SmartPNG: High-Quality Image Compression – Reduce PNG & JPEG Sizes Online

API & WordPress Plugin

Integrate SmartPNG compression into your applications and WordPress sites.

WordPress Plugin

Seamlessly compress images directly within your WordPress dashboard.

Automatic image compression
Bulk compression for existing images
WordPress media library integration
Backup original images
Easy installation and setup

Calculate Your Price

Currency

Number of compressions: 1,000

1K25K50K

1 × 1000 compressionsUS$9.00 each

Total Price$9.00 USD

Get Api Key

$9.00

for 1,000 compressions

Developer API Documentation

Integrate SmartPNG compression into your applications with our REST API

Base URL

https://integration.smartpng.com/api

Authentication

All API requests require an API key. Include your API key in the request body or as a form parameter.

Get your API key from the Dashboard

1. Validate API Key

Check if your API key is valid and get remaining credits.

Endpoint

POST /validate

Request Body

{
  "api_key": "your_api_key_here"
}

Response

{
  "valid": true,
  "user_id": "user_id",
  "credits_remaining": 1000,
  "can_compress": true,
  "max_image_size": 52428800
}

2. Compress Image (Immediate)

Upload and compress an image immediately. Best for small to medium images.

Endpoint

POST /compress

Content-Type

multipart/form-data

Form Parameters

Parameter	Type	Required	Description
`api_key`	string	Yes	Your API key
`file`	file	Yes	Image file (PNG, JPEG, WebP)
`compression_level`	float	No	Compression quality (0.0-1.0, default: 0.7)
`background_processing`	boolean	No	Use background queue (default: false)

Response (Immediate Processing)

{
  "success": true,
  "job_id": "unique_job_id",
  "status": "completed",
  "message": "Image compressed successfully",
  "compressed_data": "base64_encoded_image",
  "original_size": 1048576,
  "compressed_size": 524288,
  "compression_ratio": 50.0
}

Response (Background Processing)

{
  "success": true,
  "job_id": "unique_job_id",
  "status": "queued",
  "message": "Image uploaded and queued for background processing"
}

3. Check Job Status

Check the status of a background compression job and retrieve the result.

Endpoint

GET /job-status/{job_id}?api_key=your_api_key

Response (Completed)

{
  "job_id": "unique_job_id",
  "status": "completed",
  "filename": "image.png",
  "original_size": 1048576,
  "compressed_size": 524288,
  "compression_ratio": 50.0,
  "compressed_url": "blob_storage_url",
  "compressed_data": "base64_encoded_image",
  "created_at": "2025-01-15T10:30:00Z"
}

Response (Failed)

{
  "job_id": "unique_job_id",
  "status": "failed",
  "filename": "image.png",
  "error_message": "Compression failed: Invalid image format",
  "created_at": "2025-01-15T10:30:00Z"
}

Error Codes

Status Code	Description
`200`	Success
`400`	Bad Request - Invalid parameters
`401`	Unauthorized - Invalid API key
`413`	Payload Too Large - Image exceeds 50MB
`429`	Too Many Requests - Insufficient credits
`500`	Internal Server Error

Example: cURL Request

curl -X POST https://integration.smartpng.com/api/compress \
  -F "api_key=your_api_key_here" \
  -F "file=@/path/to/image.png" \
  -F "compression_level=0.8" \
  -F "background_processing=false"

Limits

Maximum file size: 50 MB
Supported formats: PNG, JPEG, WebP
Credit cost: 1 credit per compression
Compression quality range: 0.0 - 1.0 (higher = better quality)