.json`, `.ron`, `.yaml`, or `.yml` files based on the file extension. Requires the matching `toml`, `json`, `ron-0_12`, or `yaml_serde-0_10` feature. (`toml` is enabled by default.)
+- [`FileSource`]: Loads configuration from a file, detecting `.toml`, `.json`, `.corn`, `.ron`, `.yaml`, or `.yml` files based on the file extension. Requires the matching `toml`, `json`, `corn-0_10`, `ron-0_12`, or `yaml_serde-0_10` feature. (`toml` is enabled by default.)
 - [`TomlSource`]: Loads configuration from a TOML string literal. Requires the `toml` feature. (Enabled by default.)
 - [`JsonSource`]: Loads configuration from a JSON string literal. Requires the `json` feature.
+- [`CornSource`]: Loads configuration from a Corn string literal. Requires the `corn-0_10` feature.
 - [`RonSource`]: Loads configuration from a RON string literal. Requires the `ron-0_12` feature.
 - [`YamlSource`]: Loads configuration from a YAML string literal. Requires the `yaml_serde-0_10` feature.
 - [`OffsetSource`]: Loads configuration from an inner source that is provided to it, but applied to a particular offset of the root configuration builder.
diff --git a/confik/src/lib.rs b/confik/src/lib.rs
index f2ef195..8c9811f 100644
--- a/confik/src/lib.rs
+++ b/confik/src/lib.rs
@@ -40,6 +40,8 @@ mod third_party;
 use self::path::Path;
 #[cfg(feature = "reloading")]
 pub use self::reloading::{ReloadCallback, ReloadableConfig, ReloadingConfig};
+#[cfg(feature = "corn-0_10")]
+pub use self::sources::corn_source::CornSource;
 #[cfg(feature = "env")]
 pub use self::sources::env_source::EnvSource;
 #[cfg(feature = "json")]
diff --git a/confik/src/sources/corn_source.rs b/confik/src/sources/corn_source.rs
new file mode 100644
index 0000000..309a1e5
--- /dev/null
+++ b/confik/src/sources/corn_source.rs
@@ -0,0 +1,95 @@
+use std::{borrow::Cow, error::Error, fmt};
+
+use crate::{ConfigurationBuilder, Source};
+
+/// A [`Source`] containing raw Corn data.
+#[derive(Clone)]
+pub struct CornSource<'a> {
+    contents: Cow<'a, str>,
+    allow_secrets: bool,
+}
+
+impl<'a> CornSource<'a> {
+    /// Creates a [`Source`] containing raw Corn data.
+    pub fn new(contents: impl Into<Cow<'a, str>>) -> Self {
+        Self {
+            contents: contents.into(),
+            allow_secrets: false,
+        }
+    }
+
+    /// Allows this source to contain secrets.
+    pub fn allow_secrets(mut self) -> Self {
+        self.allow_secrets = true;
+        self
+    }
+}
+
+impl<T: ConfigurationBuilder> Source<T> for CornSource<'_> {
+    fn allows_secrets(&self) -> bool {
+        self.allow_secrets
+    }
+
+    fn provide(&self) -> Result<T, Box<dyn Error + Sync + Send>> {
+        Ok(libcorn_0_10::from_str(&self.contents)?)
+    }
+}
+
+impl fmt::Debug for CornSource<'_> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        f.debug_struct("CornSource")
+            .field("allow_secrets", &self.allow_secrets)
+            .finish_non_exhaustive()
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use confik_macros::Configuration;
+
+    use super::*;
+
+    #[derive(Debug, PartialEq, Eq, serde::Deserialize, Configuration)]
+    struct TestConfig {
+        value: usize,
+    }
+
+    #[test]
+    fn provides_corn_data() {
+        let source = CornSource::new("{ value = 42 }");
+
+        let config =
+            <CornSource<'_> as Source<<TestConfig as crate::Configuration>::Builder>>::provide(
+                &source,
+            )
+            .unwrap()
+            .try_build()
+            .unwrap();
+
+        assert_eq!(config, TestConfig { value: 42 });
+    }
+
+    #[test]
+    fn propagates_parse_errors() {
+        let source = CornSource::new("{ value = ");
+
+        let err =
+            match <CornSource<'_> as Source<<TestConfig as crate::Configuration>::Builder>>::provide(
+                &source,
+            ) {
+                Ok(_) => panic!("Corn parsing should fail"),
+                Err(err) => err,
+            };
+
+        assert!(!err.to_string().is_empty());
+    }
+
+    #[test]
+    fn allow_secrets_enables_secret_loading() {
+        let source = CornSource::new("{ value = 42 }").allow_secrets();
+
+        assert!(<CornSource<'_> as Source<
+            <TestConfig as crate::Configuration>::Builder,
+        >>::allows_secrets(&source));
+    }
+}
diff --git a/confik/src/sources/file_source.rs b/confik/src/sources/file_source.rs
index 2354be4..bee43cb 100644
--- a/confik/src/sources/file_source.rs
+++ b/confik/src/sources/file_source.rs
@@ -35,6 +35,10 @@ enum FileErrorKind {
     #[error(transparent)]
     Json(#[from] serde_json::Error),
 
+    #[cfg(feature = "corn-0_10")]
+    #[error(transparent)]
+    Corn(#[from] libcorn_0_10::error::Error),
+
     #[cfg(feature = "ron-0_12")]
     #[error(transparent)]
     Ron(#[from] ron_0_12::error::SpannedError),
@@ -60,6 +64,7 @@ impl FileSource {
     /// - `toml`
     /// - `json`
     /// - `ron`
+    /// - `corn`
     /// - `yaml`
     /// - `yml`
     pub fn new(path: impl Into<PathBuf>) -> Self {
@@ -100,6 +105,16 @@ impl FileSource {
                 }
             }
 
