How to Post to Multiple Social Media at Once

Waarom één voor één posten je tijd kost

Think about what happens every time you finish editing a video. You open TikTok, upload, write a caption, pick a cover. Then you do the same thing on Instagram. Then YouTube. Then LinkedIn. Before you know it, 30 minutes have gone by and you haven\'t done any actual creative work.

The math gets worse when you manage multiple brands. Five clients with ten platforms each means fifty manual uploads per piece of content. That\'s not sustainable, and it\'s exactly the problem that a social media API solves.

Wat je nodig hebt voordat je begint

• An Upload-Post account (the free plan includes 10 uploads per month)
• Your API key, which you can generate from the API Sleutels dashboard
• Minstens één sociaal media-account verbonden via je Upload-Post-profiel
• Een video- of afbeeldingsbestand dat klaar is om te publiceren

Stap 1: Maak je account aan en verbind platforms

Head over to app.upload-post.com and create a free account. Geen creditcard nodig. Once you\'re in, go to User Management and create a profile. Think of a profile as a container that groups all the social accounts for one brand or client.

From that profile, connect the platforms you want. Upload-Post currently supports TikTok, Instagram, YouTube, LinkedIn, Facebook, X (Twitter), Threads, Pinterest, Reddit and Bluesky. You can connect all ten or just the ones that matter for your workflow.

Stap 2: Verkrijg je API-sleutel

Navigate to API Sleutels in the dashboard and generate a new key. Copy it somewhere safe because you\'ll use it in every API request as your authentication header. The format is simple:

Stap 3: Stuur één verzoek, publiceer overal

This is where the magic happens. Instead of uploading separately to each platform, you make a single POST request to the /api/upload endpoint and pass multiple platform[] parameters. The API handles the rest: format conversion, aspect ratio adaptation, caption length limits, everything.

cURL example

curl -X POST https://api.upload-post.com/api/upload \
  -H "Autorisatie: Apikey jouw-api-sleutel-hier" \
  -F "[email protected]" \
  -F "user=mybrand" \
  -F "title=Check out our latest product launch" \
  -F "platform[]=tiktok" \
  -F "platform[]=instagram" \
  -F "platform[]=youtube" \
  -F "platform[]=linkedin" \
  -F "platform[]=facebook" \
  -F "platform[]=threads"

That\'s it. Six platforms, one command. You can add up to all ten supported platforms in the same request.

Python voorbeeld

from upload_post import UploadPostClient

client = UploadPostClient(api_key="your-api-key-here")

response = client.upload_video(
    video_path="/path/to/my-video.mp4",
    title="Bekijk onze nieuwste productlancering",
    user="mybrand",
    platforms=["tiktok", "instagram", "youtube", "linkedin"]
)

for platform, result in response["results"].items():
    if result["success"]:
        print(f"{platform}: {result['url']}")
    else:
        print(f"{platform}: failed")

You can install the Python SDK with pip install upload-post. There\'s also a JavaScript SDK available through npm.

Node.js voorbeeld

import { UploadPost } from 'upload-post';

const uploader = new UploadPost('your-api-key-here');

const result = await uploader.upload('/path/to/my-video.mp4', {
    title: 'Bekijk onze nieuwste productlancering',
    user: 'mybrand',
    platforms: ['tiktok', 'instagram', 'youtube', 'linkedin', 'threads']
});

console.log(result);

Stap 4: Begrijp de API-respons

After the upload completes, the API returns a JSON response with individual results for each platform. This way you can confirm which posts went live and get direct links to them.

{
  "success": true,
  "results": {
    "tiktok": {
      "success": true,
      "url": "https://www.tiktok.com/@yourbrand/video/123..."
    },
    "instagram": {
      "success": true,
      "url": "https://www.instagram.com/p/ABC..."
    },
    "youtube": {
      "success": true,
      "url": "https://youtube.com/shorts/XYZ..."
    }
  },
  "usage": {
    "count": 12,
    "limit": 100,
    "last_reset": "2025-09-01T10:00:00.000Z"
  }
}

Platform specifieke opties die je moet weten

While the basic request works for most cases, each platform has specific parameters you can use to fine tune your posts. Here are the most useful ones:

Check the full API reference for every available parameter on each platform.

