Compress and convert images to WebP/AVIF in your browser, no account needed. The Image Optimizer offers a free web tool plus a WordPress plugin from $7/mo.
Category
SEO
Pricing
Freemium (free browser tool + 50 free signup credits, then usage-based credit plans starting at $7/mo), from $7/ mo
Verified
Not yet
Last updated
August 7, 2026
WordPress IntegrationBrowser Based
The Image Optimizer, built by UK web agency NerdCow, is a standalone image compression product offered both as a free browser-based web app and as a paid WordPress plugin. Users can upload images directly in the browser without creating an account; the service compresses and converts them to modern formats such as WebP and AVIF, automatically choosing the best format for each image. NerdCow states that uploaded images are never stored on its servers. For WordPress sites and higher-volume use, The Image Optimizer sells credit-based paid plans (Standard and Agency) plus a pay-as-you-go option, accessed via a license key rather than a traditional user account. The Agency plan adds multi-site license-key management, per-site usage tracking, and consolidated billing, positioning the product for web agencies managing image optimization across multiple client sites in addition to individual website owners.
Key Features
No-account browser upload — Upload and compress an unoptimized image directly in the browser with no sign-up required.
Images never stored — NerdCow states that uploaded images are never stored on The Image Optimizer's servers.
Automatic WebP/AVIF conversion — Automatically detects and converts images to efficient modern formats such as WebP and AVIF alongside standard PNG/JPEG.
WordPress plugin — An official WordPress plugin, available via the WordPress plugin repository, brings the same optimization to WordPress sites.
License-key dashboard — Paid usage is managed through a dashboard accessed via a license key rather than a traditional account login, showing credit balance and top-ups.
Agency multi-site management — The Agency plan adds multi-license key management, per-site usage tracking, and consolidated billing for managing image optimization across multiple client sites.
Pay-as-you-go credits — Credits can be purchased on a pay-as-you-go basis at $0.02/credit and never expire, in addition to the monthly Standard and Agency plans.
Pros & Cons
Pros
No account required to use the standalone web-based image compressor
States that uploaded images are never stored on its servers
Pay-as-you-go credits never expire, alongside monthly Standard/Agency plans
Dedicated Agency plan with multi-license management and consolidated billing for agencies managing several sites
Automatically converts images to modern WebP/AVIF formats
Cons
Paid use of the WordPress plugin and higher-volume compression relies on a credit-based license system rather than a flat subscription
Specific compression algorithm and quality-level details are not published on the site
No manual control over compression level is mentioned — format/quality selection is automatic