Backend Testing Made Simple

Send Smart Dummy Data
to Your Backend

Generate realistic test data with custom JSON formats and various distribution patterns. Send it via HTTP, MQTT, or NATS and monitor real-time results.

Real-time WebSocket monitoring
Custom JSON payload formats
Multiple data patterns

Configure Test Data

Choose your protocol and set up data generation parameters

Webhook Settings

Headers & Authentication

Security Note

Headers are not stored server-side but avoid using production API keys for testing.

JSON format for HTTP headers (optional)

Webhook Behavior

JSON data will be sent via POST request to your webhook endpoint. Configure your JSON payload in the section below.

VALUE - Current data value
TIMESTAMP - Current timestamp
LAT - Latitude (geo pattern)
LON - Longitude (geo pattern)

Data Pattern & Payload Configuration

Please enter valid JSON format

Use placeholders like VALUE, TIMESTAMP, LAT, LON that will be replaced with generated data

Generation Settings

5
160
5s
1s60s

Real-time Results

Monitor your data batches and individual requests

No data batches sent yet. Configure your settings and click Send to begin.

Built for various protocols

From HTTP APIs to MQTT brokers and NATS messaging - test with confidence using intelligent data patterns

IoT Device Simulation

Simulate temperature sensors, GPS trackers, and smart devices sending data to your MQTT brokers or HTTP endpoints.

  • Real-time data streams
  • Geographic coordinates
  • Sensor readings

Development & Testing

Speed up development by generating consistent test data for your applications without setting up complex test databases.

  • JSON payload formats
  • Data validation
  • Multiple protocols

Demo & Presentations

Create impressive live demos with flowing data streams that showcase your platform's capabilities to clients and stakeholders.

  • Live data visualization
  • Professional appearance
  • Reliable performance

Real-World Example: IoT Fleet Management

Test your fleet management system by simulating vehicles sending GPS coordinates, fuel levels, and engine diagnostics via MQTT. Validate your data processing pipeline before deploying real devices.

GPS TrackingMQTT ProtocolReal-time Data
📍 Vehicle ID: TRUCK_001
🗺️ Latitude: 40.7589
🗺️ Longitude: -73.9851
⛽ Fuel Level: 68%
🔧 Engine Status: OK

Usage Guidelines

Important information about using Fakely responsibly and effectively in your development workflow.

Development & Testing Only

Fakely is designed for development, testing, and demonstration purposes. Not recommended for production data processing.

No Sensitive Data

Do not send personally identifiable information, secrets, or confidential data through our service.

Rate Limits Apply

Fair usage policies are in place to ensure service availability for all users. Excessive usage may be throttled.

Best Effort Service

We strive for high availability but provide no SLA guarantees. Service may be interrupted for maintenance or updates.

Getting Started

Fakely is perfect for prototyping, testing integrations, and demonstrating data flows.

1-60
Data items per session
1-60s
Configurable intervals
HTTP + MQTT + NATS
Supported protocols