+            Some("corn") => {
+                cfg_if! {
+                    if #[cfg(feature = "corn-0_10")] {
+                        Ok(libcorn_0_10::from_str(&contents)?)
+                    } else {
+                        Err(FileErrorKind::MissingFeatureForExtension("corn"))
+                    }
+                }
+            }
+
             Some("ron") => {
                 cfg_if! {
                     if #[cfg(feature = "ron-0_12")] {
@@ -253,6 +268,29 @@ mod tests {
         dir.close().unwrap();
     }
 
+    #[cfg(feature = "corn-0_10")]
+    #[test]
+    fn corn() {
+        let dir = tempfile::TempDir::new().unwrap();
+
+        let corn_path = dir.path().join("config.corn");
+
+        fs::write(&corn_path, "{ bar = 42 }").unwrap();
+        let source = FileSource::new(&corn_path);
+        let err = source.deserialize::<Option<SimpleConfig>>().unwrap_err();
+        assert!(
+            err.to_string().contains("missing field"),
+            "unexpected error message: {err}",
+        );
+
+        fs::write(&corn_path, "{ foo = 42 }").unwrap();
+        let source = FileSource::new(&corn_path);
+        let config = source.deserialize::<Option<SimpleConfig>>().unwrap();
+        assert_eq!(config.unwrap().foo, 42);
+
+        dir.close().unwrap();
+    }
+
     #[cfg(feature = "yaml_serde-0_10")]
     #[test]
     fn yaml() {
diff --git a/confik/src/sources/mod.rs b/confik/src/sources/mod.rs
index ccc2509..66847e3 100644
--- a/confik/src/sources/mod.rs
+++ b/confik/src/sources/mod.rs
@@ -40,6 +40,9 @@ pub(crate) mod toml_source;
 #[cfg(feature = "json")]
 pub(crate) mod json_source;
 
+#[cfg(feature = "corn-0_10")]
+pub(crate) mod corn_source;
+
 #[cfg(feature = "ron-0_12")]
 pub(crate) mod ron_source;
 
diff --git a/confik/tests/main.rs b/confik/tests/main.rs
index 3522d50..8650ee3 100644
--- a/confik/tests/main.rs
+++ b/confik/tests/main.rs
@@ -58,6 +58,27 @@ mod json {
     }
 }
 
+#[cfg(feature = "corn-0_10")]
+mod corn {
+    use confik::{ConfigBuilder, CornSource};
+
+    use crate::{Target, TargetEnum};
+
+    #[test]
+    fn check_corn() {
+        assert_eq!(
+            ConfigBuilder::<Target>::default()
+                .override_with(CornSource::new(r#"{ a = 6 b = "Second" }"#))
+                .try_build()
+                .expect("Corn deserialization should succeed"),
+            Target {
+                a: 6,
+                b: TargetEnum::Second,
+            }
+        );
+    }
+}
+
 #[cfg(feature = "ron-0_12")]
 mod ron {
     use confik::{ConfigBuilder, RonSource};
diff --git a/confik/tests/secret/mod.rs b/confik/tests/secret/mod.rs
index 374581d..2c5ff6a 100644
--- a/confik/tests/secret/mod.rs
+++ b/confik/tests/secret/mod.rs
@@ -67,6 +67,27 @@ mod json {
     }
 }
 
+#[cfg(feature = "corn-0_10")]
+mod corn {
+    use assert_matches::assert_matches;
+    use confik::{ConfigBuilder, CornSource, Error};
+
+    use super::NotSecret;
+
+    #[test]
+    fn check_corn_is_not_secret() {
+        let target = ConfigBuilder::<NotSecret>::default()
+            .override_with(CornSource::new("{ public = { public = 1 secret = 2 } }"))
+            .try_build()
+            .expect_err("Corn deserialization is not a secret source");
+
+        assert_matches!(
+            &target,
+            Error::UnexpectedSecret(path, _) if path.to_string().contains("public.secret")
+        );
+    }
+}
+
 #[cfg(feature = "ron-0_12")]
 mod ron {
     use assert_matches::assert_matches;
diff --git a/justfile b/justfile
index 0a60f69..034d0f7 100644
--- a/justfile
+++ b/justfile
@@ -35,6 +35,10 @@ downgrade-for-msrv toolchain="":
     cargo {{ toolchain }} update -p=toml_writer@1.1.0+spec-1.1.0 --precise=1.0.7+spec-1.1.0 # next ver: 1.85
     cargo {{ toolchain }} update -p=toml_datetime@1.1.0+spec-1.1.0 --precise=1.0.1+spec-1.1.0 # next ver: 1.85
     cargo {{ toolchain }} update -p=yaml_serde --precise=0.10.2 # next ver: 1.82
+    cargo {{ toolchain }} update -p=pest_derive --precise=2.8.3 # next ver: 1.83
+    cargo {{ toolchain }} update -p=pest_generator --precise=2.8.3 # next ver: 1.83
+    cargo {{ toolchain }} update -p=pest_meta --precise=2.8.3 # next ver: 1.83
+    cargo {{ toolchain }} update -p=pest --precise=2.8.3 # next ver: 1.83
     cargo {{ toolchain }} update -p=indexmap@2 --precise=2.11.4 # next ver: 1.82
 
 # Test workspace using MSRV