Limits by Social Network

Reference for all supported post types, caption limits, and media specifications per social network.
Any post that violates these constraints will be rejected before publishing.

Instagram (aka Instagram Business)

Media Post

Property	Limit
Caption max length	2,200 characters
Caption max mentions	10
Caption max hashtags	30
First comment max length	2,200 characters
First comment max mentions	5
First comment max hashtags	30
Max media items	10
Max images	10
Max videos	10
Mix images & videos	✅ Yes

Image specs

Property	Limit
Max file size	8 MB
Min width	320 px
Max width	1,440 px
Aspect ratio	0.80 – 1.91 (4:5 to 1.91:1)

Video specs

Property	Limit
Max file size	300 MB
Min width	320 px
Max width	1,920 px
Min FPS	23
Max FPS	60
Min duration	3 seconds
Max duration	900 seconds (15 min)
Aspect ratio	0.01 – 10

Story Post

Property	Limit
Caption max length	2,200 characters
Caption max mentions	10
Caption max hashtags	30
First comment max length	2,200 characters
First comment max mentions	5
First comment max hashtags	30
Max media items	1
Mix images & videos	✅ Yes

Image specs

Property	Limit
Max file size	8 MB
Min width	320 px
Max width	3,840 px
Aspect ratio	0.1 – 10

Video specs

Property	Limit
Max file size	100 MB
Min width	480 px
Max width	1,920 px
Min FPS	23
Max FPS	60
Min duration	3 seconds
Max duration	60 seconds
Aspect ratio	0.1 – 10

Reel Post

Property	Limit
Caption max length	2,200 characters
Caption max mentions	10
Caption max hashtags	30
First comment max length	2,200 characters
First comment max mentions	5
First comment max hashtags	30
Max media items	1 (video only)

Video specs

Property	Limit
Max file size	300 MB
Min width	320 px
Max width	1,920 px
Min FPS	23
Max FPS	60
Min duration	3 seconds
Max duration	900 seconds (15 min)
Aspect ratio	0.01 – 10

Instagram V2 (aka Instagram)

Instagram V2 shares the same limits as Instagram across all post types (Media, Story, Reel), with one addition for Stories:

Story video — thumbnail (preview) specs

Property	Limit
Min width	480 px
Max width	1,920 px
Min height	480 px
Max height	1,920 px
Aspect ratio	0.10 – 10

Facebook

Status Post

Property	Limit
Supports media	❌ No
Caption min length	1 character
Caption max length	5,000 characters
Caption max mentions	1,000
Caption max hashtags	1,000
First comment max length	5,000 characters

Media Post

Property	Limit
Caption max length	5,000 characters
Caption max mentions	1,000
Caption max hashtags	1,000
First comment max length	5,000 characters
Max media items	10
Max images	10
Max videos	1
Mix images & videos	❌ No

Image specs

Property	Limit
Max file size	10 MB
Min width	320 px
Max width	3,840 px
Min height	320 px
Max height	3,840 px

Video specs

Property	Limit
Max file size	2 GB
Min width	480 px
Max width	1,920 px
Min height	480 px
Max height	1,920 px
Min FPS	1
Max FPS	60
Max duration	3,600 seconds (1 hour)

Story Post

Property	Limit
Caption max length	5,000 characters
Caption max mentions	1,000
Caption max hashtags	1,000
First comment max length	5,000 characters
Max media items	1
Mix images & videos	✅ Yes

Image specs

Property	Limit
Max file size	10 MB
Min width	540 px
Max width	1,080 px
Min height	960 px
Max height	1,920 px
Aspect ratio	0.5625 (9:16 only)

Video specs

Property	Limit
Max file size	4 GB
Min width	540 px
Max width	1,080 px
Min height	960 px
Max height	1,920 px
Min FPS	24
Max FPS	60
Min duration	3 seconds
Max duration	90 seconds
Aspect ratio	0.5625 (9:16 only)

Reel Post

Property	Limit
Caption max length	5,000 characters
Caption max mentions	1,000
Caption max hashtags	1,000
First comment max length	5,000 characters
Max media items	1 (video only)

