Is my image uploaded to a server?

No. The watermark is applied entirely in your browser using the Canvas API. Your image never leaves your device.

What does the tiled position do?

Tiled repeats the watermark text across the entire image in a diagonal grid pattern, making it much harder to crop out.

What does font size percentage mean?

Font size is calculated as a percentage of the image's shorter side in pixels (width or height, whichever is smaller), so a 5% size on an image whose shorter side is 2000 px renders as a 100 px font — consistent across all resolutions and aspect ratios.

Can I use a transparent or semi-transparent watermark?

Yes. The opacity slider ranges from 5 (barely visible) to 100 (fully opaque). Values around 30–50 % produce a subtle watermark that doesn't obscure the image.

What image formats can I use as input?

Any format your browser can display — JPEG, PNG, WebP, GIF, BMP, SVG, and AVIF. By default the result is saved in the same format as the original, so a JPEG photo stays a JPEG instead of turning into a much larger PNG. You can also pick JPEG, PNG, or WebP yourself. Formats the browser cannot write (GIF, BMP, SVG, AVIF) are saved as PNG.

💧 Image Watermark — Free & Private, No Upload

Add a text watermark to your image in seconds — pick the position, size, color, and opacity, then download it in the same format as the original. Everything runs in your browser; no file is ever uploaded. Looking for a free iLoveIMG alternative? Toolio’s version is completely free and needs no sign-up.

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Drop an image here, or click to browse

Watermarked in your browser — no upload

Private by design. This tool runs entirely in your browser — nothing you enter is uploaded, and it works offline.

About

This tool stamps a text watermark onto your image entirely inside the browser using the Canvas API — your original file never leaves your device. You can place the watermark at any of the four corners, centered, or tiled across the full image. Font size is expressed as a percentage of the image's shorter side, so the result scales correctly regardless of image resolution or aspect ratio. Color and opacity controls let you create both subtle copyright notices and bold visible stamps, and the text shadow option keeps the text readable on both bright and dark photos. The canvas preview updates in real time as you adjust settings. The result is saved in the original format by default, so a JPEG photo stays a JPEG of similar file size; choose PNG if you want lossless output.

How to use

Drop your image onto the upload area or click to select a file from your device.
Type your watermark text — a copyright line, brand name, or any label you need.
Choose the position: top-left, top-right, center, bottom-left, bottom-right, or tiled.
Adjust the font size (% of the image's shorter side), color, and opacity until the canvas preview looks right.
Pick an output format (the original format by default), then click Download to save the watermarked image to your device.

FAQ

Is my image uploaded to a server?: No. The watermark is applied entirely in your browser using the Canvas API. Your image never leaves your device.
What does the tiled position do?: Tiled repeats the watermark text across the entire image in a diagonal grid pattern, making it much harder to crop out.
What does font size percentage mean?: Font size is calculated as a percentage of the image's shorter side in pixels (width or height, whichever is smaller), so a 5% size on an image whose shorter side is 2000 px renders as a 100 px font — consistent across all resolutions and aspect ratios.
Can I use a transparent or semi-transparent watermark?: Yes. The opacity slider ranges from 5 (barely visible) to 100 (fully opaque). Values around 30–50 % produce a subtle watermark that doesn't obscure the image.
What image formats can I use as input?: Any format your browser can display — JPEG, PNG, WebP, GIF, BMP, SVG, and AVIF. By default the result is saved in the same format as the original, so a JPEG photo stays a JPEG instead of turning into a much larger PNG. You can also pick JPEG, PNG, or WebP yourself. Formats the browser cannot write (GIF, BMP, SVG, AVIF) are saved as PNG.