Sugeng Offline Migrator for Blogger moves a Blogger blog to WordPress using only your Google Takeout backup files. Because everything is read from files, blogs that were deleted or locked can still be migrated.

Unlike importers that require your old blog to stay online, Sugeng Offline Migrator for Blogger works fully offline. You download the Takeout archive once, upload it to the wizard, and the plugin does the rest: posts, pages, threaded comments, drafts, labels, images, and 301 redirects.

Key features:

Import posts, pages, threaded comments, drafts, and labels from the Takeout feed.atom.
Restore original Blogger slugs and URLs from the b:filename metadata.
Two image options that can be combined: import offline from the Takeout Albums folder, and/or download still-live external URLs to the media library; image URLs inside content are rewritten automatically. Leave both unchecked to skip image import.
Two permalink modes: Mode A keeps the original Blogger URLs, Mode B uses new root URLs (/slug/) with automatic 301 redirects from the old URLs.
Redirect export: review old-to-new URL mapping and export CSV/JSON compatible with the Redirection plugin, so old URLs keep working even after this plugin is removed.
Optional conversion of content HTML to Gutenberg blocks during import.
Chunked AJAX processing, safe for large feeds on shared hosting.
Archives up to 1024 MB by default (changeable with the bmig_max_zip_mb filter).
Interrupted uploads resume from the parts already on the server instead of uploading the archive again.
Jobs can be resumed after a page refresh without duplicating content.
Accepts both .zip and .tgz Takeout archives.