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Kraken.io Image Optimizer

Cloud-based image compression and optimization for faster websites

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  • Overview
  • Features
  • Pricing
  • Pros
  • Cons
  • Reviews

Kraken.io Image Optimizer Overview

  • Updated March 8, 2026

Kraken.io Image Optimizer is a cloud-based image optimization software built to compress and resize images without noticeable quality loss. It supports JPG, PNG, WebP, GIF, SVG, AVIF, HEIC, and even PDF files.

With a web interface, full API access, and official WordPress and Magento plugins, Kraken.io helps developers and site owners reduce file sizes, speed up load times, and lower bandwidth costs.

Key Features

  • Lossy & Lossless Compression: Choose between maximum file size reduction or pixel-perfect quality preservation depending on project needs.
  • Wide Format Support: Optimize JPG, PNG, WebP, GIF, SVG, AVIF, HEIC, and PDF files from a single platform.
  • Powerful REST API: Automate image optimization directly within apps, workflows, and CMS platforms.
  • Web Interface PRO: Drag-and-drop interface for manual uploads, bulk optimization, and quick downloads.
  • Image Resizing & Scaling: Resize images during optimization to generate device-specific versions for mobile and tablet delivery.
  • WordPress & Magento Plugins: Official plugins enable automatic optimization on upload and bulk optimization of existing media libraries.
  • Cloud-Based Processing: Offloads compression tasks to Kraken.io’s servers, reducing strain on local hosting resources.
  • Bulk Optimization: Compress multiple images at once for faster workflow in large content libraries.
  • Flexible Tiered Pricing: Free plan with 100MB testing quota plus scalable paid plans based on monthly image volume.

Price

Plan Price Key Features
Free Account $0 100 MB testing quota, API Sandbox access, No credit card required
Micro $50/yr (Billed Annually) / $5/mo (Billed Monthly) 500 MB images per month, $5 per additional GB, Full API Access
Basic $90/yr (Billed Annually) / $9/mo (Billed Monthly) 2 GB images per month, $4 per additional GB, Web Interface PRO
Advanced $190/yr (Billed Annually) / $19/mo (Billed Monthly) 5 GB images per month, $3 per additional GB, WordPress & Magento plugins
Premium $390/yr (Billed Annually) / $39/mo (Billed Monthly) 15 GB images per month, $2 per additional GB, Kraken.io Cloud Storage
Enterprise $790/yr (Billed Annually) / $79/mo (Billed Monthly) 60 GB images per month, $1 per additional GB, Full API Access

Price details: https://kraken.io/pricing

Pros

Competitor

Pros
TinyPNG Kraken.io supports more formats including AVIF, HEIC, SVG, and PDF, while TinyPNG focuses mainly on PNG and JPG. It also offers a full-featured API and built-in resizing options, making it more flexible for developers who need automated workflows beyond simple drag-and-drop compression.
ShortPixel Kraken.io provides clearer bandwidth-based pricing tiers and a generous 100MB free testing quota without requiring a credit card. Its standalone web interface and API feel more developer-focused, especially for teams integrating optimization into custom applications.
Imagify Kraken.io goes beyond WordPress by offering a robust API and Magento extension, making it suitable for broader web projects. The cloud-based processing reduces server load, which can benefit sites hosted on limited shared environments.
EWWW Image Optimizer Unlike server-based optimization tools, Kraken.io handles compression entirely in the cloud, reducing CPU strain and potential slowdowns on hosting environments. This makes it appealing for high-traffic websites or applications where server performance is critical.
Squoosh Kraken.io offers automation through its API and CMS plugins, while Squoosh is primarily manual and browser-based. For businesses managing thousands of images, Kraken.io’s batch processing and integration capabilities provide better long-term scalability.

Cons

Competitor

Cons
TinyPNG TinyPNG offers a very simple interface and predictable per-image pricing, which may feel easier for small projects. Kraken.io’s bandwidth-based tiers can require closer monitoring, especially for users who occasionally exceed monthly quotas and face additional per-GB charges.
ShortPixel ShortPixel includes WebP and AVIF conversion features tightly integrated into WordPress workflows. Kraken.io, while flexible, may require more manual configuration for format conversion and advanced CMS-specific optimizations.
Imagify Imagify integrates deeply with WordPress dashboards and offers a smoother experience for non-technical users. Kraken.io’s interface and API orientation may feel more developer-centric and less guided for beginners.
EWWW Image Optimizer EWWW allows local optimization without relying on external servers, which can appeal to privacy-conscious users. Kraken.io processes files in the cloud, meaning users must upload images externally, which may not suit highly restricted environments.
Cloudinary Cloudinary bundles image optimization with advanced media management, CDN delivery, and real-time transformations. Kraken.io focuses mainly on compression and resizing, so teams needing a full digital asset management and delivery stack may find it more limited.

Verified Customer Reviews

  • Trustpilot Review (Rating: 1.7/5): One reviewer said the app “doesn’t work properly” and felt disappointed after their Basic plan exceeded its limit, saying they had high hopes for a European image optimization product but ran into issues instead.
  • G2 Review (Rating: 7/10): A marketing agency highlighted how Kraken.io Image Optimizer automates the entire image upload process and improves loading speed without any noticeable loss in quality. Another user said the “web interface pro is very easy to use” and liked seeing image and file features directly in the dashboard instead of checking them later in Photoshop.
  • wordpress.org Review: Review threads range from “Fantastic Compression” and “Works great and excellent support” to complaints like “No support at all, broken plugin” and “Does not work for bulk actions, subscription cannot be cancelled,” showing both strong praise and sharp frustration in the Kraken.io Image Optimizer community.
  • SourceForge Review (Rating: 5/5): A data analyst who used Kraken weekly for 6–12 months said it “effectively reduces the size and decreases loading time” and called it “very easy and hassle-free to deploy.” In the overall comments, Kraken earned praise as “an excellent web image optimizer” that helped speed up their website.
  • SaaSworthy Review (Rating: 2.1/5): The summary notes mixed feedback, with some users praising its ease of use, speed, and ability to compress images without sacrificing quality, while the low overall score suggests others felt less satisfied with the experience.