Schedule Instagram feed posts, carousels, and Reels. With the hashtag block in the first comment.
Instagram is where most of the fiddly work lives: media has to be the right shape, carousels have to be cut correctly, and a caption ending in thirty hashtags reads badly. Postonus schedules the post and queues the first comment, and the free tools handle the cutting.
Feed, carousels, and Reels.
The caption and the hashtags
An Instagram caption doing two jobs at once — saying something, and carrying thirty hashtags — does neither well. The tags push the actual words out of the preview, and the whole thing reads like output rather than writing.
Instagram supports a first comment, so the tags go one comment down. They still work. The caption stays readable. Postonus queues the comment with the post so this does not require you to be holding your phone at the publish time.
Carousels and grids
Two different jobs that both involve cutting an image up, and there is a free tool for each:
- Carousel splitter — one wide image becomes seamless swipeable slides.
- Grid generator — one image becomes a 3x1, 3x2, or 3x3 set that lines up as a feed layout.
Both run entirely in your browser. Nothing is uploaded, which also means no watermark and no account needed. See the free tools.
Professional accounts only
Instagram's publishing API is restricted to business and creator accounts. That is a platform rule, not ours — no scheduling tool can publish to a personal Instagram account. Switching account type is free and takes a moment in Instagram's settings.
The limits above are rendered from the same rules the publisher enforces. If a media type or count is not listed, the post will not publish with it, and the composer will tell you before you schedule rather than after.
Reels
Video posts schedule like any other and publish automatically. Worth pairing with posting windows — Instagram's strongest slots are consistently late morning on weekdays, and the composer will drop a post into the next one.
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Limits
What Instagram allows in one post. The composer enforces these while you type.
- Characters per post
- 2,200
- Media per post
- 10
- Media types
- image, video
- First comment
- Supported — up to 2,200 characters
Read from the same rules the composer and the publish workers use, so this table cannot drift from what actually publishes.
Questions
Frequently asked questions Everything the first evaluation usually needs.
- Can I schedule Reels as well as feed posts?
Yes. Video posts are scheduled the same way as images, and publish automatically at the scheduled time through Instagram’s official API — no phone notification to act on.
- Can I put my hashtags in the first comment?
Yes, and this is the main reason to use it. Instagram supports a first comment and Postonus publishes it with the post, so a clean caption and a full tag block are not mutually exclusive.
- How do I schedule a carousel?
Attach several images to one post — the table above shows how many a post can carry. If you are cutting one wide image into slides, the free carousel splitter does that in your browser without uploading anything.
- Do I need a business or creator account?
Instagram’s publishing API is only available for professional accounts, so a personal account cannot be scheduled to by any tool. Switching is free in Instagram’s settings.
- Will my images be resized correctly?
The free image resizer exports an image at the recommended dimensions for each placement, and the composer validates media counts and types against the platform before you schedule.
Keep reading
- Bulk schedulingUpload up to 50 posts at once from a CSV or a folder of media, stagger them automatically at a fixed interval, then review each row before it is scheduled.Read
- First commentQueue the first comment with the post itself, so links and hashtags land in the comments instead of the caption — on the platforms that support it.Read
- Threads schedulerSchedule Threads posts with a first comment queued alongside, so links land under the post instead of crowding the 500-character caption meant for your idea.Read