1
Send a JSON payload
POST to the template endpoint with the values you want rendered. Authenticate with your API key.
Youtube Thumbnail Generator API
High-contrast 16:9 thumbnails optimized for click-through
Use cases for the Youtube Thumbnail Generator API
The YouTube Thumbnail template is the shortest path to a working youtube thumbnail generator api from your stack. Send a small JSON payload, get back a tested PNG that fits your brand. No browser, no headless Chrome wrangling, no design tooling on your side.
Common reasons people reach for this template:
- YouTube video thumbnails
- Vimeo and embedded video covers
- Course lesson previews
How it works
2
We render the image
The template is rendered server-side as a 1200x630 PNG (or whatever dimensions the template defines).
3
You get back a URL
The response includes a CDN URL for the PNG. Cache it, embed it, attach it to a tweet, anything you need.
Quick example
A single cURL call to render a YouTube Thumbnail as a PNG:
curl -X POST https://app.html2img.com/api/v1/templates/youtube-thumbnail \
-H "X-API-Key: YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{"title":"I built a $0 SaaS in 7 days","eyebrow":"CASE STUDY","duration":"14:22","host_name":"Devon Reed","host_avatar_url":"https://i.pravatar.cc/160?img=33","background_image_url":"https://picsum.photos/seed/yt-thumb/1280/720","background_color":"#0F172A","accent_color":"#FACC15"}'For the full PHP, Node and Python equivalents, plus every input the template accepts, see the YouTube Thumbnail API reference. Setting up your key is covered in the authentication guide.
Inputs at a glance
A quick summary of what the YouTube Thumbnail template accepts. The full reference, including example values and array shapes, is in the docs.
| Name | Type | Required |
|---|---|---|
| title | string | Required |
| eyebrow | string | Optional |
| duration | string | Optional |
| host_name | string | Optional |
| host_avatar_url | url | Optional |
| background_image_url | url | Optional |
| background_color | string | Optional |
| accent_color | string | Optional |
See the full inputs reference for descriptions, examples and validation rules.
Related templates
Ready to render your first YouTube Thumbnail?
Sign up free, grab an API key, send a payload. The pricing page covers the higher-volume plans if you outgrow the free tier.