diff --git a/include/cosms-core/file.h b/include/cosms-core/file.h
index cdd5adc..eef6e6b 100644
--- a/include/cosms-core/file.h
+++ b/include/cosms-core/file.h
@@ -47,6 +47,8 @@ struct cosms_core_file {
 CosmsCoreFileError cosms_core_file_open(struct cosms_core_file *file, const char *path, int mode);
 CosmsCoreFileError cosms_core_file_close(struct cosms_core_file *file);
 
+CosmsCoreFileError cosms_core_file_get_size(struct cosms_core_file *file, unsigned long long *size);
+
 CosmsCoreFileError cosms_core_file_read(const char *path, char **content, unsigned long long *size);
 CosmsCoreFileError cosms_core_file_write(const char *path, const char *content, unsigned long long size, int mode);
 
diff --git a/src/file.c b/src/file.c
index 381427a..2b871e2 100644
--- a/src/file.c
+++ b/src/file.c
@@ -135,6 +135,28 @@ CosmsCoreFileError cosms_core_file_close(struct cosms_core_file *file) {
     return COSMS_CORE_FILE_OK;
 }
 
+CosmsCoreFileError cosms_core_file_get_size(unsigned long long *size) {
+    #if defined(__GNUC__)
+    struct stat file_stat;
+    if (stat(path, &file_stat) != 0) {
+        return COSMS_CORE_FILE_COULD_NOT_READ_SIZE;
+    }
+
+    (*size) = file_stat.st_size;
+    #elif defined(_WIN32)
+    DWORD high_size;
+    DWORD low_size = GetFileSize(file, &high_size);
+    if (low_size == INVALID_FILE_SIZE && GetLastError() != NO_ERROR) {
+        CloseHandle(file);
+        return COSMS_CORE_FILE_COULD_NOT_READ_SIZE;
+    }
+
+    (*size) = ((unsigned long long)high_size << 32) | low_size;
+    #endif
+    
+    return COSMS_CORE_FILE_OK;
+}
+
 CosmsCoreFileError cosms_core_file_read(const char *path, char **content, unsigned long long *size) {
     #if defined(__GNUC__)
     struct stat file_stat;
@@ -225,7 +247,6 @@ CosmsCoreFileError cosms_core_file_read(const char *path, char **content, unsign
     }
 
     unsigned long long file_size = ((unsigned long long)high_size << 32) | low_size;
-
     if (size != NULL) {
         *size = file_size;
     }