diff --git a/.github/workflows/node.js.yml b/.github/workflows/node.js.yml
deleted file mode 100644
index cac5823..0000000
--- a/.github/workflows/node.js.yml
+++ /dev/null
@@ -1,32 +0,0 @@
-# This workflow will do a clean install of node dependencies, cache/restore them, build the source code and run tests across different versions of node
-# For more information see: https://help.github.com/actions/language-and-framework-guides/using-nodejs-with-github-actions
-
-name: Node.js CI
-
-on:
-  push:
-    branches: [ main ]
-  pull_request:
-    branches: [ main ]
-
-jobs:
-  build:
-
-    runs-on: ubuntu-latest
-
-    strategy:
-      matrix:
-        node-version: [12.x, 14.x, 16.x]
-        # See supported Node.js release schedule at https://nodejs.org/en/about/releases/
-
-    steps:
-    - uses: actions/checkout@v2
-    - name: Use Node.js ${{ matrix.node-version }}
-      uses: actions/setup-node@v2
-      with:
-        node-version: ${{ matrix.node-version }}
-        cache: 'npm'
-    - run: npm install -g grunt-cli
-    - run: npm ci
-    - run: npm test
-    - run: npm run build
diff --git a/.gitignore b/.gitignore
index 6629c8c..ecba101 100644
--- a/.gitignore
+++ b/.gitignore
@@ -24,3 +24,5 @@ build
 # Deployed apps should consider commenting this line out:
 # see https://npmjs.org/doc/faq.html#Should-I-check-my-node_modules-folder-into-git
 node_modules
+.vscode
+.github
\ No newline at end of file
diff --git a/dist/textgrid.js b/dist/textgrid.js
index 0d3aed1..3415e43 100644
--- a/dist/textgrid.js
+++ b/dist/textgrid.js
@@ -1,6 +1,6 @@
-/*! textgrid - v2.2.0 - 2021-12-14
+/*! textgrid - v2.2.0 - 2025-10-17
 * https://github.com/OpenSourceFieldlinguistics/PraatTextGridJS
-* Copyright (c) 2021 OpenSourceFieldLinguistics Contribs; Licensed Apache 2.0 */
+* Copyright (c) 2025 OpenSourceFieldLinguistics Contribs; Licensed Apache 2.0 */
 (function(exports) {
 
 	'use strict';
@@ -270,6 +270,63 @@
 		}
 	};
 
+	TextGrid.jsonToTextgrid = function(json) {
+		var textgrid = '';
+		
+		// 写入文件头
+		textgrid += 'File type = "ooTextFile"\n';
+		textgrid += 'Object class = "TextGrid"\n\n';
+		
+		// 写入基本属性
+		textgrid += 'xmin = ' + (json.xmin || 0) + '\n';
+		textgrid += 'xmax = ' + (json.xmax || 0) + '\n';
+		textgrid += 'tiers? <exists>\n';
+		textgrid += 'size = ' + (json.items ? json.items.length : 0) + '\n';
+		textgrid += 'item []:\n';
+		
+		// 处理每个层级
+		if (json.items) {
+			for (var i = 0; i < json.items.length; i++) {
+				var item = json.items[i];
+				
+				// 写入层级头
+				textgrid += '    item [' + (i + 1) + ']:\n';
+				
+				// 写入层级属性
+				textgrid += '        class = "' + (item.class || 'IntervalTier') + '"\n';
+				textgrid += '        name = "' + (item.name || '') + '"\n';
+				textgrid += '        xmin = ' + (item.xmin || 0) + '\n';
+				textgrid += '        xmax = ' + (item.xmax || 0) + '\n';
+				
+				// 处理区间层级
+				if (item.class === 'IntervalTier' && item.intervals) {
+					textgrid += '        intervals: size = ' + item.intervals.length + '\n';
+					
+					for (var j = 0; j < item.intervals.length; j++) {
