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Vendor meekmedia
Package image-optimizer
Short Description Private, client-side image compression widget for any PHP site. MozJPEG, WebP and OxiPNG via WebAssembly - images never leave the visitor's browser.
License Apache-2.0

Keywords image compression browser optimizer client-side MozJPEG Webp wasm oxipng

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Informations about the package image-optimizer

Image Optimizer

Private, client-side image compression for any PHP site. Drop in a widget that compresses JPEG, PNG and WebP in the visitor's browser with the same WebAssembly codecs used by Google's Squoosh app (MozJPEG, libwebp, OxiPNG) - images never touch your server, so it works on the cheapest shared hosting and scales for free.

Built by Meek Media.

Why

Private: files never leave the browser. No uploads, no storage, no GDPR surface.
Real codecs: MozJPEG / WebP / OxiPNG via WASM - visibly better than canvas.toBlob.
Live: dragging the quality slider or switching format re-compresses already-added images in place, sizes updating in real time.
Server-proof: your PHP just prints markup and serves static files. No extensions, no binaries, no upload_max_filesize, no queue.
Graceful: if WASM can't load, it silently falls back to the browser's canvas encoder.

Install

Composer

No Composer? Download the release zip, unzip it anywhere PHP can read, and require '<path>/image-optimizer/autoload.php';.

Quick start

Publish the static assets into your public web root:
Render the widget:

That's it. See examples/plain-php/ for a runnable page.

Upgrading

After updating the package (Composer or the release zip), re-run the publish step so the new static assets land in your public web root:

Asset URLs are version-busted (?v=...), so browsers and CDNs with long-lived cache headers pick up the republished files automatically - no manual cache purge needed.

Options (render config)

Key	Default	Meaning
`formats`	`['webp','mozjpeg','oxipng']`	Formats offered in the select. `'auto'` keeps each image's own format.
`defaultFormat`	`'webp'`	Pre-selected format.
`quality`	`80`	1-100. Ignored by OxiPNG (lossless).
`resize`	`false`	Show a max-dimension input (fit-within, never upscales).
`maxFiles`	`20`	Batch limit per drop.

Advanced (JS-only, via MeekImageOptimizer.mount(el, options)): strings to override every UI string, and onFileComplete / onBatchComplete / onError callbacks. A headless API is also exposed: MeekImageOptimizer.create({assetsBase}).then(o => o.compress(file, opts)).

Notes

v1 limitation: render() (and the widget it mounts) supports only one instance per page - rendering it more than once on the same page isn't supported yet.

Theming

The widget is styled entirely through CSS custom properties - set them on .mio-root:

Dark mode: redefine the same variables under your dark scope (e.g. .dark .mio-root { ... }).

Server notes

Serve .wasm with the right MIME type (the widget copes either way, but streaming compilation is faster). Apache/.htaccess:
All codecs are single-threaded WASM: no COOP/COEP headers are needed.
Images above 24 megapixels are rejected client-side (mobile Safari canvas limits).

Browser support

Evergreen Chrome, Edge, Firefox, Safari (incl. iOS). Older browsers get the canvas fallback automatically.

Attribution & license

Apache-2.0. Bundles WebAssembly codecs from jSquash, derived from Google's Squoosh (both Apache-2.0) - "Squoosh" is used for attribution only; this project is not affiliated with Google. ZIP support by fflate (MIT). See THIRD_PARTY_NOTICES.md.

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Package Version

Version v1.1.0 Release 01. Sep 2026
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