The Scenario
A new hire on your social team built out a fifteen-row post plan in a Google Sheet — one concept per row in column A. The concepts are solid. But there are no images, and your brand never posts text-only. The first batch is supposed to go live Wednesday.
It's Monday morning, and the images don't exist yet.
The bad version:
- Take concept one from column A, go to a design tool, describe what you want, download the result, upload it to Postiz, note the URL somewhere, paste it back into the sheet.
- Do that fifteen times, one concept at a time, context-switching between three tools on every row.
- Realize halfway through that the image style you chose for concepts 1–7 doesn't match the brand palette, and you now have to redo half of them.
That's the better part of a day, and you haven't written a single caption yet.
The Easy Way: One Prompt in SheetXAI
SheetXAI is an AI agent inside your Google Sheet. It reads each concept in column A, sends it to Postiz's image generation API, and writes the returned image URL back into column B — so your content plan goes from ideas to visual assets without leaving the sheet.
For each concept in column A of the Post Ideas sheet, generate an image using Postiz and paste the returned image URL into column B.
What You Get
- One AI-generated image per concept, triggered row by row from your sheet.
- Image URLs land in column B as each generation completes — you can open them directly to review before scheduling.
- If a generation fails on a specific row (invalid prompt, API error), a note appears in column B for that row rather than silently skipping it.
- The populated column B becomes your image library, ready for a scheduling pass once you've reviewed the results.
What If the Data Is Not Quite Ready
The concepts in column A are too vague for good image generation
Rewrite each concept in column A to be a specific, visual image prompt (describe scene, mood, and composition), write the revised prompt into column C, then generate a Postiz image from column C and paste the image URL into column B.
Some rows already have an image URL in column B and shouldn't be regenerated
For each row in the Post Ideas sheet where column B is empty, generate a Postiz image using the concept in column A and write the image URL into column B — skip any row that already has a URL.
I want to generate images and immediately schedule the posts in one operation
Read each post concept from column A of this sheet (15 rows), generate a Postiz AI image for each one, and write the image URL into column B — then schedule each post to the LinkedIn integration using the caption in column A and the image URL in column B, logging post IDs into column C.
Some concepts need copy improvements, image generation, and scheduling all in one pass
For each row in the Post Ideas sheet: expand the concept in column A into a 150-character LinkedIn caption and write it into column C, generate a Postiz image based on the original concept in column A and write the URL into column B, then schedule the post to the LinkedIn integration using column C for the caption and column B for the image — log the post ID into column D.
One prompt from idea to live queue. The sheet drives every step.
Try It
Get the 7-day free trial of SheetXAI and open any Google Sheet with post concepts sitting in a column waiting for visuals — ask it to generate Postiz images for all of them and write the URLs back. Also worth a look: Bulk schedule a content calendar and the Postiz MCP hub overview.