Compressor.io compresses images through its service: its drop zone states a 10 MB maximum and reserves compression options behind a PRO tier. A browser-based image compressor re-encodes the picture on your own device instead, with no size cap and nothing uploaded.
Compressor.io is a clean image compressor, but its own drop zone states a 10 MB maximum per image and marks its compression types as PRO ONLY, with a paid plan behind them. A client-side compressor does the same core job, re-encoding a JPEG, PNG or WebP to a smaller size, entirely inside your browser, so the picture is never uploaded and the only size limit is your own device memory.
Local compression is the better fit when the image is private, when a file is larger than a fixed upload cap, or when you would rather not create an account for a basic task. You control the quality level and can see the before and after size, compressing as many images as you like with nothing metered and nothing sent to a server.
No plan-based cap. Because compression runs locally, size is bounded only by your device memory.
No. The picture is compressed in your browser and never sent to a server.
No. Every option is free with no account and no PRO upgrade.