How to remove the background from an image and make it transparent

What removing a background actually does

A picture is a grid of pixels, and every pixel has a color. Removing the background means marking some of those pixels as see-through instead of white, blue or whatever they were. The see-through pixels are stored in an alpha channel, and editors show them as a gray and white checkerboard so you can tell empty from white.

Why bother? A logo with a transparent background can sit on a dark website header, a colored invoice or a photo without a white rectangle around it. A signature with a transparent background can be dropped onto a PDF and look as if it were signed by hand.

Two things follow from this. The result has to be saved as PNG or WEBP, because JPG has no alpha channel. And the quality of the result depends on how well the tool can tell the subject from the background, which brings us to the kind of picture you have.

Which pictures work with a one-click tool, and which do not

Background removers fall into two groups. Color-based tools make every pixel that matches the background color transparent. They are fast, precise on sharp edges and ideal for logos, signatures, stamps and scans. AI subject detectors try to recognize a person, pet or product and cut around it. They handle photos with real backgrounds, but they guess at hair, glass, fur and shadows, and they often need a manual touch-up.

Make background transparent on DocGopher is in the first group. It removes a plain white or colored background from logos, signatures and scans. It is not meant for photos with busy backgrounds, and it will not try to find a face in a vacation picture. If that is your situation, skip ahead to the iPhone and PowerPoint sections, which use subject detection.

• Works well: a logo exported with a white box, a signature photographed on white paper, a scanned stamp, a product shot on a plain backdrop, a sticker on a solid color.
• Works with care: a photo on a plain wall where the subject shares a color with the wall, or where shadows fall onto the background.
• Does not work: a person in a street scene, a dog on grass, anything where the background has texture or several colors.

How to remove a white background from an image online

The online route is free, needs no sign-up and adds no watermark. It works in a browser on a phone or a computer, so you can do it from the camera roll without installing anything. Files up to 300 MB are processed in memory on DocGopher's own servers and deleted after 30 minutes.

For a signature, write with a dark pen on white paper, photograph it in daylight without a shadow from your hand, and crop close before you remove the background. The cleaner the white, the cleaner the edge.

1. Open Make background transparent in your browser.
2. Drop in the image, or pick it from your files. You can add up to 50 pictures in one batch, which is useful for a folder of logos or a set of product shots on the same backdrop.
3. Run the tool and look at the preview. The checkerboard shows where the background was removed.
4. If a thin fringe of the old background remains, the original had a soft shadow or JPG noise. Re-export or rescan it on a cleaner white and run it again.
5. Download the PNG. Keep the original too, since you can always redo the removal but you cannot get the background back from the PNG.

PNG vs JPG: why the background keeps coming back white

This is the most common surprise. You remove the background, save the file, send it, and the recipient sees a white box again. The culprit is almost always the format. JPG cannot store transparency, so any app that saves a transparent picture as JPG fills the empty pixels, usually with white, sometimes with black.

The reverse is also worth knowing. A JPG converted to PNG does not become transparent on its own. Conversion changes the container; only a background remover changes the pixels.

• Save and share the result as PNG. WEBP also supports transparency and is smaller, but a few older apps do not open it.
• Do not let a messaging app convert it. Some chat apps turn PNGs into JPGs to save bandwidth. Send the file as a document or attachment, not as a photo.
• If someone sends you a logo as a JPG with a white box, you do not need the designer: remove the white background and save as PNG.
• If a form insists on JPG, PNG to JPG fills the transparent area with a solid color you choose, instead of the form doing it for you.

How to remove a background on an iPhone or a Mac without any app

Apple added subject detection to Photos a few years ago, and it is good enough for most people and pets.

For a logo or a scan on a plain color, Preview's Instant Alpha gives you more control. Open the picture in Preview, click the Markup toolbar button and choose Instant Alpha (the magic wand). Click on the background and drag slowly until the whole background is highlighted but the subject is not, then press Delete. Repeat for areas cut off from the first selection, such as the inside of letters. Then choose File, then Export, set Format to PNG with Alpha checked, and save under a new name.

1. On an iPhone (iOS 16 or later): open the photo in Photos, then touch and hold the subject until a white outline shimmers around it.
2. Tap Copy, then paste it into Notes, Messages or Mail. Or tap Share and choose Save to Files to keep a PNG with a transparent background.
3. On a Mac (macOS Ventura or later): right-click the image file in Finder, choose Quick Actions, then Remove Background. A new PNG appears next to the original.

How to remove a background in PowerPoint, Paint or Word

Microsoft Office has had a Remove Background button since 2010, and it is more capable than most people expect. It uses subject detection, so it works on photos as well as logos.

On Windows 11, Paint has a Remove background button on its toolbar, and the Photos app has one in its editor. Save as PNG. Older Windows versions have no built-in option, so use PowerPoint or a browser tool.

1. Insert the picture on a slide (or in a Word document), select it, and open the Picture Format tab.
2. Click Remove Background. PowerPoint shows the parts it plans to remove in magenta.
3. Use Mark Areas to Keep and Mark Areas to Remove to draw short lines over anything it got wrong.
4. Click Keep Changes.
5. Right-click the picture, choose Save as Picture, and pick PNG as the format. This step matters: a JPG here would refill the background.

Resize the cutout for a logo, a listing or a profile picture

A transparent PNG is usually a middle step. The final destination has a size, and getting that right avoids blur and odd cropping.

Resize image changes the size in pixels or percent and has presets for Instagram, Stories, passport photos and other common sizes. If the problem is the shape rather than the size, Crop image cuts to a square, 4:5, 16:9 and other shapes, and can trim plain borders automatically, which is handy right after removing a background. Always resize down, not up.

• Website logo: export at twice the displayed size so it stays sharp on high-resolution screens. If the logo shows at 200 pixels wide, keep a 400-pixel version.
• Email signature: around 300 to 400 pixels wide, under 50 KB, PNG.
• Marketplace listings: most sites want a square of at least 1,000 by 1,000 pixels on pure white. Put the transparent product on a white canvas rather than uploading transparency, since some listing systems fill transparency with black.
• Profile pictures and avatars: square, typically 400 by 400 or larger. Crop to a square first so the subject stays centered.

Keep the PNG small

PNG files are larger than JPGs of the same picture because they are lossless, and a transparent PNG with a soft edge can easily reach several megabytes. Large logos slow down web pages and get rejected by some forms.

Compress image makes PNG, JPG, WEBP and iPhone photos much smaller for email, web and upload, and it keeps the transparency of a PNG. For a logo or icon, aim for well under 100 KB.