Compare the Top Free Image Processing API as of July 2025

What is Free Image Processing API?

An image processing API is an API that can be used by developers to add image processing capabilities to applications. Image processing APIs can be used to build features into applications such as image cleanup, OCR, image conversion, image compression, computer vision, image editing, and more. Compare and read user reviews of the best Free Image Processing API currently available using the table below. This list is updated regularly.

  • 1
    Sirv

    Sirv

    Sirv

    Image CDN for resizing and optimizing your images for extremely fast delivery. Sirv automatically detects the most optimal image dimensions, resolution and format for each user. Automatic format conversion, so your website serves the best next-gen image formats such as WebP, instead of PNG of JPEG. Entirely automated and relied upon by over 30,000 businesses for the best possible image optimisation. Easily organise, search and tag your images in Sirv's digital asset management (DAM) service at https://my.sirv.com. It's a pleasure to use - fast and simple. Create your free trial now and start benefiting from the fastest image CDN service of them all.
    Starting Price: $19/month
  • 2
    scikit-image

    scikit-image

    scikit-image

    scikit-image is a collection of algorithms for image processing. It is available free of charge and free of restriction. We pride ourselves on high-quality, peer-reviewed code, written by an active community of volunteers. scikit-image provides a versatile set of image processing routines in Python. This library is developed by its community, and contributions are most welcome! scikit-image aims to be the reference library for scientific image analysis in Python. We accomplish this by being easy to use and install. We are careful in taking on new dependencies, and sometimes cull existing ones, or make them optional. All functions in our API have thorough docstrings clarifying expected inputs and outputs. Conceptually identical arguments have the same name and position in a function signature. Test coverage is close to 100% and code is reviewed by at least two core developers before being included in the library.
    Starting Price: Free
  • 3
    Blitline

    Blitline

    Blitline

    Spend less & scale your apps with ease with Blitline’s Image Processing-as-a-Service (IPaaS). Blitline provides the most affordable Image Processing as a Service (IPaaS) solution for media and software companies that need bulk image and media processing at scale. From digital asset management (DAM) platforms and content management systems (CMS) to digital education sites and online marketplaces, the Blitline JSON API is a better alternative to Open Source solutions that bottleneck user experience innovations and expensive outsourced services that charge by the gigabyte and are primarily geared towards image and video formats only. Get started with the Blitline today for an all-in-one enterprise solution that will boost your secure media processing performance and lower your total cost of ownership. Massive. We maintain a cluster of machines as big as anyone. Always on demand. Smart. We were the first to market in 2011 and have been growing ever since.
    Starting Price: $9 per month
  • 4
    Pillow

    Pillow

    Pillow

    The Python Imaging Library adds image processing capabilities to your Python interpreter. This library provides extensive file format support, an efficient internal representation, and fairly powerful image processing capabilities. The core image library is designed for fast access to data stored in a few basic pixel formats. It should provide a solid foundation for a general image processing tool. Pillow for enterprise is available via the Tidelift subscription. The Python Imaging Library is ideal for image archival and batch processing applications. You can use the library to create thumbnails, convert between file formats, print images, etc. The current version identifies and reads a large number of formats. Write support is intentionally restricted to the most commonly used interchange and presentation formats. The library contains basic image processing functionality, including point operations, filtering with a set of built-in convolution kernels, and color space conversions.
    Starting Price: Free
  • 5
    Insight Toolkit (ITK)
    Welcome to the Insight Toolkit (ITK). ITK is an open-source, cross-platform library that provides developers with an extensive suite of software tools for image analysis. Developed through extreme programming methodologies, ITK builds on a proven, spatially-oriented architecture for processing, segmentation, and registration of scientific images in two, three, or more dimensions. Establish a foundation for future, reproducible research. Create a repository of fundamental algorithms. Develop a platform for advanced product development. Support commercial application of the technology. Create conventions for future work. Support education in scientific image analysis. Grow a self-sustaining community of software users and developers. ITK is one of the largest and earliest open source projects within the scientific community. We set out to build a great image analysis tool that serves a broad range of applications and environments.
    Starting Price: Free
  • 6
    OneSimpleApi

