Post your own photos & videos

Besides carousels made in Posto, you can post photos, videos, or a mixed carousel you upload yourself to Instagram, Facebook, Threads, and TikTok. Posting and uploading use no AI credits; files count toward your plan's storage.

Creating a post

1. Click + Create → Upload & post, or Upload content on the Calendar page.
2. Drag photos/videos into the upload box, click Choose files, or From uploads to reuse files you uploaded before.
3. Set the order by dragging or with the arrow buttons. One item = a single photo/video; two or more = a carousel.
4. Choose accounts. Accounts that can't take this content can't be selected; the reason and how to change it appear below the account list.
5. Write a caption (the same for all, or switch on Different per platform).
6. Pick a date & time and click Schedule, or Post now. Status, post links, and Try again are on the Calendar page, just like carousels.

Accepted files

• Photos: JPG, PNG, WebP, or HEIC, up to 20 MB. All are stored as JPG.
• Videos: MP4 or MOV with H.264/HEVC video and AAC audio (or no audio), up to 1080p (longest side 1920 px) and 60 fps, ratio between 9:16 and 16:9.
• Video limits per plan: Free 50 MB & 60 seconds; Starter and Pro 200 MB & 3 minutes; Ultimate and Agency 300 MB & 5 minutes. Videos inside a carousel can be up to 30 seconds (Free) or 60 seconds (paid plans) per item.
• Videos are not re-encoded, so the quality stays the same as the original. MOV files only get their container changed to MP4. HDR videos are posted as is; colors may look slightly different in some apps.

If a file is rejected

The message under the item names the cause and how to fix it. The most common ones:

• 4K/2K: export again in 1080p. On iPhone: Settings › Camera › Record Video › 1080p.
• AVI, MKV, WebM, FLV, WMV, or 3GP: export again as MP4 (H.264 + AAC) from your video editor.
• ProRes, VP8, VP9, AV1, or old MPEG-4 codec: export again with H.264.
• Audio that isn't AAC: export again with AAC audio or no audio.
• HEIC photo can't be processed: convert it to JPG (iPhone: Settings › Camera › Formats › Most Compatible).

Platform rules

• Instagram: photos 4:5 to 1.91:1, one video (Reels), or a carousel of up to 10 mixed photos/videos.
• Facebook: up to 10 photos, or one 9:16 video (Reels, 3–90 seconds). Photos and a video can't be combined in one post.
• Threads: carousel of up to 20 mixed photos/videos; videos up to 5 minutes.
• TikTok: up to 35 photos (photo mode) or one video within your account's length limit. Photos and a video can't be combined.

A mixed photo + video post can go to Instagram and Threads at once; for Facebook and TikTok, create a separate post (photos only or a single video).

Editing a video

Click the scissors icon on a video to:

• Trim the start and end. Because nothing is re-encoded, a clip can only start at the nearest keyframe; the actual start time is shown.
• Cover: play the video and click Use this frame as cover (used by Instagram and TikTok).
• Mute sound if the video should be posted without audio.

Still stuck? Contact [email protected].