Instagram to Pinterest is the cross-posting route that changes what your content is for. On Instagram, a post lives or dies on engagement in its first day or two; on Pinterest, the same image becomes a search result that can keep surfacing for months — with a clickable destination link Instagram never gives you. The mechanics, though, are a genuine translation job: 4:5 posts meet a 2:3 feed, a 2,200-character caption gets split into a 100-character title and a 500-character description, and hashtags stop mattering almost entirely.
This guide maps every spec that changes between the two composers, what genuinely breaks in transit, and the exact steps to republish posts and Reels as pins — by hand, or composed once in SocialKit and customized per network.
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Everything that changes between the two composers, side by side.
| Spec | Instagram (from) | Pinterest (to) |
|---|---|---|
| Primary canvas | 1080 × 1350 px · 4:5 (post) | 1000 × 1500 px · 2:3 (pin) |
| Caption limit | 2,200 characters | Title 100 characters · description 500 characters |
| Video length | Reels up to 3 minutes for standard accounts (Instagram has been extending limits) | Video Pins from 4 seconds up to 15 minutes per Pinterest’s published specs; shorter performs better organically |
| Hashtags | Capped at 5 per post (rolling out since Dec 2025), counted across caption and comments; 3–5 focused tags was already Instagram’s guidance | Treated as plain keywords — Pinterest search matters more than tags |
| Destination link | Captions don’t support clickable links — traffic routes through “link in bio” | Every pin carries a clickable destination link to your site |
| Content lifespan | Engagement typically concentrates in the first day or two | Pins keep surfacing in search and recommendations for months |
| Sound | Reels lead with audio; trending sounds drive distribution | Video pins autoplay muted — sound starts only when tapped |
The good news
The fine print
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Tip 1
Translate captions, don’t trim them: the Instagram version answers “what’s happening?”; the Pinterest version answers “what would someone type to find this?”. Put that search phrase in the title’s first 40 characters.
Tip 2
Recut Reels to a glanceable length: Pinterest accepts up to 15 minutes of video but itself recommends 6–15 seconds for feed videos — and since autoplay is muted, open on the finished result so the first frame does the selling.
Tip 3
Treat Pinterest as your compounding archive: a feed post’s engagement concentrates in its first days, while pins keep resurfacing in search for months — re-pin older Instagram winners as fresh pins on a rolling basis.
FAQ
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Yes — Pinterest accepts 4:5 and square images and displays them fine. But its own specs recommend 2:3 (1000 × 1500 px), which claims more height in the masonry feed, so recropping your strongest evergreen images is usually worth the extra step.
It gets split and shortened: Pinterest gives you a 100-character title plus a 500-character description (as of June 2026), and feeds surface only about the first 50–60 characters of the description. Rewrite the caption as a keyword-led summary rather than pasting it in.
Barely. Pinterest accepts up to 20 but has de-emphasized hashtags for years — pins rank through keywords in titles and descriptions. Drop the Instagram tag block and spend those characters on searchable phrasing instead.
Often, yes: the 9:16 file uploads unchanged, and video stands out in a feed of stills. Two caveats — Pinterest autoplays video muted, so the Reel must work without sound, and Pinterest recommends keeping feed videos to 6–15 seconds, so a tighter recut usually outperforms the full Reel.
Compose once, customize the caption per network, and let SocialKit publish to Instagram, Pinterest, and 9 more platforms on schedule — no re-uploading, no copy-paste.
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