diff --git a/Cargo.lock b/Cargo.lock
index c2f1fcc32d489e5e2eb760d6d667bfe4faa9d75f..801e0864f7d4280911b83fc09235c1b93e77305a 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -316,6 +316,7 @@ dependencies = [
  "pretty_assertions 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.78 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_derive 1.0.66 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.21 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
diff --git a/documents/Cargo.toml b/documents/Cargo.toml
index 3b9d92dee54fb6299338a5f4938162edb2c3c2e1..042065c0a3fa54f60e1dbe7dada6e6ea8e4aaa3e 100644
--- a/documents/Cargo.toml
+++ b/documents/Cargo.toml
@@ -20,6 +20,7 @@ pest = "2.0"
 pest_derive = "2.0"
 serde = "1.0.*"
 serde_derive = "1.0.*"
+serde_json = "1.0.*"
 
 [dev-dependencies]
 pretty_assertions = "0.5.1"
diff --git a/documents/src/lib.rs b/documents/src/lib.rs
index 0c5e831756a1dc76b8c3f1e1600896d6b5de6b56..586f5d41f7889685eae9de7f8846cfe15f5150e6 100644
--- a/documents/src/lib.rs
+++ b/documents/src/lib.rs
@@ -39,6 +39,7 @@ extern crate pretty_assertions;
 extern crate serde;
 #[macro_use]
 extern crate serde_derive;
+extern crate serde_json;
 
 pub mod blockstamp;
 mod currencies_codes;
@@ -50,6 +51,7 @@ use dup_crypto::hashs::Hash;
 use dup_crypto::keys::*;
 use pest::iterators::Pair;
 use pest::Parser;
+use serde::Serialize;
 use std::cmp::Ordering;
 use std::fmt::{Debug, Display, Error, Formatter};
 use std::io::Cursor;
@@ -315,3 +317,19 @@ pub trait DocumentParser<S, D, E> {
     /// Parse a source and return a document or an error.
     fn parse(source: S) -> Result<D, E>;
 }
+
+/// Jsonify a document
+pub trait ToJsonObject {
+    type JsonObject: Serialize;
+    /// Transforms an object into a json object
+    fn to_json_object(&self) -> Self::JsonObject;
+
+    /// Convert to JSON String
+    fn to_json_string(&self) -> Result<String, serde_json::Error> {
+        Ok(serde_json::to_string(&self.to_json_object())?)
+    }
+    /// Convert to JSON String pretty
+    fn to_json_string_pretty(&self) -> Result<String, serde_json::Error> {
+        Ok(serde_json::to_string_pretty(&self.to_json_object())?)
+    }
+}