Text or your logo, with position, size, opacity and angle under your control — or tile it across the whole picture.
Your images are processed on your device and never uploaded.
Drag and drop your images
or click to choose · Ctrl+V to paste (several at once, up to 50MB each)
Everything runs in your browser. Your images and your logo are never sent to a server.
MamePress puts your text or your logo on a photo and saves it at the size it already was. The whole job runs inside your browser: nothing is uploaded to a server, so unpublished work, client proofs and product shots stay on your device. There is no account to create, nothing to pay, no limit on how many times you use it, and no watermark of ours on the result: the only mark on the picture is the one you made.
| Job | Placement | Opacity | Why |
|---|---|---|---|
| Credit or signature | One spot, bottom right | 30–50% | Shows whose it is without covering the subject |
| Discourage copying | Tile across, slanted | 20–35% | Cannot be cropped off, slow to paint out |
| Proof or sample | Centre, large | 35–60% | Marks it plainly as not the final file |
| Brand logo | A corner, logo image | 50–80% | The same look on every post and listing |
Drop every photo from a shoot at once. The first one opens and you make the mark on it; the settings carry over to the next image. Press Download with watermark and the next photo opens with the same mark, or Skip to the next image to pass one over. To get them all in one go, press Save all … as ZIP: every photo goes in, including any you already downloaded, with the settings as they are when you press it. The mark is sized to each photo, text to its shorter edge and a logo to its width, so a portrait and a landscape shot get a matching mark. It does not adjust the colour or opacity photo by photo, so look at the first one before you save the ZIP. A file that cannot be opened is skipped rather than stopping the run, and its name is listed on the page.
Type the text (a name, a © line, a site address, or SAMPLE) in bold white, black or red, or press Choose a logo and pick a PNG, JPEG or WebP. A logo saved as a PNG with a transparent background lands as its shape alone, with no box around it. Size, Opacity and Angle are sliders you move while you watch the photo. One spot puts the mark in one of nine positions; Tile across repeats it over the whole picture, and with an angle it runs diagonally.
The photo is saved at its original width and height, in the format it was opened in: JPEG stays JPEG, PNG stays PNG, WebP stays WebP. HEIC from an iPhone becomes JPEG, and AVIF, GIF and BMP become PNG, because a browser cannot write those formats; when the format is going to change, the page says so before you save. A PNG is written without loss; a JPEG or a WebP is compressed once more when it is saved. A JPEG that is saved as a JPEG keeps the print resolution (DPI) recorded in the original.
Are my photos uploaded anywhere?
No. The watermark is drawn inside your browser, on your own device. Neither your photos nor your logo are sent to a server; there is no upload endpoint to send them to, so unpublished work and product shots stay with you.
Can I add my logo instead of text?
Yes. Press "Choose a logo" and pick a PNG, JPEG or WebP. A PNG with a transparent background works best: only the shape of the logo lands on the photo, with no box around it. The logo is read on your device too. One mark goes on at a time, either the text or the logo, not both.
Can I watermark many photos at once?
Yes. Drop them all at once, or choose several. The first one opens and you set the watermark on it; the settings (text or logo, colour, position, size, opacity and angle) carry over to the next image. Press "Download with watermark" and the next image opens with the same mark, or "Skip to the next image" to pass one over. "Save all … as ZIP" puts every image in one file, including any you already downloaded, with the settings as they are when you press it. The mark is sized to each image (text to its shorter edge, a logo to its width), so photos of different sizes get a matching mark. It does not change the colour or opacity photo by photo, so a white mark can disappear on a white background: check the first image before you save the ZIP. A file that cannot be opened, is in an unsupported format or is over 50MB is skipped rather than stopping the run, and its name and the reason are listed on the page.
Where should the watermark go, and how strong should it be?
For a credit or a signature, a corner that does not cover the subject (bottom right is the usual one) at about 30–50% opacity. To make copying harder, choose "Tile across" and set an angle of about -30°: a tiled, slanted mark cannot be cropped off and is slow to paint out. For a proof or a sample, put it in the centre and make it larger. "Opacity" runs from 5% to 100%, where 100% is fully solid.
What can I change about the watermark?
"Size" runs from 2% to 30%; for text it is the height of the letters as a share of the photo's shorter edge. "Opacity" runs from 5% to 100%. "Angle" runs from -90° to 90° in steps of 5°. Text is bold, in white, black or red. "One spot" places the mark in one of nine positions on a 3 × 3 grid, with a small margin from the edge; "Tile across" repeats it over the whole picture. The text is one line, in the device's own sans-serif typeface; there is no choice of font.
Which formats does it read, and what is saved?
It reads JPEG, PNG, WebP, AVIF, GIF, BMP, HEIC and HEIF, up to 50MB a file, so photos straight off an iPhone open as they are. A JPEG, PNG or WebP is saved in its own format. HEIC and HEIF come out as JPEG, and AVIF, GIF and BMP come out as PNG, because a browser cannot write those formats; the page says so before you save. The file is named after the original with -watermark added. An animated GIF is stamped on its first frame, and the animation is not kept.
Does it change the size or the quality?
The width and height stay exactly as they were. A PNG is written without loss. A JPEG or a WebP is compressed once more when it is saved, at quality 0.92, so the file size moves a little. A JPEG that is saved as a JPEG keeps the print resolution (DPI) recorded in the original, so a 300dpi scan is still a 300dpi scan.
Does a watermark stop people from copying my photos?
No. A watermark makes copying less tempting and shows where a picture came from when it is copied anyway; it does not stop anyone technically. A small mark in a corner can be cropped off. For work that matters, combine it with a lower published resolution and a tiled, slanted mark.
Can it remove a watermark from a photo?
No. This tool only adds a watermark. It does not remove or paint out one that is already in a picture.
Before you post, make the photos smaller with theimage resizeror theimage compressor, and hide faces or a name in the background with theblur and pixelate tool. All three run in the browser too.