Video specs

Property	Limit
Max file size	4 GB
Min width	540 px
Max width	1,080 px
Min height	960 px
Max height	1,920 px
Min FPS	24
Max FPS	60
Min duration	3 seconds
Max duration	90 seconds
Aspect ratio	0.5625 (9:16 only)

Thumbnail (preview) specs

Property	Limit
Min width	540 px
Max width	1,080 px
Min height	960 px
Max height	1,920 px
Aspect ratio	0.5625 (9:16 only)

Link Post

Property	Limit
Supports media	❌ No
Caption max length	5,000 characters
Caption max mentions	1,000
Caption max hashtags	1,000
First comment max length	5,000 characters
Link required	✅ Yes
Link title required	✅ Yes
Link image required	❌ No
Link description required	❌ No

Status Post

Property	Limit
Supports media	❌ No
Caption min length	1 character
Caption max length	4,000 characters
Caption max mentions	1,000
Caption max hashtags	1,000
First comment max length	5,000 characters

Media Post

Property	Limit
Caption max length	4,000 characters
Caption max mentions	1,000
Caption max hashtags	1,000
First comment max length	5,000 characters
Max media items	20
Max images	20
Max videos	1
Mix images & videos	❌ No

Image specs

Property	Limit
Max file size	50 MB
Min width	320 px
Max width	3,840 px
Min height	320 px
Max height	3,840 px

Video specs

Property	Limit
Max file size	500 MB
Min duration	3 seconds
Max duration	1,800 seconds (30 min)

Link Post

Property	Limit
Supports media	❌ No
Caption min length	1 character
Caption max length	4,000 characters
Caption max mentions	1,000
Caption max hashtags	1,000
First comment max length	5,000 characters
Link required	✅ Yes
Link title required	✅ Yes
Link image required	❌ No
Link description required	❌ No

Threads

Status Post

Property	Limit
Supports media	❌ No
Caption min length	1 character
Caption max length	500 characters
Caption max mentions	10
Caption max hashtags	30
First comment max length	500 characters

Link Post

Property	Limit
Supports media	❌ No
Caption min length	1 character
Caption max length	500 characters
Caption max mentions	10
Caption max hashtags	30
First comment max length	500 characters
Link required	✅ Yes
Link title required	❌ No
Link image required	❌ No
Link description required	❌ No

Media Post

Property	Limit
Caption max length	500 characters
Caption max mentions	10
Caption max hashtags	30
First comment max length	500 characters
Max media items	20
Max images	20
Max videos	20
Mix images & videos	✅ Yes

Image specs

Property	Limit
Max file size	8 MB
Min width	320 px
Max width	1,440 px
Aspect ratio	0.1 – 10

Video specs

Property	Limit
Max file size	1 GB
Min width	320 px
Max width	1,920 px
Min FPS	23
Max FPS	60
Min duration	0.1 seconds
Max duration	300 seconds (5 min)
Aspect ratio	0.01 – 10

TikTok

Media Post

Supports both video and image (carousel) formats. Images and videos cannot be mixed.

Property	Limit
Caption max length	2,200 characters
Caption max mentions	30
Caption max hashtags	1,000
First comment max length	150 characters
First comment max mentions	5
Max media items	35
Max images	35
Max videos	1
Mix images & videos	❌ No

Image specs

Property	Limit
Max file size	20 MB
Min width	360 px
Max width	1,920 px
Min height	360 px
Max height	1,920 px
Aspect ratio	0.5625 – 1.778 (9:16 to 16:9)

Video specs

Property	Limit
Max file size	1 GB
Min width	360 px
Max width	1,920 px
Min height	360 px
Max height	1,920 px
Min FPS	23
Max FPS	60
Min duration	3 seconds
Max duration	600 seconds (10 min)*
Aspect ratio	0.5625 – 1.778 (9:16 to 16:9)

*Maximum duration may vary based on TikTok account-level permissions.

Reel Post

Video-only format optimized for TikTok's primary feed.

