In Taiwan, Japan, and Thailand, LINE is the dominant messaging app. But many users notice that photos sent through LINE arrive noticeably blurry or at a lower resolution than the original. This article explains LINE’s image compression behavior in detail and walks through every method for sending photos at full quality.
Why LINE Compresses Photos
LINE automatically compresses images during transmission for several reasons:
- Bandwidth costs: With over 200 million active users globally exchanging messages and photos, LINE compresses images to significantly reduce server and bandwidth expenses.
- Faster delivery: Compressed images transfer faster, ensuring smooth delivery even on 3G connections or in areas with weak signals — important for LINE’s user base in regions with varying network quality.
- Recipient storage: Compressed photos take up less space on recipients’ devices, particularly important for users with lower-capacity phones.
In practice, LINE’s standard compression mode scales images down to approximately 1024 px on the longest side and applies JPEG compression. A 12 MP photo (5–10 MB) may be reduced to just 150–300 KB — a visible quality drop that becomes especially obvious when zoomed in or printed.
Solution 1: Send at Original Quality (Most Effective)
LINE offers an “Original Quality” sending option that preserves full resolution. The option exists but isn’t enabled by default.
On iPhone:
- Open LINE and navigate to the conversation
- Tap the photo/image icon in the input bar
- Select the photo(s) you want to send
- Before sending, look for an “Original” or “Original Quality” toggle in the upper right area of the selection screen
- Enable it, then tap Send
On Android:
- Open LINE and navigate to the conversation
- Tap “+” → Photo
- Select your photo(s)
- Find the “Send in Original Quality” option (location varies by LINE version — check the preview screen or the upper right area)
- Enable it and send
Important notes: Photos sent at original quality count against LINE’s server storage allocation. Additionally, photos in standard chat (not in Albums) have a 30-day download availability window — after this period, they may no longer be downloadable. Save important photos to your device promptly.
Solution 2: Use LINE Albums
LINE’s Album feature is the better option for preserving high-quality photos that need to remain accessible long-term:
- Album photos remain available longer than standard chat photos (not subject to the 30-day expiry)
- Image quality in Albums is generally higher than in standard chat messages
- Access: Open a group or individual chat → Tap the menu (top right) → “Album” → Create a new album or upload to an existing one
- All participants can browse and download album photos at any time
- Ideal for travel photos, event documentation, or any collection that needs long-term access
Solution 3: Share via LINE Keep
LINE Keep is LINE’s built-in cloud storage feature (1 GB free). It can serve as a workaround for sharing full-quality files:
- Save the high-resolution photo to LINE Keep
- Share the Keep item with your contact — they can download the original file
- Keep supports multiple file formats and isn’t limited to LINE’s photo compression behavior
Android vs. iOS Differences
- Original Quality button location: On iOS, the toggle typically appears after selecting photos, before sending. On Android, the button location varies by LINE version — sometimes in the upper right of the preview screen, sometimes accessible via a settings icon.
- In-app camera: Photos taken directly within LINE (using LINE’s built-in camera) are compressed more aggressively than photos selected from your gallery. For best quality, always take photos with your native camera app first, then select from your gallery and send at Original Quality.
- File size limit: Standard (compressed) chat images have no size limit. Original quality images are typically limited to 10 MB — images exceeding this are automatically compressed regardless of the setting.
- Animated GIFs: LINE supports GIF transmission but compresses large files. For animations, LINE’s own sticker system generally delivers better quality than GIF.
Troubleshooting Downloaded Image Quality
Sometimes the issue isn’t with transmission but with how images are saved or viewed:
- How you save the image matters: Long-pressing a LINE image and tapping “Save” stores the image at its transmitted resolution. Taking a screenshot stores only the screen resolution version (which may be lower than the actual transmitted image quality).
- 30-day expiry: Standard chat images become unavailable for download 30 days after they’re sent. If you see “This image has expired,” the file can no longer be retrieved from LINE’s servers — save images promptly to avoid this.
- Older messages: Very old LINE messages may have been transmitted under older compression settings that were more aggressive. High-quality versions of these images may simply no longer be available.
Image Quality in Group Chats
The same compression rules and solutions apply in LINE group chats:
- Standard group photo messages are compressed equally
- The Original Quality option works in group chats just as in individual chats
- Group Albums are the best way to maintain a long-term collection of high-quality photos accessible to all members
- All group members can browse and download from group albums at any time
Frequently Asked Questions
Q: I sent at Original Quality but the recipient says it still looks blurry. Why?
A: Several possible causes: (1) the recipient is viewing the thumbnail rather than the full-size image — ask them to tap and open the full image; (2) the original photo itself had limited resolution; (3) the file exceeded the 10 MB limit and was automatically downgraded. Ask the recipient to confirm they’re viewing the full-size version, not just a preview.
Q: If someone forwards a LINE photo to a third party, does it get compressed again?
A: Yes — forwarding a compressed LINE image through LINE will apply another round of compression, further degrading quality. The best practice is to request the original photo directly from the person who took it, then share at Original Quality.
Q: Is shooting directly in LINE’s camera better or worse for quality?
A: Worse. LINE’s built-in camera applies more compression than selecting from your photo gallery. Always shoot with your native camera app, then select the photo from your gallery and send at Original Quality for the best results.
Conclusion
LINE’s image compression exists to balance speed and bandwidth costs across its massive global user base, but the platform does provide options for those who need full-quality photo sharing. For photos where detail matters — documents, design work, professional photography — always use the Original Quality sending option. For photos that need to remain accessible long-term, LINE Albums is the better choice. Understanding these features puts the quality control back in your hands.
Do it in your browser — the file never leaves your device: Image Tools
