diff --git a/src/Edit.c b/src/Edit.c
index ba0cb979b9..95ab59888e 100644
--- a/src/Edit.c
+++ b/src/Edit.c
@@ -2289,6 +2289,168 @@ void EditBase64Decode(bool decodeAsHex) {
 		EditReplaceMainSelection(outLen, (char *)output);
 	}
 	NP2HeapFree(output);
+}
+
+// indent function for json
+static void append_indent(char *result, int number) {
+	for (int i = 0; i < number * JSON_INDENT; ++i) {
+		result[strlen(result)] = ' ';
+	}
+}
+
+// format or compress json
+void EditJSONFormat(bool isFormat) {
+	const size_t len = SciCall_GetSelTextLength();
+	if (len == 0) {
+		return;
+	}
+
+	char *json = (char *)NP2HeapAlloc(len + 1);
+	SciCall_GetSelBytes(json);
+
+	if (isFormat) {
+		long long length = strlen(json);
+		bool is_escape_mode = false;
+		int indent_number = 0;
+		char current_char;
+		char wrap_char = '\0';
+		long long size = (length * 2) + 1;
+		char *result = (char *)malloc(size);
+		memset(result, 0, size);
+
+		long long result_index = 0;
+
+		for (long i = 0; i < length; i++) {
+			current_char = json[i];
+
+			if (wrap_char == '\0' &&
+				(current_char == '\t' || current_char == '\n' || current_char == '\r' || current_char == ' ')) {
+				continue;
+			}
+			if (wrap_char == '\0' && current_char == ':') {
+				result[result_index++] = current_char;
+				result[result_index++] = ' ';
+				continue;
+			}
+
+			if (current_char == '"') {
+				if (wrap_char == '\0') {
+					wrap_char = current_char;
+				} else if (is_escape_mode) {
+					is_escape_mode = false;
+				} else {
+					wrap_char = '\0';
+				}
+
+				result[result_index++] = current_char;
+				continue;
+			}
+
+			if (current_char == '\\') {
+				if (wrap_char != '\0') {
+					is_escape_mode = !is_escape_mode;
+				}
+				result[result_index++] = current_char;
+				continue;
+			}
+
+			if (wrap_char != '\0') {
+				result[result_index++] = current_char;
+				continue;
+			}
+
+			if (current_char == '[' || current_char == '{') {
+				result[result_index++] = current_char;
+				result[result_index++] = '\n';
+				indent_number++;
+				append_indent(result + result_index, indent_number);
+				result_index += indent_number * JSON_INDENT;
+				continue;
+			}
+
+			if (current_char == ']' || current_char == '}') {
+				result[result_index++] = '\n';
+				indent_number--;
+				append_indent(result + result_index, indent_number);
+				result_index += indent_number * JSON_INDENT;
+				result[result_index++] = current_char;
+				continue;
+			}
+
+			if (current_char == ',') {
+				result[result_index++] = current_char;
+				result[result_index++] = '\n';
+				append_indent(result + result_index, indent_number);
+				result_index += indent_number * JSON_INDENT;
+				continue;
+			}
+
+			result[result_index++] = current_char;
+
+			if (result_index + 1 >= size) {
+				size = result_index += size / 2;
+				char *new_result = realloc(result, size);
+				if (new_result == NULL) {
+					fprintf(stderr, "Error: Failed to reallocate memory in format_json() loop.\n");
+					free(result);
+					return;
+				} else {
+					result = new_result;
+				}
+			}
+		}
+
+		char *new_result = realloc(result, result_index);
+		if (new_result == NULL) {
+			fprintf(stderr, "Error: Failed to reallocate memory in format_json().\n");
+			free(result);
+			return;
+		} else {
+			result[result_index] = '\0';
+			result = new_result;
+		}
+
+		EditReplaceMainSelection(strlen(result), result);
+		NP2HeapFree(json);
+	} else {
+		long long length = strlen(json);
+		bool isWarp = false;
+		char *result = (char *)malloc(length + 1); // 分配额外空间，同时留一个位置给字符串结束符'\0'
+		memset(result, 0, length + 1);
+
+		char current_char;
+		long long result_index = 0;
+		for (int i = 0; i < length; i++) {
+			current_char = json[i];
+
+			if (current_char == '"') {
+				if (i > 0 && json[i - 1] != '\\' || (i > 1 && json[i - 2] == '\\')) {
+					isWarp = !isWarp;
+				}
+			}
+
+			if (!isWarp) {
+				if (current_char == '\t' || current_char == '\n' || current_char == '\r' || current_char == ' ') {
+					continue;
+				}
+			}
+
+			result[result_index++] = current_char;
+		}
+
+		result[result_index] = '\0';
+		char *new_result = realloc(result, result_index + 1);
+		if (new_result == NULL) {
+			fprintf(stderr, "Error: Failed to reallocate memory in compress_json().\n");
+			free(result);
+			return;
+		} else {
+			result = new_result;
+		}
+
+		EditReplaceMainSelection(strlen(result), result);
+		NP2HeapFree(json);
+	}
 }
 
