S3 Image Optimizer WordPress Plugin

Name: S3 Image Optimizer
Availability: InStock
Rating: 5 (1 reviews)
Author: Shane Bishop

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Vulnerabilities

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No known vulnerabilities

This plugin has no records in the Wordfence Intelligence vulnerability database.

About S3 Image Optimizer

Compress images in Amazon S3 buckets using lossless and lossy optimization methods via the EWWW Image Optimizer.

The S3 Image Optimizer will optimize all your images in 1-1,000+ Amazon S3 buckets using the EWWW Image Optimizer. Since EWWW IO integrates directly with plugins like WP Offload Media, S3 IO is generally for folks who use a solution other than WP Offload Media to put their images on S3. But, if you have 20 sites sharing an S3 bucket, or have lots of buckets, and you would want to optimize them all from one place instead of 20 different sites, this is the plugin for you.

S3 IO features a web-based bulk optimization process, and a WP-CLI interface for massive buckets. S3 IO works with any S3-compatible storage service including Linode, Backblaze B2 and Digital Ocean Spaces.

You may report security issues through our Patchstack Vulnerability Disclosure Program. The Patchstack team helps validate, triage and handle any security vulnerabilities. Report a security vulnerability.

Credits

Written by Shane Bishop with special thanks to my Lord and Savior.

Frequently Asked Questions

What happens if I have so many images that the S3 Bulk Optimizer keeps timing out?

If you have configured S3 IO to optimize all your buckets, try a single bucket to see if that will work. If that still doesn’t work, use the S3_IMAGE_OPTIMIZER_FOLDER setting above to restrict optimization to a specific folder. This way you can optimize a single bucket by configuring each folder within the bucket, running the S3 Bulk Optimizer, and then moving to the next folder.

If the last option has you groaning, see if your web host supports WP-CLI. Using WP-CLI allows you to avoid any timeouts, and solves a whole host of issues with long-running processes. The wp-cli help s3io optimize command should get you going.

If you’ve tried everything, and WP-CLI isn’t an option with your web host, find a web host that DOES support WP-CLI. It’s pretty easy to find a cheap host that supports WP-CLI, like GoDaddy. While I wouldn’t recommend GoDaddy for hosting, if you want a cheap solution to run WP-CLI, it works. Remember that S3 IO is site agnostic, so you can run it from a site completely separate from the site(s) that your S3 images belong to. You could also fire up a Digital Ocean droplet with WordPress pre-installed for $5 and put WP-CLI on there. When you’re done, you can make a backup image of the droplet and destroy it so that you aren’t paying for usage all the time.

What about X, or Y, or maybe even Z?

Most problems we’ve seen are either permissions-related, or covered by the timeout stuff above. If you have a question, shoot us an email!

Ratings & Reviews

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Changelog

3.0.1

Release Date – July 29, 2026

updated: AWS SDK to latest version
fixed: styling of page numbers on bulk results
fixed: previous/first buttons disabled incorrectly during bulk operation
fixed: use WP_Filesystem instead of direct PHP filesystem calls where possible

3.0.0

Release Date – March 4, 2026

added: support for optimizing WebP image uploads
added: support for WebP naming mode in EWWW Image Optimizer
added: utility for migrating between WebP naming modes
added: utility to remove all WebP image copies from S3
added: option to force re-optimization of previously optimized images
added: option to only generate WebP images
improve: optimize by URL handles path-style URLs and 404 errors better
changed: bulk optimizer results consolidated with image table for less memory usage and simpler navigation
changed: AWS exception handling catches more errors and is more readable
updated: AWS SDK to latest version
fixed: duplicate records created when size of object in bucket changes
fixed: uncaught PHP exception when checking ownership controls on older buckets where policy is not explicitly set
fixed: multiple strings missing i18n
fixed: undefined variables in exception handlers
fixed: some strings missing i18n
fixed: malformed AJAX responses not handled properly during bulk optimization
security: missing some capability checks

2.6.1

Release Date – August 15, 2024

added: override auto-detected object ownership enforcement via S3IO_OBJECT_OWNERSHIP_ENFORCED constant or s3io_object_ownership_enforced filter: set either to true to disable per-object acls
fixed: optimize by URL incorrectly overwrites previous optimization results if multiple buckets have objects with identical paths

2.6.0

Release Date – August 1, 2024

added: support for buckets with object ownership enforced
added: force usage of path-style endpoint with S3_IMAGE_OPTIMIZER_PATH_STYLE
changed: improved error handling for optimize by URL
changed: bumped minimum WP and PHP versions
fixed: malformed image size information in optimization table

2.5.1

Release Date – September 20, 2023

changed: use updated WP coding standards
changed: cleanup AWS SDK folder

2.5.0

Release Date – June 22, 2023

added: compatibility with EWWW Image Optimizer 7+ and better future-proofing to detect compatibility errors
updated: AWS SDK to latest version
updated: improved PHP 8.2 compatibility, though there are still (non-critical) deprecation notices from the AWS SDK

2.4.3

Release Date – November 10, 2022

changed: display the values of any constants defined for endpoint, region, or folder restriction
fixed: check if the bucket list is an array before sanitizing

2.4.2

Release Date – October 5, 2022

added: define custom endpoint for any S3-compatible storage via S3_IMAGE_OPTIMIZER_ENDPOINT
fixed: cleanup of WebP copies using incorrect path

2.4.1

Release Date – June 21, 2022

fixed: PHP notice when updating db records
removed EDD_SL_Updater file/class

2.4.0

Release Date – June 17, 2021

fixed: failure in creating s3io/ working directory silently breaks bulk tools
fixed: sanitation for error messages was too aggressive
fixed: listBuckets error displayed even when S3_IMAGE_OPTIMIZER_BUCKET is defined

2.3

Release Date – November 24, 2020

fixed: conflict getting local uploads directory when S3 Uploads plugin is active

2.2

Release Date – August 13, 2020

added: generate and upload WebP version of your images in accordance with EWWW IO settings (WebP Conversion and Force WebP)
fixed bulk toggle-arrow styling
additional sanitizing and escaping for better security