Bulk Image Compressor
Process and compress multiple images quickly directly in your browser.
Select multiple images
Original
Compressed Preview
Why Use a Bulk Compressor?
When dealing with huge galleries of raw photos, processing them one by one is a nightmare. Our bulk compression tool allows you to apply the same size reduction logic to dozens of files simultaneously, saving you hours of manual clicking.
How Browser-Based Bulk Processing Works
Unlike cloud tools that force you to wait for 50 images to upload (and often freeze halfway), ImageSlim uses your local CPU and RAM via WebAssembly and Canvas API. You simply select all your files, set your global compression slider, and the browser crunches through them instantly locally.
Frequently Asked Questions
How many photos can I compress at once?
Since processing happens locally, you can safely select up to 50-100 images at a time depending on your computer's RAM capability.
Is bulk compressing images safe for my computer?
Yes. Our tool processes images sequentially in your browser's memory, so it will not crash your operating system or upload files to a server.