diff --git a/src/pipeline.rs b/src/pipeline.rs
index 318f87c..19b785b 100644
--- a/src/pipeline.rs
+++ b/src/pipeline.rs
@@ -1,5 +1,5 @@
 use super::headers::Headers;
-use crate::pipeline_iterators::{AddCol, Flush, MapCol, MapRow, TransformInto};
+use crate::pipeline_iterators::{AddCol, Flush, MapCol, MapRow, TransformInto, Validate};
 use crate::target::Target;
 use crate::transform::Transform;
 use crate::{Error, Row, RowResult, StringTarget};
@@ -225,6 +225,18 @@ impl<'a> Pipeline<'a> {
 		}
 	}
 
+	pub fn validate<F>(mut self, get_row: F) -> Self
+	where
+		F: FnMut(&Headers, &Row) -> Result<(), Error> + 'a,
+	{
+		self.iterator = Box::new(Validate {
+			iterator: self.iterator,
+			f: get_row,
+			headers: self.headers.clone(),
+		});
+		self
+	}
+
 	/// Write to the specified [`Target`].
 	///
 	/// ## Example
diff --git a/src/pipeline_iterators.rs b/src/pipeline_iterators.rs
index 7a18057..3354aa2 100644
--- a/src/pipeline_iterators.rs
+++ b/src/pipeline_iterators.rs
@@ -152,6 +152,30 @@ where
 	}
 }
 
+pub struct Validate<I, F> {
+	pub iterator: I,
+	pub f: F,
+	pub headers: Headers,
+}
+impl<I, F> Iterator for Validate<I, F>
+where
+	I: Iterator<Item = RowResult>,
+	F: FnMut(&Headers, &Row) -> Result<(), Error>,
+{
+	type Item = RowResult;
+
+	fn next(&mut self) -> Option<Self::Item> {
+		let row = match self.iterator.next()? {
+			Ok(row) => row,
+			Err(e) => return Some(Err(e)),
+		};
+		match (self.f)(&self.headers, &row) {
+			Ok(()) => Some(Ok(row)),
+			Err(e) => Some(Err(e)),
+		}
+	}
+}
+
 pub struct Flush<I, T> {
 	pub iterator: I,
 	pub target: T,