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You can move a website without taking it offline by copying it to the new host first and changing public DNS only after the copy passes private testing. Keep the old account serving visitors, lower the web-record TTL 24–48 hours before cutover, synchronize the final database changes for dynamic sites, then switch only the A, AAAA or CNAME records. Leave the old host running while DNS caches expire and keep a tested rollback ready.
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What “without downtime” really means
A hosting transfer does not instantly move every visitor from one server to another. Recursive DNS resolvers cache the old address until its TTL expires, so some visitors may reach the old host while others reach the new one. The safest design is therefore overlap: both copies work during propagation, and neither server is taken offline during the switch.
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There is no universal guarantee that every resolver will update at the same moment. A migration is operationally successful when the old site continues serving requests, the new copy is tested before exposure, writes are synchronized, and you can revert DNS quickly if a critical fault appears.
Migration timeline at a glance
| Stage | When | Purpose |
|---|---|---|
| Inventory and backup | Before provisioning | Record the stack and create a verified rollback copy. |
| Provision destination | Several days before cutover | Build the account, runtime, database, SSL and application settings without changing public DNS. |
| Lower web DNS TTL | Ideally 24–48 hours before cutover | Encourage resolvers to discard the old web address sooner. |
| Copy and test | Before cutover | Transfer files and database, then test through a hosts-file mapping or private preview. |
| Final synchronization | Immediately before DNS change | Capture orders, comments, uploads and other writes made since the first copy. |
| DNS switch and monitoring | After tests pass | Change only web records, watch both versions and validate from multiple networks. |
| Retirement | After a safety period | Archive the old account and cancel it only after traffic, mail and integrations are stable. |
1. Inventory everything before touching DNS
Make a written inventory of the current environment. This prevents a technically correct file copy from omitting a dependency that visitors or administrators rely on.
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- List every domain, subdomain, parked domain and alias, including both the apex name and
wwwhostname. - Record the PHP or other runtime version, database engine and version, required extensions, web-server rules and document root.
- Document cron jobs, scheduled workers, queue consumers and any server-side scripts that run outside normal page requests.
- Export the current DNS zone or copy each record into a change sheet. Separate web records (A, AAAA and CNAME) from mail records (MX, SPF, DKIM and DMARC), verification TXT records and service-specific entries.
- Note the active TLS certificates, HTTP-to-HTTPS redirects, HSTS behavior, CDN settings, cache rules and firewall allowlists.
- List plugins, themes, custom code, external APIs, payment callbacks, webhooks, analytics, search tools, contact forms and transactional email providers.
- Confirm that you can access the registrar, DNS provider, old host, new host, database and backup storage before scheduling the move.
Take screenshots or save configuration exports where a setting is difficult to reproduce. The inventory becomes your acceptance checklist after the cutover.
2. Create and verify a rollback backup
Download the complete site, not only the public pages. For a WordPress installation this includes the WordPress directory, uploads and images, plugins, themes, configuration files and a full database export. Other applications need the equivalent source files, user uploads, environment configuration and database dump.
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- Verify that the archive opens, that the database dump can be read, and that important uploads are present. A backup that has never been tested is not a rollback plan.
- Record the database name, user, password, host and table prefix separately so you can rebuild the application if the destination fails.
- Keep the pre-migration backup unchanged. Create a second archive after the final synchronization if the site receives ongoing writes.
Do not cancel the old plan or delete its files as part of the first transfer. The old, known-good copy is your fastest recovery option.
3. Provision the new host without changing public DNS
Create the destination account and configure its web root, database, database user, runtime version, required extensions, rewrite rules, file permissions, caching and SSL. Use a temporary provider address or private preview while the real domain still points to the old server. UpdraftPlus migration guidance likewise recommends setting up the new hosting space before changing DNS.
Match versions deliberately. A newer PHP release, changed database collation, missing image library or different rewrite module can break an application even when every file copied correctly. If you must change versions, test that change separately from the hosting move whenever possible.
Issue or validate the TLS certificate on the new host before cutover. Prepare certificates for both the apex domain and www if both are used. Confirm that the certificate chain, HTTPS redirect and any HSTS policy behave correctly on the private copy.
4. Lower the DNS TTL before the move
TTL is the period a recursive resolver may retain a DNS answer. Lower the TTL for the web A, AAAA or CNAME records at least 24–48 hours before the planned switch so caches can learn the shorter value while the old server is still live.