 //=============================================================================
diff --git a/src/Edit.h b/src/Edit.h
index f3ee00c4b2..6261b666be 100644
--- a/src/Edit.h
+++ b/src/Edit.h
@@ -32,6 +32,7 @@
 #define NP2_MarkAllBookmark		0x00002000
 #define NP2_MarkAllSelectAll	0x00004000
 #define NP2_FromFindAll			0x00008000
+#define JSON_INDENT				4
 
 typedef struct EDITFINDREPLACE {
 	char	szFind[512];
@@ -154,6 +155,7 @@ typedef enum Base64EncodingFlag {
 } Base64EncodingFlag;
 void	EditBase64Encode(Base64EncodingFlag encodingFlag);
 void	EditBase64Decode(bool decodeAsHex);
+void	EditJSONFormat(bool isFormat);
 void	EditConvertNumRadix(int radix);
 void	EditModifyNumber(bool bIncrease);
 
diff --git a/src/Notepad2.c b/src/Notepad2.c
index 138d696ce2..9fee26bcd2 100644
--- a/src/Notepad2.c
+++ b/src/Notepad2.c
@@ -2546,7 +2546,10 @@ void MsgInitMenu(HWND hwnd, WPARAM wParam, LPARAM lParam) {
 	EnableCmd(hmenu, IDM_EDIT_NUM2HEX, i);
 	EnableCmd(hmenu, IDM_EDIT_NUM2DEC, i);
 	EnableCmd(hmenu, IDM_EDIT_NUM2BIN, i);
-	EnableCmd(hmenu, IDM_EDIT_NUM2OCT, i);
+	EnableCmd(hmenu, IDM_EDIT_NUM2OCT, i);
+
+	EnableCmd(hmenu, IDM_EDIT_JSON_FORMAT, i);
+	EnableCmd(hmenu, IDM_EDIT_JSON_COMPRESS, i);
 
 	//EnableCmd(hmenu, IDM_EDIT_INCREASENUM, i);
 	//EnableCmd(hmenu, IDM_EDIT_DECREASENUM, i);
@@ -3785,6 +3788,13 @@ LRESULT MsgCommand(HWND hwnd, WPARAM wParam, LPARAM lParam) {
 		BeginWaitCursor();
 		EditBase64Decode(LOWORD(wParam) == IDM_EDIT_BASE64_DECODE_AS_HEX);
 		EndWaitCursor();
+		break;
+
+	case IDM_EDIT_JSON_FORMAT:
+	case IDM_EDIT_JSON_COMPRESS:
+		BeginWaitCursor();
+		EditJSONFormat(LOWORD(wParam) == IDM_EDIT_JSON_FORMAT);
+		EndWaitCursor();
 		break;
 
 	case IDM_EDIT_NUM2HEX:
diff --git a/src/Notepad2.rc b/src/Notepad2.rc
index da82093ab6..ef16fa47a4 100644
--- a/src/Notepad2.rc
+++ b/src/Notepad2.rc
@@ -718,6 +718,11 @@ BEGIN
 			MENUITEM "Custom Action &1\tCtrl+Shift+1",		CMD_CUSTOM_ACTION1
 			MENUITEM "Custom Action &2\tCtrl+Shift+2",		CMD_CUSTOM_ACTION2
 		END
+		POPUP "&JSON"
+		BEGIN
+			MENUITEM "JSON &Format",						IDM_EDIT_JSON_FORMAT
+			MENUITEM "JSON &Compress",						IDM_EDIT_JSON_COMPRESS
+		END
 		POPUP "&Base64"
 		BEGIN
 			MENUITEM "Standard &Encode",					IDM_EDIT_BASE64_ENCODE
diff --git a/src/resource.h b/src/resource.h
index 2fff69c431..fef7abb1d1 100644
--- a/src/resource.h
+++ b/src/resource.h
@@ -758,7 +758,9 @@
 #define IDM_EDIT_BASE64_SAFE_ENCODE				40495
 #define IDM_EDIT_BASE64_HTML_EMBEDDED_IMAGE		40496
 #define IDM_EDIT_BASE64_DECODE					40497
-#define IDM_EDIT_BASE64_DECODE_AS_HEX			40498
+#define IDM_EDIT_BASE64_DECODE_AS_HEX			40498
+#define IDM_EDIT_JSON_FORMAT					40499
+#define IDM_EDIT_JSON_COMPRESS					40509
 
 #define IDM_HELP_ABOUT					40500	// F1
 #define IDM_CMDLINE_HELP				40501