Migrating a WordPress site usually ends in frustration when the backup file is too big to import. The All-in-One WP Migration Unlimited Extension fixes exactly that — it removes the upload size cap from the free All-in-One WP Migration plugin, so you can import an export file of any size. Install it, activate it, done. No settings to configure, no code to touch.
The base plugin handles the export and import workflow, and this extension simply lifts the restriction that blocks large .wpress files. If your site has grown past a couple of hundred megabytes of media, this is the piece you are missing. Pair it with a proper backup plugin so migrations stop being a gamble.
Competitive Features
- Unlimited import size — the whole point: no cap on the
.wpressfiles you can import, so full e-commerce catalogs and media libraries move without splitting archives - Zero configuration — activate the extension and the limit disappears; there is genuinely nothing to set up
- Drag-and-drop import — combined with the base plugin you can drag a backup file straight into the browser instead of fighting FTP uploads
- Works with cloud extensions — the same developer offers Google Drive and other storage extensions, so exports can live off-server
- Multisite support available — a separate extension adds multisite export and import if you run a network
- One-click overwrite — imports can replace the existing site content, which makes staging-to-production pushes straightforward
- No bloat — the extension is tiny, has no dashboard of its own, and never slows the admin area down
Key Features
- Size limit removal — overrides the artificial import restriction baked into the free version of All-in-One WP Migration, which exists only because of hosting upload limits
- Full site transfer — moves database, media, plugins, and themes in a single archive, keeping URLs and paths intact for the target domain
- Find and replace on import — the base plugin rewrites old URLs to the new site automatically, so you do not run serial search-replace queries afterward
- Compatibility checks — the importer validates the PHP version and plugin requirements before it starts, which prevents half-broken restores
- Bypass filters — import options let you skip or overwrite plugins and themes selectively, useful when the destination already has the same stack
- Works on shared hosting — because the import runs through PHP chunking rather than shell commands, it survives on hosts without SSH access
- GPL licensed — download it here under the GPL and use it on unlimited client sites
Comparison with Competitors
All-in-One WP Migration Unlimited vs Duplicator Pro
| Feature | All-in-One WP Migration Unlimited | Duplicator Pro |
|---|---|---|
| Import size limit | None | Depends on hosting upload settings |
| Setup complexity | Install and activate | Package build required |
| Cloud storage integrations | Via extensions (Google Drive, Dropbox) | Built-in (Google Drive, Dropbox, S3) |
| Scheduled backups | No | Yes |
| Multisite support | Separate extension | Included |
| Best for | Quick site transfers | Ongoing backup routines |
All-in-One WP Migration Unlimited wins on simplicity: no packages, no build steps. Duplicator Pro is the stronger choice when you want scheduled backups and cloud sync in one tool.
All-in-One WP Migration Unlimited vs WPvivid Backup Pro
| Feature | All-in-One WP Migration Unlimited | WPvivid Backup Pro |
|---|---|---|
| Primary purpose | Migration and import | Backup and migration |
| Import size cap | Removed entirely | Configurable, hosting-dependent |
| Interface | Drag-and-drop importer | Classic settings screens |
| Staging support | No | Yes |
| Learning curve | Minimal | Moderate |
| Best for | One-off moves and restores | Recurring backup schedules |
If the job is “move this site today,” the Unlimited Extension is faster. If the job is “protect this site forever,” WPvivid’s scheduling earns its keep.
Recommended Stack — keep the Unlimited Extension for migrations and pair it with a scheduled backup tool like UpdraftPlus Premium so restores are never your only recovery option. On multilingual sites, check how migration interacts with translation plugins before you move a production site.
Official Changelog
Version 2.87
Release Date: August 11, 2026
- Improvement: improved output escaping across the plugin’s admin screens.
Version 2.86
Release Date: July 15, 2026
- Added –exclude-files option to the WP-CLI backup command.
Version 2.85
Release Date: June 24, 2026
- Fixed a stored XSS vulnerability in the backups path setting.
- Fixed the Restore button failing on the backups page.
Frequently Asked Questions
Do I need the free All-in-One WP Migration plugin for this to work?
Yes. The Unlimited Extension is an add-on, not a standalone plugin. Install and activate All-in-One WP Migration first, then add the extension on top.
What was the import limit in the free version?
It depends on your hosting, but the free version typically caps imports at a few dozen megabytes. The extension removes that ceiling entirely, so a 2 GB export imports just as easily as a 20 MB one.
Does it speed up imports, or just remove the limit?
It removes the limit. Import speed still depends on your server’s PHP settings, though the chunked importer is generally tolerant of modest max_execution_time values.
Can I use it on multisite?
For multisite networks you need the separate Multisite Extension, which handles network-level exports and imports. This Unlimited Extension covers the size limit only.
Will importing overwrite my existing content?
The importer lets you choose. A full import replaces the site’s database content and files, while the overwrite filters let you exclude specific plugins, themes, or media if you want a partial restore.
Is the file format compatible with other backup plugins?
No. The .wpress archive is specific to All-in-One WP Migration. You cannot import a Duplicator or UpdraftPlus package with it.
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