To hide (or show) widgets in particular posts, static pages, homepage or archive pages, you can use conditional tags.

To hide (or show) widgets in particular posts, static pages, homepage or archive pages, you can use conditional tags.

Step 1. Go to Blogger's Dashboard > Layout and name the HTML/Javascript gadgets that you have already added. Doing this, it will be easier for you to identify the widgets that you have in your Blogger's template. Give it a unique title so that it does not match with any of the titles of any other widgets already added.

Step 2. Next thing to do is to go to Template and click on Edit HTML

Step 3. Select the "Expand Widget Templates" checkbox.

Step 4. Find the widget's title in the HTML by using Ctrl+F and entering the widget's name in the search box.
Let's say that the title for one of my widgets is "Recent Posts". After searching for the widget's name, I will find a similar code in my template:

<b:widget id='HTML1' locked='false' title='Recent Posts' type='HTML'>
<b:includable id='main'>
<!-- only display title if it's non-empty -->
<b:if cond='data:title != ""'>
<h2 class='title'><data:title/></h2>
</b:if>
<div class='widget-content'>
<data:content/>
</div>

<b:include name='quickedit'/>
</b:includable>
</b:widget>  

This code represents the widget/gadget that I have added in the Page Elements location (Layout).

Step 5. After you've found your widget's code, add the following conditional tags marked with red just below and above to hide the widget from specific pages or posts in Blogger. For instance, in case you want:

To show the widget only in Homepage:

<b:widget id='HTML1' locked='false' title='Recent Posts' type='HTML'>
<b:includable id='main'>
<b:if cond='data:blog.url == data:blog.homepageUrl'>
<!-- only display title if it's non-empty -->
<b:if cond='data:title != ""'>
<h2 class='title'><data:title/></h2>
</b:if>
<div class='widget-content'>
<data:content/>
</div>

<b:include name='quickedit'/>
</b:if>
</b:includable>
</b:widget>

To show Blogger widget only in post pages 

<b:widget id='HTML1' locked='false' title='Recent Posts' type='HTML'>
<b:includable id='main'>
<b:if cond='data:blog.pageType == "item"'>
<!-- only display title if it's non-empty -->
<b:if cond='data:title != ""'>
<h2 class='title'><data:title/></h2>
</b:if>
<div class='widget-content'>
<data:content/>
</div>

<b:include name='quickedit'/>
</b:if>
</b:includable>
</b:widget>

To show the widget in a specific page
 

<b:widget id='HTML1' locked='false' title='Recent Posts' type='HTML'>
<b:includable id='main'>
<b:if cond='data:blog.url == "URL of the page"'>
<!-- only display title if it's non-empty -->
<b:if cond='data:title != ""'>
<h2 class='title'><data:title/></h2>
</b:if>
<div class='widget-content'>
<data:content/>
</div>

<b:include name='quickedit'/>
</b:if>
</b:includable>
</b:widget>

Note: Replace URL of the page with the address of the page in which you want the widget to appear

To hide a widget only in a particular page

<b:widget id='HTML1' locked='false' title='Recent Posts' type='HTML'>
<b:includable id='main'>
<b:if cond='data:blog.url != "URL of the page"'>
<!-- only display title if it's non-empty -->
<b:if cond='data:title != ""'>
<h2 class='title'><data:title/></h2>
</b:if>
<div class='widget-content'>
<data:content/>
</div>

<b:include name='quickedit'/>
</b:if>
</b:includable>
</b:widget> 

To show widgets only in static pages

<b:widget id='HTML1' locked='false' title='Recent Posts' type='HTML'>
<b:includable id='main'>
<b:if cond='data:blog.pageType == "static_page"'>
<!-- only display title if it's non-empty -->
<b:if cond='data:title != ""'>
<h2 class='title'><data:title/></h2>
</b:if>
<div class='widget-content'>
<data:content/>
</div>

<b:include name='quickedit'/>
</b:if>
</b:includable>
</b:widget> 

To hide widgets in Static Pages

<b:widget id='HTML1' locked='false' title='Recent Posts' type='HTML'>
<b:includable id='main'>
<b:if cond='data:blog.pageType != "static_page"'>
<!-- only display title if it's non-empty -->
<b:if cond='data:title != ""'>
<h2 class='title'><data:title/></h2>
</b:if>
<div class='widget-content'>
<data:content/>
</div>

<b:include name='quickedit'/>
</b:if>
</b:includable>
</b:widget> 

To show widgets only in Archive Pages

 <b:widget id='HTML1' locked='false' title='Recent Posts' type='HTML'>
<b:includable id='main'>
<b:if cond='data:blog.pageType == "archive"'>
<!-- only display title if it's non-empty -->
<b:if cond='data:title != ""'>
<h2 class='title'><data:title/></h2>
</b:if>
<div class='widget-content'>
<data:content/>
</div>

<b:include name='quickedit'/>
</b:if>
</b:includable>
</b:widget> 

Step 6. After you have added the conditional tags, Save Template and view your blog.

That's it!