
TinyPNG is an online image optimizer that reduces the file size of your PNG and JPEG images while preserving their quality. It uses clever lossy compression techniques to reduce the size of your photos, making them faster to load on your website or blog.
Pros
Simple and easy to use
Reduces image size without sacrificing quality
Batch processing available with paid plan
Cons
Only supports PNG and JPEG formats
File size limit of 5 MB for free plan
Batch processing only available with paid plan
Our overall rating:

Kraken.io is another online image optimizer that uses advanced compression algorithms to reduce the size of your images. It supports various image formats, including JPEG, PNG, GIF, and SVG.
Pros
Supports a wide range of image formats
Batch processing available with paid plan
Advanced optimization options for power users
Cons
Free plan has a file size limit of 1 MB
Batch processing only available with paid plan
More complex user interface than some other options
Our overall rating:

Compressor.io is a simple online image optimizer that supports JPEG, PNG, GIF, and SVG formats. It uses a combination of lossy and lossless compression techniques to reduce the size of your images.
Pros
Supports a wide range of image formats
Batch processing available with paid plan
Simple and easy to use
Cons
Free plan has a file size limit of 10 MB
Batch processing only available with paid plan
Not as powerful as some other options
Our overall rating:
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