Upload images via REST API and get YOLO-format labels back in milliseconds. No infrastructure needed — just an API key.
curl -X POST https://api.yololabel.com/v1/label \
-H "Authorization: Bearer ylk_your_api_key" \
-F "image=@photo.jpg"
# Response
{
"detections": [
{
"class": "person",
"confidence": 0.97,
"bbox": [120, 45, 380, 620]
}
],
"yolo_labels": "0 0.39 0.52 0.40 0.88"
}Three steps to auto-labeled images
Register for free and generate an API key from your dashboard in seconds.
POST images to our REST API. Supports sync responses and async jobs for batches.
Receive bounding boxes, class labels, and confidence scores in YOLO format — ready to train.
Production-ready from day one
Synchronous API for real-time applications. Async jobs for large batches.
Results in standard YOLO .txt format compatible with YOLOv5, v8, and v9.
Create, rotate, and revoke API keys from your dashboard at any time.
Track image usage, API calls, and compute time with daily breakdowns.
Submit large batches and poll for results. No timeouts, no dropped requests.
Built-in rate limiting per plan. Upgrade seamlessly as you scale.
Join teams using YoloLabel AI. Start for free — no credit card required.
Get Started for Free