Batch background removal, free

ClipBrook cuts the background out of a whole folder at once. Drop the folder in, and download a ZIP of full-size transparent PNGs. There is no account, no credit balance, no watermark and no cap on how many files you give it.

One condition decides whether this page is for you: the images have to be renders made on a flat key color, the kind the prompt guide shows you how to generate. ClipBrook is a chroma keyer, and a photo gives it nothing to key.

Why it costs nothing to run

Every image a hosted remover handles runs on a GPU somebody is renting, so the price follows the cost: free tiers watermark the output or shrink it, and real use is sold in credits.

ClipBrook’s costs are different. The site is a set of static files, and the cutting happens in worker threads on your own computer. Image number four hundred costs the site exactly what image number one cost, which is nothing. There is also nothing to put behind a sign-up, so no email address is asked for.

What a batch looks like

Drag a folder onto the drop zone, or press “Add a folder” and pick one. Single files, multi-file selections and pasted images all work the same way. PNG, JPEG and WebP go in; PNG with a transparent background comes out. A file can be up to 8192 px on a side and 80 MB, and there is no limit on the number of files.

The queue cuts up to eight images at the same time, one per processor core with one core left free so the page stays responsive, and it runs fewer at once on a device with little memory. A file that fails, a photo that wandered into the folder for instance, gets its own message in its own row with a Retry button, and the rest of the batch carries on. After a ZIP export, the panel says how many files were left out and points at their rows.

Every finished cut carries a quality check. If the key color turns up inside the subject, or the subject runs off the edge of the frame, the check names the problem and what to do about it instead of leaving you to find it after export.

Settings apply at download, not before

Export size (4500, 3000 or 2048 px on the long side, or keep the original size), trim-to-content and its padding all apply when you download. So you can change your mind after the batch has finished cutting, without re-running anything: cut once, export twice at two sizes if you need both. The print-on-demand page has the pixel arithmetic behind the presets.

Your choices are kept in your browser between visits. Nothing about them, and nothing about your images, is sent anywhere; the browser-only page explains that, and how to check it with the network panel open.

Getting renders the keyer can cut

Batch quality is decided at prompt time, before ClipBrook sees the files. A background with a vignette, a soft glow, or the wrong key color for the subject turns into haze and fringes that no slider fully rescues. The guide covers choosing between blue, red and green for your subject, the background clause that stops generators lighting the backdrop like a studio, and prompts you can copy for seven generators.