Property	Limit
Caption max length	2,200 characters
Caption max mentions	30
Caption max hashtags	1,000
First comment max length	150 characters
First comment max mentions	5
Max media items	1 (video only)

Video specs

Property	Limit
Max file size	1 GB
Min width	360 px
Max width	1,920 px
Min height	360 px
Max height	1,920 px
Min FPS	23
Max FPS	60
Min duration	3 seconds
Max duration	600 seconds (10 min)*
Aspect ratio	0.5625 – 1.778 (9:16 to 16:9)

Thumbnail (preview) specs

Property	Limit
Min width	360 px
Max width	1,920 px
Min height	360 px
Max height	1,920 px
Aspect ratio	0.5625 – 1.778 (9:16 to 16:9)

*Maximum duration may vary based on TikTok account-level permissions.

Google My Business

Status Post

Property	Limit
Supports media	❌ No
Supports first comment	❌ No
Supports links	❌ No
Supports mentions	❌ No
Caption max length	1,500 characters
Caption max hashtags	1,000

Media Post

Property	Limit
Supports first comment	❌ No
Supports links	❌ No
Supports mentions	❌ No
Caption max length	1,500 characters
Caption max hashtags	1,000
Max media items	10
Max images	10
Max videos	10
Mix images & videos	✅ Yes

Image specs

Property	Limit
Max file size	5 MB
Min width	250 px
Max width	1,920 px
Min height	250 px
Max height	1,920 px
Aspect ratio	0.5625 – 1.778 (9:16 to 16:9)

Video specs

Property	Limit
Max file size	75 MB
Min width	405 px
Max width	1,920 px
Min height	720 px
Max height	1,080 px
Min FPS	23
Max FPS	60
Min duration	1 second
Max duration	30 seconds
Aspect ratio	0.5625 – 1.778 (9:16 to 16:9)

Feature Support Matrix

Network	Status	Media	Story	Reel	Link
Instagram	—	✅	✅	✅	—
Instagram V2	—	✅	✅	✅	—
Facebook	✅	✅	✅	✅	✅
LinkedIn	✅	✅	—	—	✅
Threads	✅	✅	—	—	✅
TikTok	—	✅	—	✅	—
Google My Business	✅	✅	—	—	—

Caption & First Comment Support Matrix

Network	Post Type	Caption	First Comment	Links	Mentions
Instagram	Media	✅	✅	✅	✅
Instagram	Story	✅	✅	✅	✅
Instagram	Reel	✅	✅	✅	✅
Facebook	Status	✅	✅	✅	✅
Facebook	Media	✅	✅	✅	✅
Facebook	Story	✅	✅	✅	✅
Facebook	Reel	✅	✅	✅	✅
Facebook	Link	✅	✅	✅	✅
LinkedIn	Status	✅	✅	✅	✅
LinkedIn	Media	✅	✅	✅	✅
LinkedIn	Link	✅	✅	✅	✅
Threads	Status	✅	✅	✅	✅
Threads	Media	✅	✅	✅	✅
Threads	Link	✅	✅	✅	✅
TikTok	Media	✅	✅	✅	✅
TikTok	Reel	✅	✅	✅	✅
Google My Business	Status	✅	❌	❌	❌
Google My Business	Media	✅	❌	❌	❌

Limits by Social Network

Instagram (aka Instagram Business)#

Media Post#

Story Post#

Reel Post#

Instagram V2 (aka Instagram)#

Facebook#

Status Post#

Media Post#

Story Post#

Reel Post#

Link Post#

LinkedIn#

Status Post#

Media Post#

Link Post#

Threads#

Status Post#

Link Post#

Media Post#

TikTok#

Media Post#

Reel Post#

Google My Business#

Status Post#

Media Post#

Feature Support Matrix#

Caption & First Comment Support Matrix#

Instagram (aka Instagram Business)

Media Post

Story Post

Reel Post

Instagram V2 (aka Instagram)

Facebook

Status Post

Media Post

Story Post

Reel Post

Link Post

LinkedIn

Status Post

Media Post

Link Post

Threads

Status Post

Link Post

Media Post

TikTok

Media Post

Reel Post

Google My Business

Status Post

Media Post

Feature Support Matrix

Caption & First Comment Support Matrix