Watermark anything.
Nothing leaves your phone.
Marklab stamps photos, PDFs and videos with your own text or logo, handles whole batches at once, and shows you the hidden data your pictures carry.
Coming to the App StorePhotos, PDFs and videos
One watermark engine for all three. What you see in the preview is exactly what gets exported.
Batch watermarking
Pick a whole set of photos and stamp them in one pass. Files are processed one by one, so large sets stay safe on older devices.
Saved presets
Store the styles you use often, then apply them to the next file in a single tap.
Hidden data
See the location, date and device details buried inside a photo, and strip them before you share it.
Offline by design. Marklab has no servers, no accounts and no analytics. Your files are opened, processed and saved entirely on your device, so the app works the same in airplane mode.
Questions or feedback
Write to tech@clk.company and we will get back to you.