100% IN-MEMORY PHP GD ZERO SERVER IMAGE STORAGE 1-SITE DOMAIN LOCK ENFORCEMENT

REST API for WooCommerce & WebP Optimization

Stateless, high-efficiency PHP REST API that converts uploaded raster images directly in RAM. Zero database queries on media conversion, zero disk writes, and locked to 1 single verified website domain.

POST https://webpconverter.tech/api/convert.php

Commercial API & WordPress Plugin Access

The Webp Converter REST API and WordPress Plugin require an active $49 Lifetime Single-Site License. Each key is permanently locked to 1 website.

Conversion Parameters Live Stream

Drop Image or Click to Browse

Supports JPG, PNG, WEBP, AVIF, BMP

Single-Site API Key *

An active single-site API key is required to convert images through the API.

Target Output Format

Encoding Quality 85%

Max Width (Constraint)

Live Response Ready

Select an image on the left and click Send API Request to preview output.

Response Headers & Diagnostics

// Click "Send API Request" to view live response headers.

WooCommerce Auto-WebP Optimization Hook

Add this code to your active WordPress theme's functions.php or custom plugin

Every time a product or media image is uploaded to your WooCommerce store, this hook intercepts the upload, streams it to your Webp Converter REST API in RAM, and saves the WebP version automatically.

<?php
/**
 * Auto Convert WooCommerce Image Uploads to WebP via Webp Converter API
 * Add this code to your child theme's functions.php
 */
add_filter('wp_handle_upload', function($upload) {
    if (empty($upload['file']) || !empty($upload['error'])) {
        return $upload;
    }

    $mime = $upload['type'] ?? '';
    // Only convert raster JPG and PNG images
    if (!in_array($mime, ['image/jpeg', 'image/png'], true)) {
        return $upload;
    }

    $filePath = $upload['file'];
    if (!file_exists($filePath)) {
        return $upload;
    }

    // Your Webp Converter API Endpoint & $49 Lifetime Key
    $apiEndpoint = 'https://webpconverter.tech/api/convert.php';
    $apiKey      = 'CZ-YOUR-API-KEY';

    $cFile = new CURLFile($filePath, $mime, basename($filePath));
    $ch    = curl_init($apiEndpoint);

    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_POST, true);
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
    curl_setopt($ch, CURLOPT_HTTPHEADER, [
        'X-API-Key: ' . $apiKey,
    ]);
    curl_setopt($ch, CURLOPT_POSTFIELDS, [
        'image'         => $cFile,
        'format'        => 'webp',
        'quality'       => 85,
        'response_type' => 'binary',
        'site_url'      => home_url()
    ]);
    curl_setopt($ch, CURLOPT_TIMEOUT, 30);

    $webpData = curl_exec($ch);
    $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
    curl_close($ch);

    if ($httpCode === 200 && !empty($webpData)) {
        $webpPath = preg_replace('/\.(jpe?g|png)$/i', '.webp', $filePath);
        if (file_put_contents($webpPath, $webpData)) {
            // Remove original image to save disk space
            @unlink($filePath);
            $upload['file'] = $webpPath;
            $upload['url']  = preg_replace('/\.(jpe?g|png)$/i', '.webp', $upload['url']);
            $upload['type'] = 'image/webp';
        }
    }

    return $upload;
}, 10, 1);

cURL Command Line

curl -X POST "https://webpconverter.tech/api/convert.php" \
  -H "X-API-Key: CZ-YOUR-API-KEY" \
  -F "image=@photo.jpg" \
  -F "format=webp" \
  -F "quality=85" \
  --output photo.webp

Python Requests

import requests

url = "https://webpconverter.tech/api/convert.php"
headers = {"X-API-Key": "CZ-YOUR-API-KEY"}
files = {"image": open("banner.png", "rb")}
data = {"format": "webp", "quality": 85}

response = requests.post(url, headers=headers, files=files, data=data)

if response.status_code == 200:
    with open("banner.webp", "wb") as f:
        f.write(response.content)
    print("Successfully converted image to WebP!")
else:
    print("Error:", response.json())

Node.js (Axios & FormData)

const axios = require('axios');
const FormData = require('form-data');
const fs = require('fs');

const form = new FormData();
form.append('image', fs.createReadStream('banner.jpg'));
form.append('format', 'webp');
form.append('quality', 85);

axios.post('https://webpconverter.tech/api/convert.php', form, {
    headers: {
        ...form.getHeaders(),
        'X-API-Key': 'CZ-YOUR-API-KEY'
    },
    responseType: 'arraybuffer'
}).then(res => {
    fs.writeFileSync('banner.webp', res.data);
    console.log('Saved converted WebP successfully!');
}).catch(err => {
    console.error('API Error:', err.message);
});