The Same Codecs
as ImageOptim
Inside Your Browser
Image Optimiser
ImageOptim is the gold standard for image compression on macOS. MozJPEG for JPEG. OxiPNG for PNG. ImageQuant for lossy PNG. The best codecs, period.
We compiled them to WebAssembly and put them in your browser. Same algorithms. Same quality. No desktop app required.
Seven codecs. Six formats. Nothing leaves your machine.
Seven Codecs, Zero Uploads
World First Browser OS
Launch From Quick Launch
150+ Tools
Upload, Wait, Download, Repeat
The cloud compression cycle.
Open TinyPNG. Drag five images. Wait for the upload. Wait for the compression. Download each one. Open ShortPixel for the PNGs because TinyPNG’s PNG compression isn’t great. Upload again. Wait again.
Now do it for the 20 product images your client just sent.
Upload.
Wait.
Download.
Repeat.
Every online compressor works the same way: upload to their server, process remotely, send back. That’s bandwidth, latency, and a monthly cap on how many images you can process.
You don’t need a cloud service to make a JPEG smaller. The algorithms are open source. Your browser can run them directly.
Seven Codecs.
One Browser.
The same engines the pros use. Compiled to WebAssembly.
Image Optimiser doesn’t use canvas-quality browser encoding. It loads the same WebAssembly-compiled codecs that professional desktop tools use.
- MozJPEG → Mozilla’s optimised JPEG encoder. Trellis quantisation, progressive encoding.
- ImageQuant → Colour quantisation for lossy PNG. Reduces 24-bit PNG to an indexed palette.
- OxiPNG → Rust-based lossless PNG optimiser. Recompresses DEFLATE streams without quality loss.
- WebP → Google’s WebP encoder. Configurable method levels for speed vs compression tradeoff.
- AVIF → Next-gen format based on AV1. Best compression ratios available today.
- SVGO → Minifies SVG paths, removes metadata, multipass optimisation.
- Gifsicle → Frame-level GIF compression with colour reduction.
Every codec loads on demand. Compress only JPEGs? Only MozJPEG loads. No wasted memory.
Drop a Folder. Download a ZIP.
Batch processing with per-file controls.
Drag multiple files onto the drop zone. Image Optimiser processes them sequentially and shows results in a table with:
- Preview thumbnail → Draggable – drag directly into another app
- Original vs optimised size → Savings percentage per file
- Individual download → Or copy to clipboard per file
- Download All as ZIP → One click for the entire batch
Per-format quality sliders. Four optimisation levels. Metadata stripping. All settings persist between sessions.
The Math.
It Adds Up Fast.
What you’re probably paying now.
- TinyPNG Pro → $39/year. 10,000 compressions/year.
- ShortPixel → $4.99/month. 5,000 images/month.
- Imagify → $9.99/month. 20,000 images/month.
- Kraken.io → $5/month. 500MB/month.
Image Optimiser: included with SEO Time Machines. Unlimited compressions. No expiry. No bandwidth caps.
But the real cost isn’t the subscription. It’s uploading your client’s product images to a third-party server every time you need to compress them.
Image Optimiser Launch From Quick Launch
Type “ci” and hit Enter.
Press Ctrl+Shift+Space. Type “ci” (compress image). Hit Enter.
Image Optimiser opens in the side panel. Drag images in. Done.
Keywords that trigger it: ci, compress, image, optimize, webp, jpeg, png, mozjpeg.
Part of the
Design Toolkit
Tools that work together in the Design toolkit.
Love a website's colors? Extract the full palette. HEX, RGB, HSL. Copy any format instantly.
Design QA in the browser. Measure margins, paddings, gaps between any elements. Copy CSS variables with one click.
One click opens a responsive testing panel. Pick a device. See the exact viewport. Test instantly - and find elements breaking your layout.
Desktop: H1 at 48px. Body at 16px. Inter throughout. Looks perfect.Mobile: H1 is still 48px. Body text overflows. Font weights don't shift. Nobo.
Native browser eyedropper. Works on any website - and your desktop. Click rapidly without reloading. Saves up to 20 colors. HEX, RGB, HSL - all.
Found the perfect headline font? Hover and copy. Font name, weight, and styles in one tooltip.