Watermark a Copy of Your ID Before You Send It
A photo of your ID is the one file you can never take back. ID Watermarker paints a repeating diagonal stamp across a copy — naming exactly who it's for and the date — so it can't quietly get reused somewhere else. It runs entirely in your browser; the file never leaves your device.
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The problem
Almost every month someone asks for a copy of your ID: a bank opening an account, a landlord screening tenants, an employer onboarding you, a gym, a hotel, a prepaid shop. So you photograph it and send it over WhatsApp or email — and from that moment the image sits on a stranger's phone, in their inbox, and often in their cloud backup too. A clean, unmarked photo of an ID document is exactly what's most valuable to a scammer, because it can be shown off anywhere as if it were freshly issued for them. You usually can't refuse to send it. What you can do is make sure the copy you send is clearly good for one purpose only.
How ID Watermarker works
- Open the photo, scan or PDF of your ID. It loads straight into the page on your own device — no upload step, no account.
- Say who it's for — "Bank account opening", "Apartment 12B application" — or tap one of the built-in purposes. The date gets added automatically.
- Adjust the stamp until it's clearly readable but your details still are too — then save the flattened copy and send that instead of the original.
What you get
- A stamp that names the recipientThe watermark repeats across the whole document and names the exact company and reason. A vague "COPY" is easy to reuse; "FOR Bank Account Opening ONLY · Sep 18, 2026" is not.
- Readable even on dark photosAn outline option puts a light glow behind the letters, so the stamp stays legible over a dark passport page or a photo, just as well as over plain white.
- Burned permanently into the pixelsSaving redraws the page as an image with the stamp permanently baked in. There's no layer to turn off, move or lift out in an editor.
- GPS goes away with itPhone photos carry EXIF metadata, often including the exact location where they were taken. On export the image is rebuilt and all of that falls away, along with the rest of the original metadata.
Private by design
ID Watermarker never uploads anything. Your document is opened, stamped and saved entirely in your own browser — there's no server it's sent to, no account to create, and no analytics watching. Saved purposes and your stamp settings stay only in this browser on this device. Being honest about the limits matters here too: a watermark is a deterrent, not encryption. It makes casual reuse obvious and effortful, but it won't stop someone determined with an image editor. Check whether the place asking for the document accepts a marked copy, and keep the stamp clear of your photo, document number and the machine-readable lines at the bottom. The Backup button saves that journal, your saved purposes and your settings into a file on your device; where you keep that file is up to you, and we never receive it.
Free vs Pro
What's new
v1.1.0 · 2026-09-26
- Export journal: every copy you save is noted on this device — purpose, date, expiry and a short code
- A short match code such as #A7F2 is stamped on the copy, so you can tell later which copy went where
- “Valid until” copies get an Add reminder (.ics) button for your calendar
- Saved purposes are now free for up to 3; Pro keeps unlimited
- Export journal now free for up to 3 entries; Pro keeps unlimited
FAQ
Is ID Watermarker free?
Yes. Stamping one file at a time — with all six purpose templates, full control over size, density, opacity, angle and color, saving up to 3 places you send ID to, and a local export journal (the 3 most recent entries, which you can export as CSV or JSON) — is free. Pro is $1 once and adds unlimited saved places, an unlimited export journal, stamping multiple files at once, and a "valid until" date with a calendar reminder.
Will the bank or landlord still accept a watermarked copy?
Usually yes, but ask first. Many banks, agencies and employers are used to marked copies, and some even require them. A few insist on an unaltered scan, and a handful of countries restrict altering official documents. Keep the stamp clear of the photo and document number so everything required stays readable.
Does the watermark actually prevent fraud?
It deters reuse rather than preventing it. Given enough effort, a watermark can be removed. What it reliably does is tie a copy visibly to a purpose and a date, so using it elsewhere takes deliberate work and leaves an obvious trace.
Does my ID get uploaded anywhere?
No. Everything happens in your browser on your own device. The file is never sent to a server, there's no account, and the app keeps working offline once it's loaded. The original photo's metadata, including any GPS location, falls away when the stamped copy is saved.