filetity

JPG / PNG / WebP -> PNG · Local tool

Background Remover

Cut the subject out of a photo into a transparent PNG, on your own device.

Last updated

  1. 01 / Your device

    the file stays here

  2. 02 / Browser memory

    the work runs locally

  3. 03 / Back to you

    saved on this device

When you would use this

Situations, not settings.

A product photo for a listing or a shop page
Cut the item out onto white or transparent, at the photo's own resolution, without sending it to anyone's server.
A headshot that needs a plain backdrop
The office wall goes; the person and their hair mostly stay. Check the edge on the slider before you save.
A logo or a sticker from a photo
A transparent PNG drops straight into a slide or a design tool. Pick a colour instead if the target cannot show transparency.

How it works / no cloud

A conversion engine, not an upload form.

filetity runs BiRefNet, an open-source segmentation network (MIT, from the BiRefNet project), inside your browser on ONNX Runtime compiled to WebAssembly. The model looks at the whole picture at 512 by 512 and marks how much of each pixel belongs to the subject; that map is scaled back to the photo's real size and written into the PNG's alpha channel, so the cut-out is at your photo's resolution rather than the model's. A quicker, rougher model (U²-Net, Apache-2.0) is one tap away for a phone or a slow connection. Each model downloads once, from this site, the first time you press the button. Your photo is never uploaded; there is no server to upload it to.

  • Offline ready
  • Installable app
  • No file limit queue

Straight answers

No accordion. Nothing hidden.

Is it free?
Yes, with no watermark and no page limit.
Does it need an account?
No. There is no account system.
Is my file processed on my device?
Yes. The file is read by your browser and never uploaded. There is no server to send it to.
What formats are supported?
JPG, PNG or WebP in. PNG out, with a real alpha channel, or flattened onto white, black or a colour you pick.
What are the limits?
Best on one clear subject with a defined edge: a person, a pet, a product. Hair and fur mostly survive; glass, smoke, motion blur and anything see-through do not, because a cut-out is one number per pixel and a glass is both itself and what is behind it. Thin things like spokes and wires can break up. The best model is a 57 MB download and takes several seconds on a laptop, longer on a phone; the quick one is 4.6 MB and about a second, with rougher edges. Photos over 16 megapixels are worked at a smaller size and the page says so.
Does it work on mobile?
Yes, on any modern mobile browser. Large files are limited by the memory the phone gives the browser.
Does it work offline?
Yes, after the first use. Each model downloads once, then your browser keeps it, so later visits work with no network connection.
Does it make the background transparent?
Yes. The default output is a PNG with a real alpha channel, so the background is genuinely gone rather than painted white. Drop it into a slide, a listing or a design tool and whatever is underneath shows through. If you want a solid backdrop instead, pick white, black or a colour before you press the button and the PNG comes out flattened onto it.
How good is it compared with remove.bg?
On a clear subject, close. On hair against a plain sky, individual strands survive; on a cat with its body out of focus, the whole cat is kept with a clean edge. Where it falls short is glass, smoke, motion blur and very thin structures, which paid cloud tools handle with bigger models than a browser tab can hold. The comparison slider on the result exists so you can check the edges before you save rather than after.
Why is there a 57 MB download?
The model is a neural network and that is its size after being quantised to 8-bit weights; the same network as published is 224 MB. It downloads the first time you use the tool, from this site, and your browser caches it, so it is a one-time cost. Nobody who visits any other page downloads a byte of it. The quick model is 4.6 MB if that is too much for the connection you are on.
Why was my photo worked at a smaller size?
A browser canvas has a ceiling of about 16 megapixels on some phones, and every pixel is held three times over while the alpha is written. Above that the tool works at the largest size that fits and tells you the exact pixels. A 12 megapixel phone photo is under the line and comes out at its own size.
Is the photo uploaded anywhere?
No. The model runs in your browser and the photo never leaves the tab. There is no server on this site that could receive it. After the first use the page works with the network switched off, which is the easy way to check.
It says no subject was found. Why?
The model marked almost every pixel as background, which happens on a landscape, a texture, a very busy scene or a picture with several equal things in it. It is built to find one thing in front of everything else. Rather than save a blank PNG it stops and says so. A photo with a clear subject, or a crop that makes one clear, usually works.

How this one works

Keep working locally

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