Add watermark to images online free — text or image overlays with adjustable position, size and opacity. Protect your photos in-browser.
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Add a text or logo watermark to your images free. Set position, size and opacity, then download — your photos never leave your device.
Currently text watermarks are supported. You can freely adjust the text size, opacity, and position.
Yes — upload several files and the same text, position and opacity settings are applied to every image. When the photos have different aspect ratios it is safer to place the mark by percentage rather than fixed pixels, and the finished set downloads together.
A small mark in a corner disappears with a single crop, so run the text diagonally across the subject or tile it as a repeating pattern. An opacity of about 25-40 % stays unobtrusive while making removal impossible without damaging the underlying detail.
What matters is something that identifies the source, so a brand name, domain or social handle is the practical choice. For a scanned contract or ID copy, adding the purpose and date — "for ○○ application, 2026-09-07" — is far more effective at stopping the file being reused elsewhere.