diff --git a/body.go b/body.go
index 1a1c172..75bf0fe 100644
--- a/body.go
+++ b/body.go
@@ -43,10 +43,9 @@ func BodyBytes(b []byte) BodyGetter {
 	}
 }
 
-// BodyJSON is a BodyGetter that marshals a JSON object.
-func BodyJSON(v any) BodyGetter {
+func BodySerializer(s Serializer, v any) BodyGetter {
 	return func() (io.ReadCloser, error) {
-		b, err := jsonMarshal(v)
+		b, err := s(v)
 		if err != nil {
 			return nil, err
 		}
@@ -54,6 +53,11 @@ func BodyJSON(v any) BodyGetter {
 	}
 }
 
+// BodyJSON is a BodyGetter that marshals a JSON object.
+func BodyJSON(v any) BodyGetter {
+	return BodySerializer(JSONSerializer, v)
+}
+
 // BodyForm is a BodyGetter that builds an encoded form body.
 func BodyForm(data url.Values) BodyGetter {
 	return func() (r io.ReadCloser, err error) {
diff --git a/builder_extras.go b/builder_extras.go
index 4ed7fbc..1448c1f 100644
--- a/builder_extras.go
+++ b/builder_extras.go
@@ -133,6 +133,11 @@ func (rb *Builder) BodyBytes(b []byte) *Builder {
 	return rb.Body(BodyBytes(b))
 }
 
+func (rb *Builder) BodySerializer(s Serializer, v any) *Builder {
+	return rb.
+		Body(BodySerializer(s, v))
+}
+
 // BodyJSON sets the Builder's request body to the marshaled JSON.
 // It also sets ContentType to "application/json".
 func (rb *Builder) BodyJSON(v any) *Builder {
@@ -169,6 +174,11 @@ func (rb *Builder) CheckPeek(n int, f func([]byte) error) *Builder {
 	return rb.AddValidator(CheckPeek(n, f))
 }
 
+func (rb *Builder) ToDeserializer(d Deserializer, v any) *Builder {
+	return rb.
+		Handle(ToDeserializer(d, v))
+}
+
 // ToJSON sets the Builder to decode a response as a JSON object
 func (rb *Builder) ToJSON(v any) *Builder {
 	return rb.Handle(ToJSON(v))
diff --git a/handler.go b/handler.go
index 590c8cf..78e0a75 100644
--- a/handler.go
+++ b/handler.go
@@ -38,20 +38,24 @@ func consumeBody(res *http.Response) (err error) {
 	return err
 }
 
-// ToJSON decodes a response as a JSON object.
-func ToJSON(v any) ResponseHandler {
+func ToDeserializer(d Deserializer, v any) ResponseHandler {
 	return func(res *http.Response) error {
 		data, err := io.ReadAll(res.Body)
 		if err != nil {
 			return err
 		}
-		if err = jsonUnmarshal(data, v); err != nil {
+		if err = d(data, v); err != nil {
 			return err
 		}
 		return nil
 	}
 }
 
+// ToJSON decodes a response as a JSON object.
+func ToJSON(v any) ResponseHandler {
+	return ToDeserializer(JSONDeserializer, v)
+}
+
 // ToString writes the response body to the provided string pointer.
 func ToString(sp *string) ResponseHandler {
 	return func(res *http.Response) error {
diff --git a/json.go b/json.go
index 62a9331..bb93081 100644
--- a/json.go
+++ b/json.go
@@ -4,25 +4,10 @@ import (
 	"encoding/json"
 )
 
-type jsonMarshaller = func(v any) ([]byte, error)
-type jsonUnmarshaller = func(data []byte, v any) error
+type Serializer = func(v any) ([]byte, error)
+type Deserializer = func(data []byte, v any) error
 
 var (
-	jsonMarshal   = json.Marshal
-	jsonUnmarshal = json.Unmarshal
+	JSONSerializer   = json.Marshal
+	JSONDeserializer = json.Unmarshal
 )
-
-func SetJSONUnmarshaller(j jsonUnmarshaller) {
-	jsonUnmarshal = j
-}
-
-func SetJSONMarshaller(j jsonMarshaller) {
-	jsonMarshal = j
-}
-
-// SetJSONSerializers is a function to set global json.Marshal/json.Unmarshal function
-// For faster serialization/deserialization you can use functions from, for instance, https://github.com/goccy/go-json
-func SetJSONSerializers(marshaller jsonMarshaller, unmarshaller jsonUnmarshaller) {
-	jsonMarshal = marshaller
-	jsonUnmarshal = unmarshaller
-}
diff --git a/reqxml/body.go b/reqxml/body.go
index 6c220df..cc15619 100644
--- a/reqxml/body.go
+++ b/reqxml/body.go
@@ -2,20 +2,13 @@ package reqxml
 
 import (
 	"encoding/xml"
-	"io"
 
 	"github.com/carlmjohnson/requests"
 )
 
 // Body is a BodyGetter that marshals a XML object.
 func Body(v any) requests.BodyGetter {
-	return func() (io.ReadCloser, error) {
-		b, err := xml.Marshal(v)
-		if err != nil {
-			return nil, err
-		}
-		return requests.BodyBytes(b)()
-	}
+	return requests.BodySerializer(xml.Marshal, v)
 }
 
 // BodyConfig sets the Builder's request body to the marshaled XML.
diff --git a/reqxml/to.go b/reqxml/to.go
index 6907cd4..c7b61a5 100644
--- a/reqxml/to.go
+++ b/reqxml/to.go
@@ -2,22 +2,11 @@ package reqxml
 
 import (
 	"encoding/xml"
-	"io"
-	"net/http"
 
 	"github.com/carlmjohnson/requests"
 )
 
 // To decodes a response as an XML object.
 func To(v any) requests.ResponseHandler {
-	return func(res *http.Response) error {
-		data, err := io.ReadAll(res.Body)
-		if err != nil {
-			return err
-		}
-		if err = xml.Unmarshal(data, v); err != nil {
-			return err
-		}
-		return nil
-	}
+	return requests.ToDeserializer(xml.Unmarshal, v)
 }