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ImageOptim API

ImageOptim API is a web service for image compression, resizing, and optimization, enabling faster page load times and improved SEO.

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Introduction

ImageOptim API is a web service designed for image optimization and resizing. It allows developers to easily integrate image compression and manipulation into their web applications and e-commerce sites. Key features include:

  • Image Resizing on Demand: Create responsive images and thumbnails optimized for various devices.
  • Advanced Compression: Utilizes custom encoders and adjusts compression parameters for each image.
  • Color Profile and Gamma Support: Applies ICC color profiles and resizes in gamma-corrected 48-bit depth for professional quality.
  • High-DPI Optimization: Tuned compression for high-density displays to reduce file sizes.
  • Privacy Protection: Removes hidden metadata like GPS position and camera serial numbers.
  • Security: Isolates servers from image processing vulnerabilities.
  • Progressive Rendering: Enables faster perceived loading times.

Use cases include optimizing product photos for e-commerce, compressing user-uploaded images, and adding responsive images to web applications and CMS platforms. It helps improve website performance, increase conversions, and enhance SEO.

Latest News

ImageOptim — what has changed in the latest version

ImageOptim — what has changed in the latest version

8/5/2026

Fixed handling of relative paths when launched from CLI; Switched to newer API s for path & file handling and simplified code for handling parallel queues

ImageOptim — better Save for Web

ImageOptim — better Save for Web

8/5/2026

You can donate to support the project. ## Subscribe to an occasional newsletter Pro tips about ImageOptim, gif.ski and image formats in general. News about upcoming features and access to preview versions of apps I develop. Your e-mail address: Created by Kornel Lesiński. Contact. Follow on Mastodon...

Integration via GET URLs — ImageOptim API Documentation

Integration via GET URLs — ImageOptim API Documentation

8/5/2026

You can serve resized images without storing them on your server. Prefix your images' URL s with ImageOptim API URL , and you'll get resized and optimized

ImageOptim — better Save for Web

ImageOptim — better Save for Web

8/5/2026

By default ImageOptim is very cautious and exactly preserves image quality, but if you allow it to change the quality — even only a little — it will be free to use much more aggressive optimizations that give the biggest results. You can configure lossy optimizations in ImageOptim's `Preferences`. I...

Uploading — ImageOptim API Documentation

Uploading — ImageOptim API Documentation

8/5/2026

Optimizing local images. If the image you want to optimize ・ you can POST the image file to the API instead. Files are sent ・ are not hosted on ImageOptim

Alternatives

  • Cloudinary

    Cloudinary offers a complete cloud-based solution for image and video management, including advanced optimization, transformation, and delivery.

  • Imgix

    Imgix provides real-time image optimization, resizing, and manipulation through a powerful API and CDN, similar to ImageOptim API's core features.

  • TinyPNG/TinyJPG

    TinyPNG/TinyJPG specializes in highly effective lossy compression for PNG and JPEG images, offering a simple API for integration.

  • ShortPixel

    ShortPixel delivers advanced image optimization for websites, including a WordPress plugin and API, supporting various image formats and compression levels.

  • Kraken.io

    Kraken.io offers a robust image optimization and resizing API, providing both lossy and lossless compression for various image types.

  • Optimole

    Optimole is an all-in-one image optimization solution for WordPress, automatically optimizing and serving images from a CDN.

  • EWWW Image Optimizer

    EWWW Image Optimizer is a popular WordPress plugin that automatically optimizes images as they are uploaded, with options for various compression methods.

  • Squoosh

    Squoosh is a free and open-source web app by Google that allows users to compress and compare images with various codecs and settings directly in the browser.

  • Gumlet

    Gumlet provides automated image optimization, resizing, and delivery with a global CDN, focusing on performance and user experience.

  • Sirv

    Sirv offers a comprehensive image CDN, resizing, and optimization service, ensuring fast loading and high-quality visuals across devices.

FAQ

User Reviews

4.0/5.0
(8reviews)
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Pricing

Pricing Model: Free

ImageOptim

Free and open-source image optimization app for macOS

Free
one-time

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