+						var interval = item.intervals[j];
+						textgrid += '        intervals [' + (j + 1) + ']:\n';
+						textgrid += '            xmin = ' + (interval.xmin || 0) + '\n';
+						textgrid += '            xmax = ' + (interval.xmax || 0) + '\n';
+						textgrid += '            text = "' + (interval.text || '') + '"\n';
+					}
+				}
+				// 处理点层级
+				else if (item.class === 'TextTier' && item.points) {
+					textgrid += '        points: size = ' + item.points.length + '\n';
+					
+					for (var k = 0; k < item.points.length; k++) {
+						var point = item.points[k];
+						textgrid += '        points [' + (k + 1) + ']:\n';
+						textgrid += '            number = ' + (point.number || 0) + '\n';
+						textgrid += '            text = "' + (point.text || '') + '"\n';
+					}
+				}
+			}
+		}
+		
+		return textgrid;
+	};
+
 	exports.TextGrid = TextGrid;
 
 }(typeof exports === "object" && exports || this));
diff --git a/dist/textgrid.min.js b/dist/textgrid.min.js
index a924451..57457f2 100644
--- a/dist/textgrid.min.js
+++ b/dist/textgrid.min.js
@@ -1,5 +1,5 @@
-/*! textgrid - v2.2.0 - 2021-12-14
+/*! textgrid - v2.2.0 - 2025-10-17
 * https://github.com/OpenSourceFieldlinguistics/PraatTextGridJS
-* Copyright (c) 2021 OpenSourceFieldLinguistics Contribs; Licensed Apache 2.0 */
+* Copyright (c) 2025 OpenSourceFieldLinguistics Contribs; Licensed Apache 2.0 */
 
-!function(e){"use strict";function h(e){for(var t,i,n={},r=0;r<e.length;r++)t=(i=e[r].split(" = "))[0].trim().replace(/ /g,"_"),i=i[1].trim().replace(/"/g,""),n[t]=i;return n}var t={init:function(){return"init"}};t.textgridToJSON=function(e,t){for(var i,n,r,s,a,l,m=e.split("\n"),o={items:[]},f=null,g="Unknown",p=[];0<m.length;)(l=m.shift())?0!==l.search(/ /)&&0!==l.search(/\t/)?2===(s=l.split(" = ")).length&&(i=s[0].trim().replace(/ /g,"_"),n=s[1].trim().replace(/"/g,""),o[i]=n,"File_name"===i&&(g=n+"",console.log(" Found a file name "+g),p.push(g))):-1!==l.search(/\[[\0-9]+\]/)?"item"===(a=(s=l.split("["))[0].trim())?(console.log("  Found an item for "+g),f&&(f.fileName=g,o.items.push(f)),f={}):"points"===a?(r=h([m.shift(),m.shift()]),f[a]=f[a]||[],f[a].push(r)):"intervals"===a&&(r=h([m.shift(),m.shift(),m.shift()]),f[a]=f[a]||[],f[a].push(r)):2===(s=l.split(" = ")).length&&(i=s[0].trim().replace(/ /g,"_"),n=s[1].trim().replace(/"/g,""),-1<i.indexOf(":_size")&&(i=i.replace(":_","_"),n=parseInt(n,10)),f[i]=n):(l=m.shift())||(f&&(f.fileName=g,o.items.push(f)),f=null,g="Unknown",console.log("Reset filename if there is are two empty lines"));return f&&(f.fileName=g,o.items.push(f)),o.fileNames=p,o},t.textgridToIGT=function(e,t){return this.jsonToIGT(this.textgridToJSON(e,t),t)},t.jsonToIGT=function(e,t){var i,n,r={};e.intervalsByXmin={};var s,a,l,m=!