VidSmaller n8n Workflow: Check Video Upload Sizes (Discord/WhatsApp/Gmail)

Check Discord, WhatsApp, and Email video upload limits in seconds—before you hit “send”

VidSmaller’s n8n workflow automatically measures the file size of each video URL (via HTTP HEAD) and uses VidSmaller’s estimate API to tell you whether your videos are ready for Discord, WhatsApp, or Gmail-style email upload constraints—or if you should compress first.

What this workflow does

• Accepts input via manual run or webhook: You can execute it using the built-in sample videos, or send a POST request to the webhook with a JSON payload containing a videos array of { "label": "...", "url": "..." } items.
• Fetches video sizes without downloading: For each URL, it performs an HTTP HEAD request to read the Content-Length header.
• Handles unknown sizes safely: If Content-Length is missing or the request errors, the video is marked as size unknown.
• Estimates platform fit with VidSmaller: When a size is available, it calls VidSmaller’s /api/v1/estimate endpoint to determine safe upload targets and whether compression is recommended.
• Generates a consolidated plain-text report: Videos are categorized as ready to upload, needs compression (with suggested target size/settings), or size unknown—then all results are returned in one response.

Use cases

• Automation engineers validating user-submitted video URLs before posting to Discord.
• Teams preparing content for WhatsApp sharing with clear “compress vs. send” guidance.
• SaaS operators building preflight checks for video uploads to email workflows (e.g., Gmail-style delivery constraints) to reduce failed sends.

Technical details

• n8n nodes/workflow logic: webhook, if, set, code, switch, merge
• HTTP HEAD sizing: Uses HTTP HEAD requests to extract Content-Length in MB.
• VidSmaller integration: Calls /api/v1/estimate to produce platform verdicts and compression recommendations.