diff --git a/src/bake/DevServer/SourceMapStore.zig b/src/bake/DevServer/SourceMapStore.zig
index cfcfd00d8a..561d9d4897 100644
--- a/src/bake/DevServer/SourceMapStore.zig
+++ b/src/bake/DevServer/SourceMapStore.zig
@@ -210,8 +210,30 @@ pub const Entry = struct {
             return bun.strings.percentEncodeWrite(utf8_input, writer);
         }
 
-        // On the server, we don't need to do anything
-        try writer.appendSlice(utf8_input);
+        // On the server, escape special characters for JSON
+        var remaining = utf8_input;
+        while (remaining.len > 0) {
+            if (std.mem.indexOfAny(u8, remaining, "\"\\\n\r\t")) |index| {
+                // Write everything before the special character
+                if (index > 0) {
+                    try writer.appendSlice(remaining[0..index]);
+                }
+                // Write the escaped character
+                switch (remaining[index]) {
+                    '"' => try writer.appendSlice("\\\""),
+                    '\\' => try writer.appendSlice("\\\\"),
+                    '\n' => try writer.appendSlice("\\n"),
+                    '\r' => try writer.appendSlice("\\r"),
+                    '\t' => try writer.appendSlice("\\t"),
+                    else => unreachable,
+                }
+                remaining = remaining[index + 1 ..];
+            } else {
+                // No special characters found, write the rest
+                try writer.appendSlice(remaining);
+                break;
+            }
+        }
     }
 
     fn joinVLQ(map: *const Entry, kind: ChunkKind, j: *StringJoiner, arena: Allocator, side: bake.Side) !void {