Manual method
- On the main phone, open a conversation’s menu and settings.
- Choose Export chat history, then save the text file to a private folder.
- On Windows/Mac, the chat menu’s Save chat option preserves the messages currently displayed; load and check the desired range.
- Repeat per conversation and save important available attachments separately.
What you get: LINE documents text-file export but says it cannot restore chat history into LINE. Desktop export only saves messages currently appearing in the chat. A restorable LINE backup is a separate process; do not treat a text transcript as a complete media-inclusive backup. Provider instructions.
Size and waiting time
Planning example: 0.05 GB; light/heavy scenarios: 0.001–0.5 GB. These are estimates, not a measured population average or fixed limits. Many exported text conversations with no media payload. Separately saved photos/video could add 1–50+ GB.
Preparation: No preparation queue for local text export. Allow minutes per conversation as a planning estimate; manual repetition dominates small downloads.
Network transfer of 0.05 GB: about 57 sec at 10 Mbps, 11 sec at 50 Mbps, or 6 sec at 100 Mbps. This assumes 70% sustained throughput and excludes preparation, manual work and extraction. For local exports, this is a comparison for transferring the saved files online; disk speed determines local copy time. Online backups use your upload speed. Transfer calculations and large-file examples.
Store and check your archive
An encrypted folder on your computer is suitable for this small report; keep a second copy on an external drive. Allow roughly 0.15 GB of working space for the example, including an original, an extracted working copy and room to check it. Very compressed packages can need more. A USB key is useful for a spare copy, but should not be the only one. An encrypted online copy protects against losing the local devices.
Keep the original in line/YYYY-MM-DD/original/. Record the account alias, selected scope, date range and missing items. Open old and recent records and sample attachments offline, then compare file sizes or checksums after copying. Keep the source account until you have checked the result. Storage and recovery instructions.
Sources and review
Public documentation was reviewed on 27 October 2026. No signed-in export or restoration was performed. Account options and availability can change; follow the current provider instructions.