All-in-One WP Migration is the migration plugin of choice for people who want the absolute simplest possible move: you export your whole site to a single file on the old site, and import that file on the new site, and the plugin handles everything in between — files, database, and URL fixes — with almost no technical steps. Its one-click export-and-import model is genuinely beginner-friendly, which is why it is so popular, with a single well-known caveat around file size that this guide covers.

You will learn how All-in-One WP Migration works, how to export your site to a single file, how to prepare the new site and import that file, how the plugin handles the database and URLs automatically, the important file-size limit and how to deal with it, and how to test and go live. By the end you will be able to migrate a WordPress site with this plugin in the simplest way possible, and know exactly when its free limit applies to you.

How All-in-One WP Migration works

All-in-One WP Migration works on the simplest possible model: on the old site, you export your entire WordPress site — files, database, plugins, themes, and media — into a single downloadable file. On the new site, you install the same plugin and import that file, and the plugin unpacks everything and rebuilds your site automatically, including reconnecting the database and fixing the URLs.

What makes it stand out is how little the user has to do or understand. There is no manual database export, no wp-config editing, no separate search-and-replace — the plugin bundles the whole site into one file on export and reverses the process on import, doing all the technical reconnection behind the scenes. For a beginner, this is about as close to one-click as WordPress migration gets.

So All-in-One WP Migration is the most beginner-friendly of the migration plugins, trading some of the granular control of Duplicator or a manual move for sheer simplicity. It is doing the same fundamental work — moving files and database, reconnecting, fixing URLs — but wraps it into an export-file-then-import-file flow that hides all the complexity. Understanding that the single export file ‘is your whole site’ makes the process completely intuitive.

Exporting your site to a file

On your existing site, install and activate All-in-One WP Migration, then use its Export feature. You choose to export to a file, and the plugin packages your entire site — all files, the complete database, plugins, themes, and uploads — into a single downloadable archive (with the plugin’s own file extension). You download this one file to your computer, and that file is a complete, portable copy of your whole site.

The export is a single, straightforward action — you click export, the plugin builds the file, and you download it. As with any migration, it helps to clean up your site first (remove unused plugins, themes, and old media) to keep the export file smaller, which matters especially because of the import size limit discussed below. But the export itself is simple and rarely problematic, since exporting is not where the size limit bites.

So exporting gives you one file that is your entire site. This file also serves as a complete backup, so creating it gives you a safety net as well as a migration bundle. With this single file downloaded, the move is already half done — all that remains is to import it on the new site, which is equally simple, with the one caveat about file size to be aware of before you do.

Preparing the new site and importing

On the new host, you first need a fresh WordPress installation — install WordPress on the new host (many hosts offer a one-click WordPress install), then install and activate the All-in-One WP Migration plugin on that fresh site, just as you did on the old one. This gives you a blank WordPress ready to receive your exported file.

Then use the plugin’s Import feature on the new site and select your exported file. The plugin uploads and unpacks it, replacing the fresh WordPress’s empty content with your entire exported site — all your files, database, content, and settings. It reconnects the database and updates the URLs automatically as part of the import, so when it finishes, your site exists fully on the new host.

So the import is as simple as the export: install fresh WordPress and the plugin on the new host, then import your file. This mirror-image simplicity — export a file, import a file — is the plugin’s whole appeal. The one thing that can interrupt this otherwise effortless flow is the import file-size limit, which is the single caveat every user of this plugin needs to understand, and which we turn to next.

How it handles database and URLs

The reason All-in-One WP Migration is so beginner-friendly is that it handles the two technical steps that trip up manual migrations — the database reconnection and the URL search-and-replace — entirely automatically, with no input needed from you. On import, the plugin sets up the database connection on the new site itself, so you never touch wp-config.php and never see a ‘database connection error’ from a mistyped credential.

For URLs, the plugin performs the search-and-replace as part of the import, detecting the site’s URLs and updating them for the new location, handling WordPress’s serialised data correctly. This means the classic post-migration problems — images loading from the old host, links pointing back to the old location — are handled for you without any manual search-and-replace step, which is exactly what makes the plugin feel effortless.

So the plugin’s automation covers precisely the parts a beginner would find hardest, and does them safely. You do not need to understand databases, wp-config, or serialised data; you export a file and import it, and the plugin does the delicate reconnection and URL-fixing behind the scenes. This is the trade-off of All-in-One WP Migration: maximum simplicity, with the technical work hidden — ideal for beginners, at the cost of the granular control a more hands-on tool or method offers.

The file-size limit to know about

The one thing every user of All-in-One WP Migration must understand is the import file-size limit. The free version limits the size of the file you can import (a cap that exists partly because it is tied to your host’s PHP upload limits), and if your exported site file exceeds that limit, the import simply will not proceed — this is the single most common stumbling block with the plugin.

• The limit is on import, not export: you can export any size, but importing a file above the free cap fails.
• Small sites are fine: a modest blog or brochure site usually falls well under the limit and imports without issue.
• Larger sites hit it: a site with a big media library or database can exceed the free cap.
• The fix: shrink the site first (remove unused media/plugins), raise the limit via the plugin’s paid extension, or use a different method for a very large site.

