Resources
Free social media tools
Quick tools to check captions and image sizes, plus AI helpers you can try for free in JustCaster.
- Free
Character counter
Check your caption against every network’s limit. Free, right on this page.
Use the counter - Free
Image size guide
Recommended image and video sizes for every network.
See the sizes - In the app
Caption generator
Get caption ideas for any photo, in your brand’s tone.
Try it free - In the app
Hashtag suggestions
Relevant hashtags for your post and your niche.
Try it free - In the app
Best time to post
When your own audience is most active, by network.
Try it free - In the app
Link-in-bio page
A free landing page for your profile link.
Learn more
Character counter
Write once and see instantly whether your caption fits every network.
0 characters, counted the way most networks count them.
- X0 / 280
- Threads0 / 500
- Google Business Profile0 / 1,500
- Instagram caption0 / 2,200
- TikTok caption0 / 2,200
- LinkedIn post0 / 3,000
- Pinterest description0 / 500
- YouTube title0 / 100
Limits are the commonly published limits at the time of writing and can change. Some counts (for example links on X) may differ slightly.
Image size guide
Recommended sizes for the most common formats.
| Network | Format | Recommended size |
|---|---|---|
| Feed post | 1080 × 1350 px (4:5) | |
| Reels and Stories | 1080 × 1920 px (9:16) | |
| Link or image post | 1200 × 630 px (1.91:1) | |
| TikTok | Video | 1080 × 1920 px (9:16) |
| Image post | 1200 × 627 px (1.91:1) | |
| YouTube | Thumbnail | 1280 × 720 px (16:9) |
| YouTube | Shorts | 1080 × 1920 px (9:16) |
| Standard Pin | 1000 × 1500 px (2:3) | |
| X | Image | 1600 × 900 px (16:9) |
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