Watermark photos on your Mac with your logo, without uploading
By Himanshu Ranjan · Updated 8 November 2026
To watermark photos on a Mac with FileDial, select them in Finder, hold the right Option key and choose Markup › Add logo watermark… Each photo gets a watermarked copy beside the original, which stays clean. For a text mark such as your name, choose Markup › Add watermark text… Both run on a whole batch at once, entirely on your Mac.
How to do it with FileDial
- Select the photos in Finder.
- Hold right ⌥ to open the dial.
- Choose Markup › Add logo watermark… and pick your logo, or Markup › Add watermark text… for a text mark.
- Share the watermarked copies; the clean originals stay beside them.
Your original file stays untouched. The result is saved beside it, and every result has Undo.
Which option to pick
| Tool | Use it when |
|---|---|
| Add watermark text…Markup | When a name, copyright line or "proof" label is enough: text watermark on a new copy beside the original. |
| Add logo watermark…Markup | To brand or protect photos with your logo; new copy beside the original. |
What makes a useful watermark
A watermark does two jobs. It tells people who made the image, and it makes casual reuse less attractive. It will not stop a determined person with editing tools, so treat it as credit and deterrent rather than protection.
Placement is the main decision. A small logo in a corner is easy to crop out but barely affects the photo, which suits portfolios and social posts. A larger, semi-transparent mark across the subject is much harder to remove and suits client proofs you do not want used before payment. Consistent size and position across a set looks professional.
Use a logo file with a transparent background, usually a PNG, so it sits on the photo without a white box around it. Keep your clean originals somewhere safe, since a watermark baked into the only copy cannot be taken off later. If your logo only exists on a white background, Adjust › Remove background can turn it into a transparent PNG first.
Think about the rest of the file too. A watermarked photo still carries whatever metadata the camera wrote, including location and camera details. If you are posting proofs publicly, removing location from the copies you share is a sensible extra step.
- Portfolio and social: small corner logo.
- Client proofs: larger, semi-transparent mark.
- Always keep clean originals.
Why not use an online watermarking site
Watermarking is usually done on unreleased work: client shoots, proofs and product photos. An online watermarker needs the clean, unwatermarked originals uploaded, which is the version you least want floating around. The FBI Denver Field Office warned in March 2025 that free online file tools are increasingly used to spread malware and scrape personal data.
Cybernews reported in July 2024 that two online document services left 89,062 uploaded files exposed in open storage and did not respond. Watermarking in FileDial happens on your Mac, so the originals never leave it.
Other ways to watermark photos on a Mac
For one or two images, Preview's markup tools let you add a text box over a photo and export a copy. You can also paste a logo into an image in Preview, though positioning it the same way on many photos by hand is slow. The Photos app does not include a watermark tool.
FileDial is the better fit when you watermark often or in volume: select a whole shoot and run Add logo watermark… or Add watermark text… once, keep the originals untouched, and Undo any result. A recipe, such as a resize followed by the watermark, can prepare a batch for the web in one pass, and a watched folder can apply it automatically.
Questions
Does watermarking change my original photos?
No. Add logo watermark… saves a new copy beside each original, so your clean files stay as they were. If the result is not right, Undo on the result card removes the copy.
Can I watermark a whole folder at once?
Yes. Select all the photos in Finder and choose Markup › Add logo watermark…; it runs on every selected file. A watched folder can apply a recipe to anything you drop in.
Can I add a text watermark instead of a logo?
Yes. Markup › Add watermark text… adds text such as your name or a copyright line to each selected photo, on a new copy beside the original. FileDial also has a separate PDF version for documents.
Are my photos uploaded to add the watermark?
No. Every FileDial tool runs on your Mac, files are never uploaded, and all tools work with Wi‑Fi off. Your clean, unwatermarked originals never leave the Mac.
Can I watermark photos and strip their location in one go?
Yes. A recipe chains tools, so you can run Add logo watermark… and Remove location together. Each step produces a copy, and the result card shows what changed and the size before and after.