diff --git a/crates/oxc_sourcemap/src/decode.rs b/crates/oxc_sourcemap/src/decode.rs
index 70fe0c442..8e2f668fb 100644
--- a/crates/oxc_sourcemap/src/decode.rs
+++ b/crates/oxc_sourcemap/src/decode.rs
@@ -3,9 +3,9 @@
 use crate::error::{Error, Result};
 use crate::{SourceMap, Token};
 
-#[derive(serde::Deserialize)]
+#[derive(serde::Deserialize, Default)]
 #[serde(rename_all = "camelCase")]
-struct JSONSourceMap {
+pub struct JSONSourceMap {
     // An optional name of the generated code that this source map is associated with.
     file: Option<String>,
     // A string with the encoded mapping data.
@@ -20,8 +20,7 @@ struct JSONSourceMap {
     names: Option<Vec<String>>,
 }
 
-pub fn decode(value: &str) -> Result<SourceMap> {
-    let json: JSONSourceMap = serde_json::from_str(value)?;
+pub fn decode(json: JSONSourceMap) -> Result<SourceMap> {
     let file = json.file.map(Into::into);
     let names =
         json.names.map(|v| v.into_iter().map(Into::into).collect::<Vec<_>>()).unwrap_or_default();
@@ -37,6 +36,10 @@ pub fn decode(value: &str) -> Result<SourceMap> {
     Ok(SourceMap::new(file, names, source_root, sources, source_contents, tokens, None))
 }
 
+pub fn decode_from_string(value: &str) -> Result<SourceMap> {
+    decode(serde_json::from_str(value)?)
+}
+
 #[allow(clippy::cast_possible_truncation)]
 fn decode_mapping(mapping: &str, names_len: usize, sources_len: usize) -> Result<Vec<Token>> {
     let mut tokens = vec![];
diff --git a/crates/oxc_sourcemap/src/lib.rs b/crates/oxc_sourcemap/src/lib.rs
index 837893944..0cb5e0a3d 100644
--- a/crates/oxc_sourcemap/src/lib.rs
+++ b/crates/oxc_sourcemap/src/lib.rs
@@ -9,6 +9,7 @@ mod sourcemap_visualizer;
 mod token;
 
 pub use concat_sourcemap_builder::ConcatSourceMapBuilder;
+pub use decode::JSONSourceMap;
 pub use error::Error;
 pub use sourcemap::SourceMap;
 pub use sourcemap_builder::SourceMapBuilder;
diff --git a/crates/oxc_sourcemap/src/sourcemap.rs b/crates/oxc_sourcemap/src/sourcemap.rs
index 652e39063..858853b6e 100644
--- a/crates/oxc_sourcemap/src/sourcemap.rs
+++ b/crates/oxc_sourcemap/src/sourcemap.rs
@@ -1,5 +1,5 @@
 use crate::{
-    decode::decode,
+    decode::{decode, decode_from_string, JSONSourceMap},
     encode::encode,
     error::Result,
     token::{Token, TokenChunk},
@@ -45,17 +45,25 @@ impl SourceMap {
         }
     }
 
-    /// Convert `SourceMap` to vlq sourcemap string.
+    /// Convert the vlq sourcemap to to `SourceMap`.
     /// # Errors
     ///
     /// The `serde_json` deserialize Error.
-    pub fn from_json_string(value: &str) -> Result<Self> {
+    pub fn from_json(value: JSONSourceMap) -> Result<Self> {
         decode(value)
     }
 
     /// Convert the vlq sourcemap string to `SourceMap`.
     /// # Errors
     ///
+    /// The `serde_json` deserialize Error.
+    pub fn from_json_string(value: &str) -> Result<Self> {
+        decode_from_string(value)
+    }
+
+    /// Convert `SourceMap` to vlq sourcemap string.
+    /// # Errors
+    ///
     /// The `serde_json` serialization Error.
     pub fn to_json_string(&self) -> Result<String> {
         encode(self)