Circle Crop Image — Free, Fast & Private
Drop in a photo and a circle appears over it — drag the circle to position it, pull any of the four handles to resize it, and export. Everything inside the circle is kept; everything outside becomes genuinely transparent, not white. The circle is tracked in the image's own pixel coordinates, so the framing you set on the preview is exactly the framing in the downloaded file, and the cut happens at the photo's native resolution — no resampling, no quality loss, just a round window onto the original pixels.
The output is a square PNG the size of the circle's diameter, with the circle inscribed and the corners transparent. That shape is what every avatar upload, document, and design tool expects when it asks for a "round" image — and the transparency is the entire point, as the sections below explain.
Profile pictures: preview what the circle keeps
Nearly every platform now displays profile pictures as circles — X shows its 400×400 profile photo in a round frame, and chat apps, forums, and video-call tiles do the same — but almost all of them still ask you to upload a square. The platform then applies its own circular mask, and whatever sat in the corners of your square silently disappears: the top of a hat, an ear, the edge of a second person's shoulder, half of a logo's wordmark. Circle-cropping the photo yourself first inverts that relationship. You see precisely what survives the round frame before any platform touches it, adjust the circle until the composition works, and then upload with confidence — either the round PNG itself where transparency is accepted, or a square you have already verified against the circle. The social media size table has the per-platform pixel dimensions to pair with it.
Avatars, roundels, and round logo marks
Beyond profile photos, the round-with-transparency shape is a small workhorse: team pages where every headshot needs the same circular treatment, circular logo roundels for watermarks and stamps, round stickers and badge printables, speaker photos for event graphics, and app-icon drafts. Because the corners are transparent rather than filled, the same exported file works on a white page, a dark slide, and a coloured banner without re-exporting three versions — the background simply shows through where the circle is not.
Why the output is PNG only
This tool exports PNG and nothing else, and that is a decision rather than a limitation. The defining feature of a circle crop is the transparent region outside the circle, and of the formats in this site's pipeline, PNG is the one where that transparency reliably survives every downstream use. JPEG has no alpha channel at all — save a circle crop as JPEG and the corners must be flattened onto a solid colour, which un-does the crop's entire purpose. Offering a JPEG chip anyway would just let you break the output silently. If the file needs to be smaller, run it through the PNG compressor, which shrinks it losslessly with the alpha channel intact.
Transparency and the white-corner problem
Everyone has seen the failure mode: a "circular" logo pasted into a document or a dark-mode interface, wearing a white square behind it. That happens when the circle was exported without real transparency — the corners were filled with white, invisible against a white page and glaring everywhere else. A true alpha channel fixes it permanently: the corners carry no colour, so Word documents, slides, dark dashboards, and printed layouts all show their own background through them. It is the difference between an image that happens to look round on one background and an image that is round.
Exact by construction, private by architecture
The circle lives as centre-plus-radius in source-pixel space, the export canvas is the circle's bounding square at native resolution, and the pixels inside the circle are copied straight from the original — the crop cannot drift from what the preview showed, because both are computed from the same numbers. And as with every MiniPx tool, all of it happens in your browser through the Canvas API: the photo is never uploaded, which matters more than usual for the single most personal category of image there is — pictures of your own face. If the framing you need is rectangular rather than round, the ordinary crop tool is the right instrument.