(e.intervalsByText={}),o=0,f=/[ #?!'".,\/\(\)\*\#0-9-]/g;if(e.items.map(function(e){return-1<e.name.indexOf("@")&&(e.speaker=e.name.substring(e.name.indexOf("@")+1).trim(),e.name=e.name.substring(0,e.name.indexOf("@")).trim(),o++),t&&(e.speaker=e.name),"silences"===e.name&&(e.name="utterances"),e.name}).length-o==0&&(m=!0),!e||!e.items)return e;for(i=0;i<e.items.length;i++)if(r[e.items[i].name]=e.items[i].intervals_size||e.items[i].points_size,e.items[i].intervals)for(n=0;n<e.items[i].intervals.length;n++)l=this.marginForConsideringIntervalsMatching(e.items[i].intervals[n].xmin),a=this.marginForConsideringIntervalsMatching(e.items[i].intervals[n].xmax),(s=e.items[i].intervals[n]).fileName=e.items[i].fileName,s.tierName=e.items[i].name,s.speaker=e.items[i].speaker,e.intervalsByXmin[l=l+":"+a]=e.intervalsByXmin[l]||[],e.intervalsByXmin[l].push(s),(a=s.text?s.text.trim().toLocaleLowerCase().replace(f,""):"")&&("utterance"===a&&e.items[i].intervals.length<3&&(a=(a=-1<(a=s.fileName).indexOf(".")?a.substring(0,s.fileName.lastIndexOf(".")):a).trim().replace(/_/g," "),s.text=a),e.intervalsByText[a]=e.intervalsByText[a]||[],l=e.intervalsByText[a].length,e.intervalsByText[a][l]=s);return e.probablyFromElanWithSpeakerEncodedInTierName=m,e.isIGTNestedOrAlignedOrBySpeaker=this.isIGTNestedOrAlignedOrBySpeaker(e),e},t.isIGTNestedOrAlignedOrBySpeaker=function(e){var t,i,n,r=e.intervalsByXmin,s={},a=0,l=!1,m=!1;for(n in e.items)e.items.hasOwnProperty(n)&&e.items[n].speaker&&(l=!0);for(i in r)s[r[i].length]=s[r[i].length]?s[r[i].length]+1:1,a++;for(t in s)s[t]=s[t]/a,1<t&&.1<s[t]&&(m=!0);return{histogram:s,probablyAligned:m=e.fileNames&&4<e.fileNames.length?!1:m,probablyBySpeaker:l}},t.marginForConsideringIntervalsMatching=function(e,t){return t=t?100/t:5,(Math.round(e*t)/t).toFixed(2)},t.printIGT=function(e){function t(e){return e.xmin+","+e.xmax+","+e.text}for(var i in e)console.log(i),e.hasOwnProperty(i)&&console.log(e[i].map(t))},e.TextGrid=t}("object"==typeof exports&&exports||this);
\ No newline at end of file
+!function(e){"use strict";function p(e){for(var t,n,i={},r=0;r<e.length;r++)t=(n=e[r].split(" = "))[0].trim().replace(/ /g,"_"),n=n[1].trim().replace(/"/g,""),i[t]=n;return i}var t={init:function(){return"init"}};t.textgridToJSON=function(e,t){for(var n,i,r,s,a,l,m=e.split("\n"),o={items:[]},f=null,x="Unknown",g=[];0<m.length;)(l=m.shift())?0!==l.search(/ /)&&0!==l.search(/\t/)?2===(s=l.split(" = ")).length&&(n=s[0].trim().replace(/ /g,"_"),i=s[1].trim().replace(/"/g,""),o[n]=i,"File_name"===n&&(x=i+"",console.log(" Found a file name "+x),g.push(x))):-1!==l.search(/\[[\0-9]+\]/)?"item"===(a=(s=l.split("["))[0].trim())?(console.log("  Found an item for "+x),f&&(f.fileName=x,o.items.push(f)),f={}):"points"===a?(r=p([m.shift(),m.shift()]),f[a]=f[a]||[],f[a].push(r)):"intervals"===a&&(r=p([m.shift(),m.shift(),m.shift()]),f[a]=f[a]||[],f[a].push(r)):2===(s=l.split(" = ")).length&&(n=s[0].trim().replace(/ /g,"_"),i=s[1].trim().replace(/"/g,""),-1<n.indexOf(":_size")&&(n=n.replace(":_","_"),i=parseInt(i,10)),f[n]=i):(l=m.shift())||(f&&(f.fileName=x,o.items.push(f)),f=null,x="Unknown",console.log("Reset filename if there is are two empty lines"));return f&&(f.fileName=x,o.items.push(f)),o.fileNames=g,o},t.textgridToIGT=function(e,t){return this.jsonToIGT(this.textgridToJSON(e,t),t)},t.jsonToIGT=function(e,t){var n,i,r={};e.intervalsByXmin={};var s,a,l,m=!