Flip it. Rotate it. Save it.

No. The flip and rotate work on a canvas element in your browser. Your photo never touches our servers — we don't run an image pipeline at all. Open DevTools → Network and watch: nothing leaves your device.

The turn is, and that part is checked rather than assumed: quarter turns and both mirrors swap the axes with no resampling, and the result comes back bit-identical to the same transform run through ImageMagick — zero differing pixels. What happens to the file depends on what you started with. Start from a PNG or WebP and you get a PNG back, so the pixels really are the ones you began with. Start from a JPG and you get a JPG back, re-encoded once at high quality — the geometry is still exact, but a JPEG cannot be re-saved without passing through the codec again. One turn and one save costs very little; turning the same JPG five separate times is what to avoid. The straighten slider is different again: any angle other than a quarter turn has to re-draw every pixel, so do it once rather than nudging it across several rounds.

Flip mirrors the image; rotate spins it. The mirrors work on what you see, so “left–right” swaps the left and right of the picture on screen even after you have turned it a quarter — which is not how a naive implementation behaves, and was worth fixing. Selfies usually want a mirror; sideways photos want a turn. Both together is fine, and the order you click them in does not change the result.

Tilting a rectangle leaves four empty wedges, and you get to choose what happens to them. “Trim to fill” cuts the frame down to the largest straight rectangle inside the tilt — a 669×800 photo at 7° comes out 583×734, and the panel tells you it cost 20% of the edges. “Keep it all” grows the frame to 762×876 instead and fills the corners with the colour you pick. Either way the number is on screen before you save.

The tool picks for you, based on whether the file needs an alpha channel. Straighten with transparent corners, or start from a PNG or WebP that may already carry transparency, and you get PNG. Everything else saves as JPG, which is several times smaller and loses nothing a photo needs. The Save button always names the format you are about to get.

For a straighten, yes — “Trim to fill” is exactly that crop, taken automatically to the largest rectangle with no empty corners. For any other crop, save here and run the file through the crop and resize tool, which has the social presets.