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| Value or timing | How to use it | Qualification |
|---|---|---|
| 300 seconds | A common temporary target for the web records during migration. | HostPanel migration guidance, 2026. |
| 86,400 seconds | An example of a 24-hour default TTL that may delay a cutover. | SiteGround Academy guidance, 2026. |
| 24–48 hours ahead | Time to allow resolvers to refresh after lowering the TTL. | Use this window when the DNS provider and schedule allow it. |
Lower the TTL only for records you intend to switch. Leave mail and unrelated service records alone unless they are deliberately moving. After the migration is stable, restore a production-appropriate TTL; keeping an unusually short value increases DNS query traffic and does not improve application performance.
5. Transfer the files and database
Choose a method that matches the site’s risk and your ability to verify it. Copy uploads and configuration as well as application code, preserve permissions, and recreate scheduled tasks on the destination.
| Method | Best fit | Strengths | Risks or checks |
|---|---|---|---|
| Manual files plus database export | Administrators comfortable with SFTP, rsync and SQL. | Maximum control over exactly what is copied and when. | Requires careful permissions, configuration, database import and final-sync work. |
| Migration or backup plugin | Typical WordPress sites. | Packages files and database and can simplify restore-based moves. | Check storage limits, serialized data handling, plugin compatibility and private testing. |
| Managed migration | High-write stores, multisite networks, fragile legacy systems or owners without a verified backup. | Specialist help with consistency, DNS and rollback. | Confirm exactly what the service covers, including email, DNS records, integrations and the final synchronization. |
For a manual move, export the database from the old host, upload the files by SFTP or rsync, import the dump into the new database, and set ownership and permissions appropriate to the new web server. Do not copy transient cache directories as if they were authoritative content unless the application requires them.
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1Fix the driver behind crashes, sound loss and screen glitches2Repair Windows errors before they cause bigger problems3Scan for outdated or missing drivers - takes under a minuteIf the public domain and paths remain identical, keep the application’s public URL settings unchanged. In WordPress, that generally means copying the files and database and changing only the database credentials in wp-config.php when the destination uses different values.
6. WordPress-specific decisions
When the domain and URLs stay the same
WordPress documentation states that a move to another server does not require reinstalling WordPress. When the database and URL remain the same, copy the files and database, then update the database host, name, user and password in wp-config.php if necessary. Leave the home and siteurl values unchanged; a server change alone is not a reason to run a broad search-and-replace.
When the domain or path changes
Update the WordPress URL settings and use a search-and-replace method that understands serialized data. A naïve text replacement can change string lengths inside serialized values and corrupt options, widget settings or metadata. Take a database backup immediately before any URL rewrite and test the replacement on the private copy.
Permalinks and scheduled work
Confirm that the destination has the correct rewrite rules. After the move, open the WordPress Permalinks settings and save them if the server’s rewrite configuration differs, then test representative posts, pages, feeds and attachment URLs. Recreate cron jobs and check whether the site uses real server cron or WordPress’s request-triggered scheduling.
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7. Test the new copy privately
Never make the new server public for the first time by changing DNS. Map the real hostname to the new server’s IP in a local hosts file, or use the provider’s private preview. This lets you test the production hostname, certificate and redirects while ordinary visitors still reach the old host.
- Find the destination server IP and the exact hostname you intend to test.
- Add a temporary hosts-file entry that maps that hostname to the new IP. On Windows the file is typically
C:WindowsSystem32driversetchosts; on macOS and Linux it is typically/etc/hosts. - Open the site in a private browser window and test the apex and
wwwnames, using HTTPS. - Remove the temporary entry after testing, or keep it only while performing the final verification. Do not leave a stale override in place when diagnosing post-cutover DNS.
Run a written acceptance test rather than checking only the home page:
- Open representative posts, pages, category archives, media files, feeds and search results.
- Sign in to the administration area, create a test draft and confirm that permissions and uploads work.
- Submit contact forms, newsletter forms, login flows, checkout and other conversion paths in a safe test mode.
- Check redirects, canonical URLs, robots directives, sitemap generation, HTTPS, mixed-content warnings and error logs.
- Trigger a scheduled task, webhook and external API callback where possible, and verify that firewall or allowlist rules permit the new IP.
- Confirm analytics, search-console verification and transactional email behavior without changing the live DNS records.
8. Synchronize writes on dynamic sites
A static brochure site can often tolerate a simple final copy. A store, forum, membership site, booking system or comment-enabled publication cannot: orders, comments, registrations and uploads may arrive while the initial database is being exported.