Wil je de code overslaan? Gebruik n8n of Make.com

If you\'re not a developer, you can still post to all your platforms at once using visual automation tools. Upload-Post has official integrations with the most popular ones:

• n8n has an official Upload-Post community node. You can trigger a workflow from Google Drive, Dropbox or any source and publish to all platforms automatically. There are also ready made templates you can import in one click.
• Make.com (formerly Integromat) works great with the HTTP module and multipart form data.
• Zapier can connect your favorite tools to Upload-Post for fully automated publishing.

Foto\'s en carrousels naar meerdere platforms plaatsen.

Videos aren\'t the only content type you can distribute. The /api/upload_photos endpoint lets you publish images and carousels across platforms in the same way. Just swap the video parameter for photos[]:

curl -X POST https://api.upload-post.com/api/upload_photos \
  -H "Autorisatie: Apikey jouw-api-sleutel-hier" \
  -F "photos[][email protected]" \
  -F "photos[][email protected]" \
  -F "photos[][email protected]" \
  -F "user=mybrand" \
  -F "title=Our new collection" \
  -F "platform[]=instagram" \
  -F "platform[]=tiktok" \
  -F "platform[]=linkedin"

Instagram will create a carousel post, TikTok will turn them into a slideshow, and LinkedIn will display them as a multi-image post. Each platform gets the format that works best for its audience.

Automatisch een eerste commentaar toevoegen

A common strategy on Instagram and TikTok is to put hashtags or a call to action in the first comment instead of the caption. You can do this automatically by adding the first_comment parameter to your request:

-F "first_comment=#marketing #socialmedia #contentcreator Follow for more!"

This works on Instagram, Facebook, Threads, Bluesky, Reddit, X and YouTube. You can even set different comments per platform using parameters like instagram_first_comment or x_first_comment.

Tekenlimieten om in gedachten te houden

When you\'re posting the same caption to multiple platforms, remember that each one has different character limits. Here are the main ones:

You can use platform specific title parameters (like tiktok_title, youtube_title, etc.) to set a different caption for each platform if needed. Our character counter tool can help you check limits before posting.

Asynchrone uploads voor grote bestanden

If your video is large or you\'re posting to many platforms, the request might take a while. You can add async_upload=true to get an immediate response with a request_id, then poll the status later:

curl https://api.upload-post.com/api/uploadposts/status?request_id=abc123 \
  -H "Autorisatie: Apikey jouw-api-sleutel-hier"

You can also set up webhooks to get notified automatically when each platform upload finishes.

Veelgestelde vragen

Heeft het plaatsen op alle platforms tegelijk een negatieve invloed op mijn bereik of betrokkenheid?

No. Upload-Post uses each platform\'s official API and OAuth authentication. The platforms see your content as a regular post. There are no rotating IPs, no bots, no workarounds. Your views and engagement stay exactly the same as if you uploaded manually.

Kan ik het bijschrift voor elk platform aanpassen?

Yes. The title parameter sets the default caption for all platforms. But you can override it per platform using tiktok_title, instagram_title, youtube_title, linkedin_title, and so on. This is perfect when you want longer descriptions on YouTube and shorter ones on TikTok.

Welke videoformaten werken?

MP4 with H.264 encoding works on every platform. If your file uses a different codec, Upload-Post will transcode it automatically. You can also process videos beforehand using our built in FFmpeg editor.

Hoeveel kost dit?

There\'s a free plan with 10 uploads per month. Paid plans start at $16/month (billed annually) and include unlimited uploads. That\'s a fraction of what tools like Buffer or Hootsuite charge, especially when you factor in the per-channel pricing those tools use.