Free creator tool
Instagram Grid Generator
Upload an image
Drag and drop, or click to select
PNG, JPG, WEBP up to 10MB
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Postonus Pro
Loved this tool? Stop copying and pasting to schedule.
Connect 14+ channels (including Bluesky, Threads, and Reddit) in one dashboard. Schedule your content once, let Postonus auto-repurpose it native to every network.
No card until you publish.
Why people use it
- Turn one artwork into a feed-ready 3x1, 3x2, or 3x3 Instagram layout.
- See the exact seam lines before exporting, so you can pick artwork where the cuts land in the right place.
- Save time on launch graphics, portfolio drops, and campaign teasers.
Suggested flow
- 01
Upload the source
Start with the image you want to spread across the feed and choose the grid size that matches the campaign.
- 02
Check the seams
The preview shows exactly where each tile will be cut, so you can confirm faces and text land clear of the lines before exporting.
- 03
Export and publish
Download the slices in order, then upload them to Instagram in sequence for a clean final grid.
About this tool
A simple way to build cleaner multi-post Instagram layouts
The grid generator helps creators and small teams prepare coordinated feed reveals without hand-cutting assets in design software every time.
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Questions
Frequently asked questions Everything the first evaluation usually needs.
- What if I'm already on Buffer / Pallyy / Publer?
Keep them. Run Postonus side-by-side for 30 days. Put your 3 best posts into a Growth Workflow. If it isn't earning its keep, cancel us — not them.
- Does the AI write my posts?
No. You write the post. Postonus's AI re-fits your draft into each platform's native shape — character limits, tone, hashtag norms. You review every variant before it publishes. Voice profile keeps it sounding like you.
- Which platforms do you support?
Fourteen: Instagram, TikTok, YouTube, LinkedIn, Facebook, X, Threads, Pinterest, Bluesky, Reddit, Telegram, Discord, Google Business Profile, and Tumblr. WhatsApp Groups support is in beta.
- How does the free workspace and the 14-day trial work?
Sign up with no card and you get a free workspace: up to 3 connected channels, unlimited writing, and dated drafts on the calendar. Scheduling and publishing need a card. Adding one starts a 14-day trial on the plan you pick — nothing is charged until day 15, and your drafts are already there waiting.
- Can I import from another tool?
Yes. Bulk CSV import handles up to 50 posts per file (multiple files OK). Direct-from-Buffer import is on the Q4 roadmap.
- What happens if a post fails to publish?
Workers retry with exponential backoff. Failures show up in the Activity Feed with one-click retry. We email you only for unrecoverable failures (e.g. revoked token).