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Tumblr removes embed code from posts. To show your widget, add it to a blog page or to your custom theme. The same steps work for Facebook, X, TikTok and YouTube widgets.
Tumblr does not allow JavaScript on blog pages. Before you copy the code, open the widget in SnapWidget, set Responsive to No and click Update & Get Widget. If the code still has <script> or <link> lines, delete them and keep only the <iframe> line.

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In SnapWidget

  1. Create your widget, or open an existing widget from your dashboard.
  2. Click Get Widget. For an existing widget, click Update & Get Widget.
  3. In the You’re One Step Away window, click Copy To Clipboard.

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In Tumblr

  1. In Tumblr, open Settings and select your blog. Under Custom theme, turn on Enable custom theme. Then click Edit theme. The Custom Theme setting with the Edit theme button
  2. In the theme editor sidebar, click Add a page. The Add a page option in the theme editor
  3. Select Standard Layout. Enter the page URL and a Page Title, and turn on Show a link to this page.
  4. Paste your code into the page body. A Tumblr page with the widget code
  5. Click Save.

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Add the widget to every page of your blog

To show the widget on all pages, add the code to your theme. In the theme editor, click Edit HTML and paste your code where you want the widget to show. Click Update Preview, then click Save.

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Check your widget

Open the new page on your blog. The widget shows your latest Instagram posts.