How to Transfer a Browser Game Save to Another Device Safely
Identify whether progress uses an account, export code, save file or local browser storage, then use the supported path and verify it before wiping the old device.
There is no universal browser-game save folder. One title may sync through an account, another may offer a text export code, and a third may keep progress only in the original browser’s local storage. The correct transfer method is determined by the game, not just by Chrome, Firefox, Safari or Edge.
Keep the original device and browser profile unchanged throughout the move. Do not clear history, cookies, site data or the old profile until the new device shows the correct progress and can save a new checkpoint.
Identify the save type
| What the game offers | Likely save type | Best transfer route |
|---|---|---|
| Username, email or provider sign-in | Account or cloud save | Sign into the same game account on the new device and confirm the sync direction |
| Export/Import, recovery code or long text string | Portable save code | Export on the old device, store securely, then import on the new one |
| Download Save / Upload Save | Portable save file | Download the official file and import it through the game’s own menu |
| Progress survives browser restarts but no account exists | Local storage or IndexedDB | Look for an official export; otherwise a supported transfer may not exist |
| Progress disappears when the private tab closes | Temporary private-session storage | It is normally not recoverable after the session ends |
| Progress follows one portal but not another | Origin-specific local save or portal account | Use the same exact portal and game account on the new device |
Safest transfer order
- Open the original save. Record the level, currency, inventory and date so you can verify the result.
- Reach a stable checkpoint. Return to the menu and wait for any save or sync indicator to finish.
- Find the game’s supported method. Check Settings, Account, Save, Cloud, Export, Import, Backup or Recovery.
- Make two safe copies when possible. Keep an export in two private locations that you control; do not post a save or recovery code publicly.
- Open the same exact game page on the new device. Match the portal, account and game version.
- Import or sign in once. If asked which save to keep, compare progress and timestamps carefully before choosing.
- Verify before continuing. Confirm several distinctive details, complete a small action, save again and reload the new device once.
- Preserve the old device. Keep it unchanged until the new save has survived at least one normal restart.
Account or cloud-save transfer
Use the game’s own account, not merely the browser account. Being signed into Chrome, Firefox, Safari/iCloud or Microsoft does not prove the game progress itself is synced. On the old device, check the in-game account name and wait for a cloud or save indicator. On the new device, sign into that same game account through the normal game interface.
If both devices have different progress, stop playing until you understand the conflict prompt. “Local” usually refers to the device in front of you, while “cloud” refers to the server copy, but games phrase this differently. Compare level and last-played time, and avoid repeatedly opening both versions because each may overwrite the other.
Export code or save-file transfer
An official export is ideal for a game without accounts. Treat the code or file as private: it may contain all progress and, in some games, identifying information. Store it in a password-protected account or on removable storage you control. Do not paste it into an online “converter.”
| Checkpoint | What to verify | Failure response |
|---|---|---|
| After export | File is non-empty or code is complete | Export again before closing the old game |
| Before import | New device is on the same title and expected version | Return to the original portal/game page |
| After import | Level, items and currency match | Do not overwrite the old save; retry from the original export |
| After one reload | Imported save persists and accepts a new checkpoint | Check storage permissions and normal browsing mode |
Why local-only saves are difficult to move
The Web Storage API gives each origin its own local storage, while IndexedDB can hold larger structured data. Both are designed for websites to use inside the browser, not as a universal user-facing save folder. An embedded game can store data under the game host’s origin, separate from the portal in the address bar.
For background, see MDN’s explanations of Web Storage and IndexedDB. Their same-origin boundaries are why copying a browser profile, switching portals or turning on bookmark sync does not guarantee a transferable game save.
A full operating-system profile migration may carry browser data in some cases, but it is not a game-level guarantee and is too broad to recommend as a simple save transfer. Keep the original profile, ask the game developer for an export method and avoid editing database files or developer-tool values by hand.
What not to do
- Do not clear cookies or site data on the old device before verification.
- Do not assume browser sync includes localStorage or IndexedDB game progress.
- Do not copy authentication tokens, unknown storage keys or whole developer-tool dumps.
- Do not upload a save to a third-party converter or public forum.
- Do not overwrite a more advanced cloud save without checking level and timestamp.
- Do not delete the old browser profile just because the new device loaded the title screen once.
If the new device starts at level one
- Confirm the exact portal URL and game title match the old device.
- Confirm normal browsing mode, not a private window or guest profile.
- Check the in-game account identity rather than only the browser identity.
- Look for an import or cloud-restore command instead of starting a new run.
- Return to the old device and verify that its save remains intact.
- If no supported method exists, contact the game developer or portal with the game name and platform details.
If even the old device no longer keeps progress, follow the progress-not-saving guide. If you are considering cleanup, use the cache-only guide first.
A simple verification record
Before and after the move, write down five details: level, currency, one rare item, settings profile and last checkpoint. This makes a partial or stale transfer easy to spot. Keep the export date and the device name beside any backup file, but never place passwords or account recovery answers in the filename.
Related browser game help
- Fix local progress that will not persist
- Clear cache without selecting site data
- Protect a live session from tab reloads
- Set up browser games on iPhone and iPad
Return to the browser game troubleshooting hub for the complete guide library.
Browser game save transfer FAQ
Can every browser game save be transferred to another device?
No. Accounts, cloud sync, export codes and official save files can often move progress. A local-only save tied to one browser origin may have no supported transfer method.
Will browser sync copy HTML5 game progress?
Do not assume it will. Browser sync commonly handles bookmarks, passwords and settings, but game local storage and IndexedDB may remain on the original profile and device unless the game provides its own sync.
Should I copy localStorage values with developer tools?
That is fragile and can expose tokens, corrupt a save or violate a game’s intended flow. Prefer the game’s account, export code, save file or support channel, and keep the old device unchanged until the new save is verified.