Developers API - Smart Png Docs

Overview

SmartPNG Integration API is a synchronous image compression API designed for backend services, CMS plugins, and automation flows. It exposes three endpoints:

Endpoint	Method	Purpose
`/compress`	`POST`	Compress an uploaded image and return the optimized file as base64
`/validate`	`POST`	Validate an API key and return the current credit balance
`/health`	`GET`	Check service availability

Quick facts

Topic	Value
Base URL	`https://integration.smartpng.com/api`
Authentication	`api_key` passed in the request body or multipart form
File size limit	`10 MB` per file
Supported formats	`PNG`, `JPEG`, `WebP`, `AVIF`
Credit usage	`1` successful compression consumes `1` credit
Free usage	`500` free credits per account every month

Typical flow

Create a SmartPNG account and generate an API key from the dashboard.
Call POST /validate to confirm the key and available credits.
Call POST /compress with multipart/form-data.
Decode the returned compressed_data field and write it back to a file or upload target.

Website setup guides

Follow Get API Key to see the exact smartpng-vue website flow.
Follow Send Your First Request to validate a key and compress a file.

API reference

Start with API Overview.
Use the endpoint pages for request and response details: