Generate & schedule social media content with GPT-4 and Buffer from Google Sheets

Generate & schedule social media content with GPT-4 and Buffer from Google Sheets

Content & Creative
n8n
The calendar stays in a spreadsheet anyone on the team can edit, so planning a month never needs automation access.
Source
n8n
Tools
Google Sheets, OpenAI, Buffer
Runs
Daily at 9 AM
Cost
Free template, API costs
Last updated
August 7, 2026

What it is.

A cron runs daily at 9 AM, reads the topics scheduled for that day out of a Google Sheet, and generates a version of each per platform. Twitter gets something short, LinkedIn gets a longer professional post, Instagram gets visual framing.

DALL-E generates an accompanying image, then everything queues through Buffer. The calendar lives in a spreadsheet, so a marketer can plan a month without opening the workflow.

What you get.

  • A daily read of a Google Sheets content calendar.
  • Platform-specific versions of each topic instead of one post cross-posted.
  • Generated images to accompany the posts.
  • Scheduling through Buffer across Twitter, LinkedIn, and Instagram.
  • A calendar anyone on the team can edit without touching automation.
HOW TO USE IT

How to set it up.

1

Build the Google Sheet calendar first, with a topic and a date per row.

2

Connect Buffer and confirm the channels you want, then delete the platform branches you do not use.

3

Rewrite the platform prompts in your own voice, since the defaults produce generic posts.

4

Turn image generation off if you have brand templates, because generated images rarely match a design system.

5

Set the 9 AM cron to run before your posting window, not during it.

6

Keep an approval step for the first month, and read everything before it queues.

Use cases

Calendar the team can edit

Keep the plan in a sheet and let the automation read from it daily.

One topic, several platforms

Get a version per platform instead of the same text everywhere.

Queue without opening the tool

Let it push to the scheduler so nobody logs in to paste posts.

Best for

A calendar that keeps slipping

Planning in a spreadsheet is easy. Writing three versions of every post is the work nobody gets to.

One person covering three platforms

The per-platform rewrite is the work, and this does the first draft of it.

Repurposing a content plan

If the blog calendar exists, the social calendar can be generated from the same rows.

Open the original.

Hosted on n8n, free to open.
Open the Tool

Questions about Generate & schedule social media content with GPT-4 and Buffer from Google Sheets

Will the posts sound like us?
Should I keep the image branch?
What's the risk of automatic queuing?

Questions about Content & Creative

How far ahead should social be scheduled?
Does a scheduling tool improve reach?
Strengths
  • Content is generated per platform, so each channel gets something written for it.
  • The calendar stays in Sheets, so planning does not require automation access.
  • Buffer handles the queue, so posting failures stay in a tool built for them.
Limitations
  • Generated posts read as generated unless you rewrite the prompts in your own voice.
  • Generated images usually miss a brand system, so most teams should switch that branch off.
  • It queues automatically, so a bad row in the sheet becomes a published post.
  • Buffer's free plan limits channels and scheduled posts, so check yours before you plan a month.
Skip this if
  • Skip it if you already pay for a scheduler your team plans inside.
Ideal for
  • Content marketers
  • Social media managers
  • Stage: Any stage

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