What 1Post checks for Instagram
| Rule | What 1Post checks |
|---|---|
| Text limit | 2,200 characters, counted by code points |
| Media accepted | Images, Video |
| Images per post | 10 |
| Videos per post | 10 |
| Image formats | JPEG; PNG, WEBP are converted to JPEG |
| Image shape | 4:5 to 1.91:1 |
| Carousel | 2 to 10 items |
| Threads | No |
| First comment | Yes, up to 2,200 characters |
| Posts per day, per connected account (1Post) | 50 |
These are the limits 1Post applies in the composer, so a post that passes is not refused for them when it is sent. A network can still refuse a post for reasons outside these rules, such as its content policies.
What Instagram publishes
| Fact | Source |
|---|---|
| JPEG is the only image format supported, and shopping tags and filters are not supported when publishing through the API. | Instagram Platform: content publishing, read 2026-10-22 |
| A carousel can hold up to 20 images, videos or a mix, and counts as one post against the publishing limit. | Instagram Platform: content publishing, read 2026-10-22 |
| The publishing limit is stated as 100 posts in a 24-hour moving period in one place and as 50 in another on the same page. | Instagram Platform: content publishing, read 2026-10-22 |