Operations medium to set up

Upload Images To S3 Via Slack

Upload images from Slack to a Cloudflare S3 bucket via a modal, choosing folders and receiving direct file URLs in the chat.

Verified 2026-07-07

Developer-EngineeringOps-IT

What it does

Upload images directly from Slack by selecting a folder in a modal, then instantly receive direct file URLs for your public-facing assets without leaving the chat. The workflow automatically stores these files in your Cloudflare S3 bucket while managing dynamic folder organization for you.

How it works

When it runs: Run manually · Manual · on demand via Slack modal
How hands-off: Assists you, you do the final step
Setup: An afternoon · about an afternoon
Works with: Slack, S3, HTTP Request

Tools that fit

Services

Slack : User interaction and confirmation

S3 : Cloud storage upload

api

HTTP Request : Workflow orchestration and API calls

Watch out for

Slack has a strict file size limit for direct uploads so you must verify the image dimensions and resolution before initiating the S3 transfer to avoid silent failures.
Pre-signed URLs expire quickly so ensure your workflow logic generates them immediately before the upload attempt rather than storing them in long-term variables.
Cloudflare R2 does not support standard AWS SDK signatures directly in all HTTP libraries so you may need to manually construct the Authorization header using HMAC-SHA256.
Special characters in folder names can break S3 object keys so sanitize user input by replacing spaces with hyphens and removing non-alphanumeric symbols.

Seen in the wild

n8n: Upload images to an S3 Bucket via a Slack Bot template

Want this running in your business?

This is what I do. I design and build AI agents like this one, and keep them running. If you want it set up for your team instead of doing it yourself, get in touch.

Get in touch

Who it's for

Built for developers who want the busywork around code automated, not the code itself.

Ops-IT teams triaging their own internal requests get the same pattern, different queue.

Frequently asked questions

Who is this for?

developers and engineers and ops and IT teams, or anyone doing operations work who wants this handled automatically rather than manually.

How long does it take to set up?

An afternoon: plan for about an afternoon to get it running end to end.

Related use cases

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