Short answer: Messages stores every photo, video and voice note anyone has sent you, so it can grow to tens of gigabytes. Open Settings › General › iPhone Storage › Messages and use Review Large Attachments to delete the biggest files without deleting the conversations. Then set Settings › Apps › Messages › Keep Messages to 1 Year so old threads clear themselves.
Steps
- Open Settings › General › iPhone Storage and tap Messages. The screen shows how much space photos, videos, GIFs and other attachments take.
- Tap Review Large Attachments. Swipe left on an item to delete it, or tap Edit, select several and tap the trash icon.
- Check Top Conversations on the same screen to find the threads that take the most space, and clean those up in the Messages app.
- In a conversation, tap the contact's name at the top and scroll to Photos and Documents. Touch and hold an item to delete it, or tap See All to select several.
- Set Settings › Apps › Messages › Keep Messages to 30 Days or 1 Year (on iOS 17 and earlier, Settings › Messages). Older messages and their attachments are deleted.
- Under Settings › Apps › Messages › Audio Messages, set Expire to After 2 Minutes if you don't need to keep voice notes.
- Turn on Low Quality Image Mode in the same settings if you're often on a limited data plan.
What takes the space in Messages
| Item | Typical size | Fix |
|---|---|---|
| Videos | 10–300 MB each | Review Large Attachments |
| Photos | 1–5 MB each | Delete from the conversation's Photos section |
| Voice notes | under 1 MB a minute | Expire after 2 minutes |
| GIFs and stickers | small, but thousands add up | Delete per conversation |
| Text only | tiny | Not worth cleaning |
Messages in iCloud
With Settings › [your name] › iCloud › Messages in iCloud on, your messages and attachments are stored in iCloud and synced across your devices. That uses iCloud storage, and deleting a message or conversation deletes it on every device. It's convenient, but it doesn't make Messages small on the iPhone by itself; cleaning attachments is still the way to free space.
Photos you saved from Messages
Photos and videos you saved from a conversation are separate copies in your Photos library. Deleting the conversation doesn't remove them, and deleting them from Photos doesn't shrink Messages.
Where Spaceclear fits
iOS doesn't let any app read your messages, so Spaceclear can't clean Messages; use the steps above. Spaceclear cleans the Photos library, including the copies you saved from chats: exact duplicates, similar images (best kept), screenshots and big videos. See find the biggest videos, and for chat apps, WhatsApp storage.
FAQ
Do text messages take up storage on iPhone?
Text itself is tiny: even years of texts are usually under 1 GB. The space is taken by the photos, videos and voice notes inside conversations, which is why Review Large Attachments frees so much.
Will deleting attachments delete my messages?
No. Deleting an attachment removes only that photo, video or file; the text of the conversation stays. Deleting a whole conversation removes everything in it.
Why is Messages still big after deleting conversations?
iPhone Storage can take a while to recalculate, and recently deleted messages may be kept for up to 30 days in Messages › Edit › Show Recently Deleted (or Filters › Recently Deleted). Delete them there, restart and check again.
Updated 2026-11-13