(e.intervalsByText={}),o=0,f=/[ #?!'".,\/\(\)\*\#0-9-]/g;if(e.items.map(function(e){return-1<e.name.indexOf("@")&&(e.speaker=e.name.substring(e.name.indexOf("@")+1).trim(),e.name=e.name.substring(0,e.name.indexOf("@")).trim(),o++),t&&(e.speaker=e.name),"silences"===e.name&&(e.name="utterances"),e.name}).length-o==0&&(m=!0),!e||!e.items)return e;for(n=0;n<e.items.length;n++)if(r[e.items[n].name]=e.items[n].intervals_size||e.items[n].points_size,e.items[n].intervals)for(i=0;i<e.items[n].intervals.length;i++)l=this.marginForConsideringIntervalsMatching(e.items[n].intervals[i].xmin),a=this.marginForConsideringIntervalsMatching(e.items[n].intervals[i].xmax),(s=e.items[n].intervals[i]).fileName=e.items[n].fileName,s.tierName=e.items[n].name,s.speaker=e.items[n].speaker,e.intervalsByXmin[l=l+":"+a]=e.intervalsByXmin[l]||[],e.intervalsByXmin[l].push(s),(a=s.text?s.text.trim().toLocaleLowerCase().replace(f,""):"")&&("utterance"===a&&e.items[n].intervals.length<3&&(a=(a=-1<(a=s.fileName).indexOf(".")?a.substring(0,s.fileName.lastIndexOf(".")):a).trim().replace(/_/g," "),s.text=a),e.intervalsByText[a]=e.intervalsByText[a]||[],l=e.intervalsByText[a].length,e.intervalsByText[a][l]=s);return e.probablyFromElanWithSpeakerEncodedInTierName=m,e.isIGTNestedOrAlignedOrBySpeaker=this.isIGTNestedOrAlignedOrBySpeaker(e),e},t.isIGTNestedOrAlignedOrBySpeaker=function(e){var t,n,i,r=e.intervalsByXmin,s={},a=0,l=!1,m=!1;for(i in e.items)e.items.hasOwnProperty(i)&&e.items[i].speaker&&(l=!0);for(n in r)s[r[n].length]=s[r[n].length]?s[r[n].length]+1:1,a++;for(t in s)s[t]=s[t]/a,1<t&&.1<s[t]&&(m=!0);return{histogram:s,probablyAligned:m=e.fileNames&&4<e.fileNames.length?!1:m,probablyBySpeaker:l}},t.marginForConsideringIntervalsMatching=function(e,t){return t=t?100/t:5,(Math.round(e*t)/t).toFixed(2)},t.printIGT=function(e){function t(e){return e.xmin+","+e.xmax+","+e.text}for(var n in e)console.log(n),e.hasOwnProperty(n)&&console.log(e[n].map(t))},t.jsonToTextgrid=function(e){var t="";if(t+='File type = "ooTextFile"\n',t+='Object class = "TextGrid"\n\n',t+="xmin = "+(e.xmin||0)+"\n",t+="xmax = "+(e.xmax||0)+"\n",t+="tiers? <exists>\n",t+="size = "+(e.items?e.items.length:0)+"\n",t+="item []:\n",e.items)for(var n=0;n<e.items.length;n++){var i=e.items[n];if(t+="    item ["+(n+1)+"]:\n",t+='        class = "'+(i.class||"IntervalTier")+'"\n',t+='        name = "'+(i.name||"")+'"\n',t+="        xmin = "+(i.xmin||0)+"\n",t+="        xmax = "+(i.xmax||0)+"\n","IntervalTier"===i.class&&i.intervals){t+="        intervals: size = "+i.intervals.length+"\n";for(var r=0;r<i.intervals.length;r++){var s=i.intervals[r];t+="        intervals ["+(r+1)+"]:\n",t+="            xmin = "+(s.xmin||0)+"\n",t+="            xmax = "+(s.xmax||0)+"\n",t+='            text = "'+(s.text||"")+'"\n'}}else if("TextTier"===i.class&&i.points){t+="        points: size = "+i.points.length+"\n";for(var a=0;a<i.points.length;a++){var l=i.points[a];t+="        points ["+(a+1)+"]:\n",t+="            number = "+(l.number||0)+"\n",t+='            text = "'+(l.text||"")+'"\n'}}}return t},e.TextGrid=t}("object"==typeof exports&&exports||this);
