Put one logo on many photos

Every other page here opens a stage for one photograph. This one opens the queue straight away, because placing a mark on a folder is a rule rather than a position. The preflight tells you what is in the queue before anything runs; the rule decides where the mark goes on each photo; and each row is the evidence that it went where you meant.

1. 1Drop the photos. Choose or drop every photo at once — a whole folder is fine. The preflight counts them, adds up their size and reads their dimensions.
2. 2Choose the mark. One transparent PNG is the happiest case. It goes on every photo, scaled by one factor on both axes, never squashed.
3. 3Set the rule. Pick one of nine anchors, a gap from the edges and a size, both as shares of each photo — or fixed pixels for a set of same-size photos.
4. 4Run it. Each photo is opened, measured under the mark, marked and saved in this tab, one at a time. Each row says where the mark landed and whether it will be seen.
5. 5Download the ZIP. Save photos one by one from their rows, or all of them as one ZIP built in the tab.

Where

The mark's size and position in that photo's own pixels.

As shares

The same figures as a share of the frame — the numbers that should match across the set.

Ground

What the photo reads under the mark, and whether the chosen mode will be clear, faint or lost there.

Size

The saved file's real size.

• Each photo keeps its own pixel size. Nothing here resizes a photo or changes the mark's proportions.
• A row cannot be nudged on its own yet; change the rule and run again.
• The mark is one picture file. Text and drawn textures are placed on one photo at a time on the other stages.

Why a rule instead of dragging?

Because a place you drag to on one photo does not exist on the next one if they are different sizes. A rule stated as shares of the frame — bottom right, a 3% gap, 18% of the long edge — lands in the same visible place on a 900-pixel phone shot and a 6000-pixel camera file.

My photos are different sizes. Is that a problem?

Not with the default rule, which is relative to each photo. The fixed-pixel rule is there for sets exported at one size; if you choose it on mixed sizes, the panel warns you and every row shows where the mark actually landed.

Why did one row change the mode or warn me?

Each photo is measured under the mark before it is drawn. Multiply has nothing to darken on a night shot and Screen has nothing to lighten on snow, so the row says the mark will be faint or lost there. Pick per picture lets each photo use the mode that survives its own ground.

Are my photos uploaded?

No. Each photo is decoded, marked and encoded in this tab and released before the next one. The ZIP is built here too. There is nothing on this site that could receive a picture.

How many photos can I do at once?

Two hundred is the comfortable limit for one run; past that the preflight warns you and the run carries on one photo at a time. Photos over the browser's safe size are named before you start.

• Add a logo to a photoOpens small, in the corner, inside the margin a crop is least likely to take.
• Where a logo should sitSize against the frame, the corner that survives a crop, and the margin to leave.
• Overlay or watermarkA mark you want read against a mark meant to be ignored, and why the tools differ.
• Place something on a photoThe stage and a deck of layers: logos, stickers, textures or a second photo, each moved until it looks right.