Choose one of two controls before cutover. Either schedule a brief maintenance window that prevents writes while you take the final export, or use a migration process that synchronizes changes from the old database to the new one. Announce the window to staff, stop background workers that could create new records, complete the final database import, and verify the newest transaction or comment on the destination before switching DNS.
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Keep the old site available for reads during propagation, but do not allow two independent application copies to accept writes indefinitely. If both servers process orders or account changes, reconciling divergent data becomes substantially harder than a short, planned write freeze.
9. Change only the web DNS records
After private tests pass and the final synchronization is complete, edit the DNS zone. Change the A and/or AAAA records, or the web CNAME, to the new provider. Do not replace the entire zone with a template from the new host unless you have compared every record.
MX, SPF, DKIM, DMARC, verification TXT records and unrelated service records may still belong to your existing mail or third-party providers. A careless DNS change can leave the website working while mail delivery fails silently. Copy those records exactly when they are staying in place, and move them separately only when you have a deliberate email migration plan.
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Record the old values before saving the change. That gives you a precise rollback instruction instead of relying on memory during an incident.
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Some visitors will continue reaching the old server until their resolver’s cached answer expires. Check the domain from more than one network, such as a mobile connection and a separate broadband connection, and inspect DNS answers from multiple geographic locations if available.
- Watch uptime checks, web-server access logs, application logs and error rates on both hosts.
- Submit forms and test a real transaction path in a controlled manner. Confirm that email arrives and that callbacks or webhooks are acknowledged.
- Check certificate validity, redirect chains, CDN behavior, cache headers and HSTS on both apex and
wwwhostnames. - Compare analytics and search-console signals for missing traffic, indexing errors or a sudden increase in server errors.
- Confirm that backups now run on the new host and that scheduled jobs execute at the expected times.
Do not interpret the first successful browser test as complete propagation. Continue monitoring while cached DNS entries age out.
11. Keep a rollback path
Leave the old hosting account active during propagation and for a safety period after the switch. Namecheap recommends keeping the old plan for at least three days. The exact period should reflect your traffic, publishing schedule, transaction volume and contractual renewal date.
If a critical fault appears, restore the recorded A, AAAA or CNAME values for the old server. Keep the new copy intact while diagnosing the problem, and avoid making unrelated changes during the incident. For a dynamic site, decide what happens to writes received on either host during rollback; a DNS reversal does not merge databases automatically.
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12. Close the old account only after confirmation
When traffic, email, integrations, backups, SSL renewal and monitoring are stable, take a final archive of the migrated site and its configuration. Check that you have exported any logs or invoices needed for compliance, and document the new DNS values and administrator credentials in your normal secure system.
Only then cancel the old hosting account. Removing it earlier destroys your easiest rollback and can turn a recoverable configuration mistake into an outage.
Troubleshooting the most common transfer failures
The new site shows a database connection error
Recheck the destination database host, name, user, password and permissions in the application configuration. Confirm that the database import completed and that the destination runtime can reach the database server. Do not change public DNS again until the private copy loads reliably.
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Pages work but pretty URLs return 404
Compare rewrite rules and web-server modules with the old host. For WordPress, save the Permalinks settings after confirming the destination rewrite configuration. Test both a post URL and an administrative request before cutover.
Visitors see mixed content or certificate warnings
Validate certificates for every hostname, check HTTP-to-HTTPS redirects and inspect hard-coded asset URLs. If a CDN or proxy terminates TLS, verify its origin certificate and the new origin IP as well.
Email stopped after the website move
Compare MX, SPF, DKIM, DMARC and verification TXT records with the pre-migration export. Restore the mail records if they were overwritten, and test both inbound and outbound delivery. Website DNS and email DNS are related but are not the same migration.
Only some users report the old site
This is normally DNS propagation, not proof that the new server is broken. Check both hosts’ logs, verify the reduced TTL was published before the switch, and continue monitoring until cached answers expire. Keep the old server available during this period.
Choosing the safest approach for your site
Manual transfer is appropriate when you understand SFTP or rsync, SQL exports, permissions and DNS. A WordPress migration plugin reduces repetitive work for a conventional installation, but you still need a verified backup, private testing and a plan for serialized data and dynamic writes. Managed assistance is sensible for high-write commerce, multisite networks, legacy applications or any migration where you cannot independently restore the backup.
Whichever method you select, judge it by five practical questions: Can it preserve data during the final sync? Can you test under the real hostname before DNS changes? Does it provide a clear rollback? Does it handle application-specific data such as serialized WordPress values? Does someone own the DNS, email and third-party integration checks? The method is less important than maintaining the copy-first, switch-last sequence.
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