\ No newline at end of file
diff --git a/lib/textgrid.js b/lib/textgrid.js
index cb05554..de024f1 100644
--- a/lib/textgrid.js
+++ b/lib/textgrid.js
@@ -275,6 +275,63 @@
 		}
 	};
 
+	TextGrid.jsonToTextgrid = function(json) {
+		var textgrid = '';
+		
+		// 写入文件头
+		textgrid += 'File type = "ooTextFile"\n';
+		textgrid += 'Object class = "TextGrid"\n\n';
+		
+		// 写入基本属性
+		textgrid += 'xmin = ' + (json.xmin || 0) + '\n';
+		textgrid += 'xmax = ' + (json.xmax || 0) + '\n';
+		textgrid += 'tiers? <exists>\n';
+		textgrid += 'size = ' + (json.items ? json.items.length : 0) + '\n';
+		textgrid += 'item []:\n';
+		
+		// 处理每个层级
+		if (json.items) {
+			for (var i = 0; i < json.items.length; i++) {
+				var item = json.items[i];
+				
+				// 写入层级头
+				textgrid += '    item [' + (i + 1) + ']:\n';
+				
+				// 写入层级属性
+				textgrid += '        class = "' + (item.class || 'IntervalTier') + '"\n';
+				textgrid += '        name = "' + (item.name || '') + '"\n';
+				textgrid += '        xmin = ' + (item.xmin || 0) + '\n';
+				textgrid += '        xmax = ' + (item.xmax || 0) + '\n';
+				
+				// 处理区间层级
+				if (item.class === 'IntervalTier' && item.intervals) {
+					textgrid += '        intervals: size = ' + item.intervals.length + '\n';
+					
+					for (var j = 0; j < item.intervals.length; j++) {
+						var interval = item.intervals[j];
+						textgrid += '        intervals [' + (j + 1) + ']:\n';
+						textgrid += '            xmin = ' + (interval.xmin || 0) + '\n';
+						textgrid += '            xmax = ' + (interval.xmax || 0) + '\n';
+						textgrid += '            text = "' + (interval.text || '') + '"\n';
+					}
+				}
+				// 处理点层级
+				else if (item.class === 'TextTier' && item.points) {
+					textgrid += '        points: size = ' + item.points.length + '\n';
+					
+					for (var k = 0; k < item.points.length; k++) {
+						var point = item.points[k];
+						textgrid += '        points [' + (k + 1) + ']:\n';
+						textgrid += '            number = ' + (point.number || 0) + '\n';
+						textgrid += '            text = "' + (point.text || '') + '"\n';
+					}
+				}
+			}
+		}
+		
+		return textgrid;
+	};
+
 	exports.TextGrid = TextGrid;
 
 }(typeof exports === "object" && exports || this));
diff --git a/test/textgrid-spec.js b/test/textgrid-spec.js
index 30c11e1..05271ba 100644
--- a/test/textgrid-spec.js
+++ b/test/textgrid-spec.js
@@ -166,4 +166,20 @@ describe("lib/textgrid", function() {
     console.log(json.items.length);
     expect(json.items.length).toEqual(1);
   });
+
+  it("TextGrid to json and json to TextGrid", function() {
+     var sampleUtterancesTextGrid = fs.readFileSync(__dirname + "/../data/sampleUtterances.TextGrid", {
+      encoding: "UTF-8"
+    });
+    var json = textgrid.textgridToJSON(sampleUtterancesTextGrid);
+    
+    var str = textgrid.jsonToTextgrid(json);
+    expect(typeof str).toBe("string");
+
+    var json2 = textgrid.textgridToJSON(sampleUtterancesTextGrid);
+    expect(typeof json2).toBe("object");
+
+    console.log("json 2 success yes!!!! this is my first commit in github");
+  })
+
 });