Stamp a repeating "for submission" watermark across a copy of an ID or document to prevent misuse.
Supports JPG · PNG · WebP — no server upload
You end up handing copies of your ID to banks, carriers, insurers and employers more often than you'd think. If a copy submitted without a watermark leaks, it can be used to open accounts remotely, take out loans or activate phone lines in your name. Korea's Financial Supervisory Service and Personal Information Protection Commission both recommend that, when submitting a copy of an ID, you overlay a watermark stating the purpose and the date. This tool repeats your text across the whole image in a grid pattern, making it hard to remove.
Your text repeats across the entire image in a grid. Unlike a watermark stamped in one spot, it can't simply be cropped or erased away.
One checkbox appends today's date to your text, pinning down when it was submitted and blocking later reuse.
Your ID image never leaves your device, and the unwatermarked original is never stored anywhere.
Adjust opacity, size, angle and spacing with a live preview, so the document stays readable while misuse is still blocked.
Follow the steps below to watermark an ID or document image.
💡 For parts that must not be visible at all, such as the last digits of an ID number, use the mosaic toolto cover them first, then add the watermark — that's safer.
With watermarks, what matters is less that you added one than how you added it. A poorly placed watermark is easy to strip out in an image editor.
Writing just "copy" leaves it reusable anywhere. Spell out where, when and what for — e.g. "2026.07.10 — for ___ Bank loan application".
A watermark sitting only in the margins can just be cropped off. Tune the size and spacing so the text runs across the photo, the name and the numbers. This tool's repeating pattern covers the whole image by default.
Too faint and it's easy to remove; too heavy and the document becomes unreadable and gets sent back. Go as dark as you can while keeping the content legible.
Even watermarked, ID images left in your phone gallery, messenger history or downloads folder are still a leak path. Delete them as soon as you've submitted.
No. The image is handled entirely in browser memory and never sent to a server. Processing is so completely local that watermarking still works with your internet disconnected. Close the page and the image is gone from memory.
"Recipient + date + purpose" together is safest — for example, "2026.07.10 — for ___ Bank account opening, single use only". Naming the recipient blocks reuse elsewhere, and the date makes a later-leaked copy look obviously stale.
As long as the name, photo and required numbers stay legible, most organizations accept it. Keep opacity between 30% and 50% and check readability in the preview. Some organizations still demand an unwatermarked original — in that case, ask how and when they will destroy it.
No watermark is truly unremovable, but you can make removal far harder. Repeat the text so it crosses the photo and the printed fields, and even AI restoration tools struggle to erase it cleanly. A watermark confined to the margins disappears with a single crop, so always overlap the content.
Most organizations allow you to mask those digits, and from a privacy standpoint masking them is the default. Drag over that area in the mosaic tool to cover it, then upload the result here and add your watermark.
Yes. Photograph your ID with your phone and watermark and save it right here. Both Chrome and Safari on mobile are supported.