ReSmush.it

API

Free REST API for photo optimization and compression

Overview

ReSmush.it API provides RESTful endpoints for lossless and lossy image compression. Its primary POST endpoint (/ws.php) accepts image uploads via file or URL, with optional parameters to adjust compression levels. Responses are in JSON, including optimized image data (base64 or URL), compression ratio, original/optimized sizes, and status. Ideal for web developers integrating image optimization into CMS platforms (WordPress, Drupal), e-commerce sites, or mobile apps to reduce image file sizes, improve page load speeds, and save bandwidth without significant quality loss.

Example Integration (JavaScript)

script.js JS


fetch('https://resmush.it/api')
  .then(res => res.json())
  .then(data => console.log(data))
  .catch(err => console.error(err));

Key Features

RESTful API
JSON Response Format
Accepts Image Uploads (File/URL)
Lossless & Lossy Compression Options
No API Key Required
Supports JPEG, PNG, GIF, BMP Formats

Frequently Asked Questions

? Is ReSmush.it API free to use?

Yes, the core API functionality is free with rate limits (100 images per hour) and a max image size of 5MB. Paid tiers may be available for higher limits and advanced features.

? Does it require an API Key?

No, the ReSmush.it API does not require an API key for basic usage. You can start using it immediately with valid POST requests to the /ws.php endpoint.

? What is the response format?

The API returns responses in JSON format, including details like the optimized image URL or base64 data, compression ratio, original and optimized file sizes, and a success status indicator.

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Tool Info

Pricing Freemium

Category Photography

Platform Public API

Pros

⊕ Easy to integrate (simple POST requests)
⊕ Free core functionality
⊕ High compression efficiency (up to 80% reduction)
⊕ Fast processing times

Cons

⊖ Rate-limited (100 images/hour for free tier)
⊖ Max image size cap (5MB for free)
⊖ No official SLA for free usage
⊖ Limited advanced compression controls