    OneSimpleApi

    OneSimpleApi

    A toolbox with all the things you need to get your project to success: Image resize and CDN, PDF and Screenshots generation, Currency Exchange and Discounts, Email Validation, QR codes, and much more! Our color generator allows you to create a unique color based on a text, transform colors between HEX, RGB and HSL, and obtain Color palettes based on an initial color, or text! Image manipulation doesn't have to be hard. This API makes it super simple to adapt your images and then deliver them using a Content Delivery Network. Calculate readability scores, reading time estimates and sentiment scores with ease for all your texts. Generate perfect QR codes images or vectors. 100% customizable and effortless. Use it to promote an event, give a discount, or share a link. Obtain a Spotify Profile details, including their name, followers, popularity, picture, monthly listeners, biography, social media links, top songs, and top listeners locations.
    Starting Price: $19 per month
  • 7
    SceneXplain

    SceneXplain

    SceneXplain

    Welcome to SceneXplain, your gateway to revealing the rich narratives hidden within your images. Our cutting-edge AI technology dives deep into every detail, generating sophisticated textual descriptions that breathe life into your visuals. With a user-friendly interface and seamless API integration, SceneXplain empowers developers to effortlessly incorporate our advanced service into their multimodal applications. Bid farewell to uninspired image captions. SceneXplain harnesses the power of state-of-the-art large models and language models to explain the intricate stories beyond the pixels, transcending the limitations of conventional captioning algorithms. Trust in SceneXplain to deliver an engaging, concise, and professional image storytelling experience.
    Starting Price: $9.99 per month
  • 8
    imagor

    imagor

    cshum

    Imagor is a fast, secure image processing server and Go library, utilizing one of the most efficient image processing libraries, libvips. It supports a wide range of image operations, including resizing, cropping, rotating, flipping, and applying filters. Imagor is designed to be stateless and can be easily deployed using Docker. It supports various storage backends such as HTTP, AWS S3, Google Cloud Storage, and the local filesystem. The server is highly configurable, allowing users to define loaders, storages, and processors to suit their specific needs. Imagor also provides support for URL-safe image operations, enabling on-the-fly image transformations through URL parameters. Security features include HMAC-based URL signing to prevent unauthorized access. It is extensible, with support for custom filters and processors. For video thumbnail generation, Imagor integrates with ffmpeg through the imagorvideo extension, allowing the extraction of video frames.
    Starting Price: Free
  • 9
    Imagga

    Imagga

    Imagga

    Build the next generation of Image Recognition Applications with Imagga's API. Empowering intelligent apps with our customizable machine learning technology. Automatically assign tags to your images. Powerful API for image analysis and discovery. Empower product discoverability in your application. Powerful API for building visual search capabilities. Unlock facial recognition in your applications. Powerful API for building face recognition. Train our image A.I. to better organize your photos in your own list of categories. Automatically categorize your image content. Powerful API for instant image classification. Automated adult image content moderation trained on state of the art image recognition technology. Automatically generate beautiful thumbnails. Powerful API for content-aware cropping. Let colors bring meaning to your product's photos. Powerful API for color extraction.
    Starting Price: $79 per month
  • 10
    Amazon Rekognition
    Amazon Rekognition makes it easy to add image and video analysis to your applications using proven, highly scalable, deep learning technology that requires no machine learning expertise to use. With Amazon Rekognition, you can identify objects, people, text, scenes, and activities in images and videos, as well as detect any inappropriate content. Amazon Rekognition also provides highly accurate facial analysis and facial search capabilities that you can use to detect, analyze, and compare faces for a wide variety of user verification, people counting, and public safety use cases. With Amazon Rekognition Custom Labels, you can identify the objects and scenes in images that are specific to your business needs. For example, you can build a model to classify specific machine parts on your assembly line or to detect unhealthy plants. Amazon Rekognition Custom Labels takes care of the heavy lifting of model development for you, so no machine learning experience is required.
  • 11
    imgix

    imgix

    Zebrafish Labs

    Powerful image processing, simple API, imgix transforms, optimizes, and intelligently caches your entire image library for fast websites and apps using simple and robust URL parameters. We don’t charge to create variations of your Master Images. You can be as creative with the service as possible. Over 100 real-time image operations, plus client libraries and CMS plugins for easy integrations with your product. Serve optimized images to every device quickly with a worldwide CDN optimized for visual content. Browse, search, sort, and organize all of your cloud storage images. Resize, crop, and enhance your images with simple URL parameters. Intelligent, automated compression that eliminates unnecessary bytes. Customers see images fast thanks to imgix's caching and global CDN. Introducing imgix Image Management. ​​Transform your cloud bucket into a sophisticated platform that allows you to finally see what your images can do for you.
    Starting Price: Free
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