So before relying on this plugin, estimate your export file’s size against the free import limit. For most small sites it is a non-issue, which is why the plugin is so beloved by beginners. For a larger site, you either trim it down to fit, buy the paid extension that lifts the limit, or switch to a method without the cap (Duplicator’s paid tier, a server-side migration tool, or a manual move). Knowing this limit in advance saves you from the frustration of a stalled import — the plugin’s one and only significant catch.

Testing and going live

Once the import completes and your site is on the new host, test it privately before pointing your domain over. Because your domain still resolves to the old host, use a hosts-file preview or the new host’s temporary URL to view the migrated site, and click through it thoroughly: pages and posts, images, styling, internal links, forms, and logins. The plugin handles the reconnection and URLs, but you still verify the result before any visitor sees it.

When the migrated site is confirmed working, go live by updating your domain’s DNS to the new host (nameservers or A record), keeping the old host running through propagation so no visitor meets a gap. If you lowered your DNS TTL a day or two beforehand, the switch propagates quickly. Then re-verify on the live site, confirm email flows, and clear any caches so visitors see the fresh site.

Finally, once everything is stable and DNS has fully propagated — typically after a few days — retire the old host. So a migration with All-in-One WP Migration ends exactly as any migration does: test privately, cut over via DNS, verify, and retire the old host last. The plugin’s gift is making the copy-and-reconnect the simplest step imaginable — export one file, import one file — but the surrounding migration discipline of backing up, testing before cutover, and careful go-live remains yours. Within that discipline, and for a site under its size limit, it is the easiest WordPress migration there is.

FAQs

How do I migrate WordPress with All-in-One WP Migration?

On the old site, install the plugin and export your whole site to a single file, and download it. On the new host, install a fresh WordPress and the same plugin, then use Import and select that file — the plugin unpacks everything and reconnects the database and URLs automatically. Then test the migrated site privately, cut over DNS, verify, and retire the old host last. It’s export-one-file, import-one-file.

Does All-in-One WP Migration handle the database and URLs?

Yes, automatically — that’s its appeal. On import it sets up the database connection on the new site (so you never touch wp-config.php or see a connection error) and runs the URL search-and-replace as part of the import, handling WordPress’s serialised data correctly. The classic problems (images loading from the old host, links pointing back) are handled with no manual step from you.

What is the file-size limit in All-in-One WP Migration?

The free version caps the size of the file you can import (partly tied to your host’s PHP upload limits). It’s the plugin’s main catch: you can export any size, but importing a file above the free cap fails. Small sites usually fall well under it; larger sites can exceed it. The fix is to shrink the site, buy the paid extension that lifts the limit, or use a method without a cap.

Why won’t my All-in-One WP Migration import work?

Almost always the import file-size limit — if your exported site file exceeds the free version’s cap, the import won’t proceed. It’s the single most common stumbling block. Shrink the site first (remove unused media and plugins), raise the limit with the plugin’s paid extension, or switch to a method without a size cap like a manual migration for a very large site.

Do I need a fresh WordPress install on the new host to import?

Yes — install WordPress on the new host (many hosts offer a one-click install), then install and activate All-in-One WP Migration on that fresh site, and use Import to load your exported file. The import replaces the fresh WordPress’s empty content with your entire exported site, so you start from a blank WordPress and the plugin fills it with your site.

Is All-in-One WP Migration good for large sites?

It’s best for small to medium sites, where it’s arguably the easiest migration tool there is. For large sites, the free version’s import size limit becomes a real obstacle. You can raise the limit with its paid extension, but for very large sites a server-side migration tool, Duplicator’s paid tier, or a manual migration (which has no size limit) may be more reliable. Match the tool to your site’s size.

The bottom line

All-in-One WP Migration is the simplest WordPress migration tool there is, built on a mirror-image model: export your entire site — files, database, plugins, themes, and media — to a single file on the old site, then import that one file on a fresh WordPress install on the new host, and the plugin rebuilds everything, reconnecting the database and fixing the URLs automatically. It handles precisely the technical steps that trip up manual migrations — the database connection (so you never touch wp-config.php or meet a connection error) and the URL search-and-replace (handling serialised data safely) — entirely behind the scenes, with no input from you. That is what makes it so beloved by beginners: it hides all the complexity behind export-one-file, import-one-file.

Its one significant catch is the import file-size limit in the free version, which is the most common reason a migration with it stalls: you can export any size, but importing a file above the free cap fails. Small sites sail under it; larger sites hit it, and the fix is to shrink the site, buy the paid extension that lifts the limit, or switch to a method without a cap for a very large site. Beyond that, the plugin automates only the copy-and-reconnect; the surrounding discipline is still yours: the export doubles as a backup, but test the migrated site privately before pointing your domain over, cut over by updating DNS while keeping the old host alive through propagation, re-verify the live site and email, and retire the old host only after a few stable days. For any site under its size limit, All-in-One WP Migration makes the move as effortless as WordPress migration gets.

When you are ready, you can start with Hostinger and use code PROTIPS for the reader discount. All-in-One WP Migration is the simplest tool: export your whole site to one file on the old site, import it on a fresh WordPress on the new host, and it reconnects the database and fixes URLs automatically. Its one catch is the free version’s import file-size limit — small sites are fine, larger ones hit it (shrink the site, buy the extension, or use another method). Test privately, cut over DNS, verify, retire the old host last.