Make a white background transparent

Pick the background colour and everything close to it turns transparent: green screens, white backdrops, scans and flat logos, in a blink.

Drop your files here

.jpg, .jpeg, .png, .webp, .avif · up to 50 MB

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How to Make Background Transparent

1
Add the image
JPG, PNG, WebP or AVIF, up to 100 files at a time. Phone photos are turned upright before the background is measured.
2
Choose the background colour and the tolerance
Pick a colour, or let the tool read it from the corners, or key out plain white. Raise the tolerance until the background is gone and lower it if the subject starts disappearing.
3
Download the PNG
The result is always a PNG with a real alpha channel, named after your file with -transparent on the end.

White goes everywhere, not only around the edge

The page opens with “White backdrop” under “How to pick the background”. Every pixel close to white turns transparent wherever it sits: the tool compares colors and does not trace outlines. On October 21, 2026, we tried a 600 × 200 logo saved as a JPG on white. Its background went completely, with no specks of JPEG noise left. So did its white play symbol and the white fill of its letters, all 9,558 pixels. Only the blue square and the dark outlines remained, and Remove Background dropped the white parts too. Export a logo with white in it from its source file as a PNG with transparency.

What a tolerance of 25 removes

At the default “Tolerance” of 25, a gray at three quarters of white or lighter turned fully transparent in our test. Darker grays, down to two thirds of white, came out partly transparent: that fade is “Edge softness” at 8. Our test signature, 300 dpi on off-white paper, lost all of its paper and none of its ink. At 40, the strokes lost 4 percent of their pixels, the lightest ones. The colored parts of the logo lost 2.9 percent instead of 1.6. Raise the tolerance only when gray paper is left behind.

When the page stops, and when it does not

First the tool checks an 8-pixel band around the edge of the picture. A test page with a shadow along one side failed. The page said the background was not a single color and offered “Open Remove Background”. That tool finds the subject on our server, from a 1024 × 1024 copy. The check asks whether the edge is one color, not whether it is white. A test picture of a sheet on a brown desk passed. The desk stayed, the lit half of the sheet turned transparent, and the shaded half stayed gray.

Whole pages, batches and the PNG you get

At least 1 percent of the picture has to stay. A test A4 page with a few lines and a signature fell short: tolerance 25 “removed the whole image”. Cut down to the signature, the same page passed and lost all of its paper; Crop Image makes that cut. The result is a PNG named after the file, with -transparent added. It can outweigh the original: the 88 kB signature JPEG became an 845 kB PNG. Up to 100 images go in at once; a refused one is left out of pulsarkit-transparent.zip. Nothing is uploaded.

No model, no upload, no network

Everything happens in this browser tab: reading the file, measuring the background, computing the alpha channel and writing the PNG. No neural network is downloaded and nothing is uploaded, which also means the tool keeps working with the connection off once the page has loaded. To continue in another tool, PulsarKit may store a local copy of your input or result in this browser. It can remain after you close the tab or restart the browser. Clear PulsarKit’s site data to delete it.

Frequently asked questions

How is this different from AI background removal?

This tool removes one colour; the AI tool understands a subject. Colour keying is instant and downloads nothing, but it only works when the background really is one colour. If the background is a room or a street, use Remove Background. This tool will tell you when that is the case rather than handing back a ragged edge.

Why is the output always a PNG?

Because JPEG has no alpha channel. Saving a cut-out as JPEG would fill every transparent pixel with a solid colour, which throws away the entire point of the operation. WebP could store the transparency, but PNG is what every design tool, office suite and website accepts without question.

What do tolerance and softness do?

Tolerance is how far a pixel's colour can be from the key colour and still count as background. Raise it if patches of backdrop survive, lower it if the subject starts dissolving. Softness is the width of the fade between fully transparent and fully opaque; a small amount gives a natural edge, none at all gives a hard, jagged cut.

Where does the green rim come from and what is despill?

It is light bouncing off the backdrop onto the subject, strongest in hair and on shoulders. Despill pulls the dominant channel of the key colour back towards the other two on the semi-transparent edge pixels, which removes the rim without changing the subject's real colours. Forty percent suits most footage; raise it if the rim is heavy.

Does it work on ordinary photographs?

Usually not, and the tool checks. It measures the colour spread around the border of the image, and if that spread is wide it stops and points you at AI background removal. A photo of a person outdoors has no single background colour, so no tolerance setting will produce a clean edge.

Can I process a batch of files?

Yes, up to 100 files with the same settings, which is exactly the case a product catalogue shot against one backdrop needs. The results come back as pulsarkit-transparent.zip, and a file that cannot be read does not stop the rest.

Does the file go to a server?

No. Every step runs in your browser. There is no upload and no model download. This is arithmetic over the pixels of a file that never leaves your device.