How do I add a watermark to an image?

Drag, click, or paste (Ctrl+V) a JPEG, PNG, WebP, or AVIF image into img-tools, then enable the text watermark panel to type your text and set font size, color, opacity, and a nine-point position or Tile mode — and/or enable the image watermark panel to load a logo. The Canvas preview updates live, then you click Export to save as JPEG, PNG, or WebP. It's free and runs entirely in your browser with no upload.

Is the Image Watermark tool free?

Yes — adding text or logo watermarks (with adjustable position, opacity, and tiling) to your photos is completely free, forever. No account, no sign-up, and no limit on how many images you watermark. All compositing runs in your browser using the Canvas 2D API; your images are never sent to any server. The site is ad-supported.

Are images uploaded to a server?

No. All processing runs entirely in your browser; both the base image and watermark image never leave your device.

Does it work offline?

Yes. The tool uses the Canvas 2D API and requires no server connection. Load the page once, then disconnect — it still works.

Can I use both text and image watermarks at the same time?

Yes. Text and image watermarks can both be enabled simultaneously, each with independent position, opacity, and tiling settings. The tool composites them in sequence.

What image formats are supported?

Both the base image and watermark image support JPEG, PNG, WebP, and AVIF (browser-decoded). Output formats: JPEG, PNG, or WebP.

How does the nine-point position grid work?

The tool provides 9 anchor points (four corners, four edge midpoints, center). Click one and the watermark aligns to that position with a default margin. Enable Tile/Repeat to spread the watermark across the whole image at a fixed spacing.

Is there a file size or resolution limit?

No artificial limit. The practical cap is your device's available memory (typically tens of MB or more). Very large images may take longer to process.

Is the watermark image's transparency (Alpha channel) preserved?

Yes. The tool uses Canvas 2D globalAlpha and drawImage compositing, fully preserving alpha in formats like PNG. The exception is JPEG output, which does not support Alpha.

What is the difference between Tile mode and single-position mode?

Single-position mode places the watermark at your chosen anchor point. Tile mode repeats it across the entire image at a fixed spacing — commonly used for copyright protection of commercial photography.

Image Watermark

Add Watermark to Image is a free browser-based tool that overlays custom text or a logo/image on any photo, with a nine-point position grid, adjustable opacity, font size, color, and a tiled/repeat mode for copyright protection. Both text and image watermarks can be active simultaneously. The Canvas API does all processing on your device; images are never uploaded.

Add text or image watermarks locally in your browser — free, instant preview, no upload required.

100% Free — Forever. No fees, ever.
Private: files are processed locally in your browser and never sent to a server.
No upload, no account, no sign-up.

Load your base image
Drag and drop an image onto the upload zone, click to browse, or paste with Ctrl+V / Cmd+V. JPEG, PNG, WebP, and AVIF are all accepted.
Configure text watermark (optional)
Enable the Text Watermark panel. Type your watermark text, choose font size, color, and opacity. Select one of the nine position anchors or enable Tile to repeat across the whole image.
Configure image watermark (optional)
Enable the Image Watermark panel and load a second image (logo, signature, etc.). Adjust scale relative to image width, opacity, and position. Both text and image watermarks can be active at the same time.
Preview live
The canvas updates instantly as you change any parameter — no waiting, no server round-trip.
Export
Click Export / Download, choose JPEG, PNG, or WebP and quality, then download. The watermarked image is saved directly to your device.

How do I add a watermark to an image?: Drag, click, or paste (Ctrl+V) a JPEG, PNG, WebP, or AVIF image into img-tools, then enable the text watermark panel to type your text and set font size, color, opacity, and a nine-point position or Tile mode — and/or enable the image watermark panel to load a logo. The Canvas preview updates live, then you click Export to save as JPEG, PNG, or WebP. It's free and runs entirely in your browser with no upload.
Is the Image Watermark tool free?: Yes — adding text or logo watermarks (with adjustable position, opacity, and tiling) to your photos is completely free, forever. No account, no sign-up, and no limit on how many images you watermark. All compositing runs in your browser using the Canvas 2D API; your images are never sent to any server. The site is ad-supported.
Are images uploaded to a server?: No. All processing runs entirely in your browser; both the base image and watermark image never leave your device.
Does it work offline?: Yes. The tool uses the Canvas 2D API and requires no server connection. Load the page once, then disconnect — it still works.
Can I use both text and image watermarks at the same time?: Yes. Text and image watermarks can both be enabled simultaneously, each with independent position, opacity, and tiling settings. The tool composites them in sequence.
What image formats are supported?: Both the base image and watermark image support JPEG, PNG, WebP, and AVIF (browser-decoded). Output formats: JPEG, PNG, or WebP.
How does the nine-point position grid work?: The tool provides 9 anchor points (four corners, four edge midpoints, center). Click one and the watermark aligns to that position with a default margin. Enable Tile/Repeat to spread the watermark across the whole image at a fixed spacing.
Is there a file size or resolution limit?: No artificial limit. The practical cap is your device's available memory (typically tens of MB or more). Very large images may take longer to process.
Is the watermark image's transparency (Alpha channel) preserved?: Yes. The tool uses Canvas 2D globalAlpha and drawImage compositing, fully preserving alpha in formats like PNG. The exception is JPEG output, which does not support Alpha.
What is the difference between Tile mode and single-position mode?: Single-position mode places the watermark at your chosen anchor point. Tile mode repeats it across the entire image at a fixed spacing — commonly used for copyright protection of commercial photography.

The Canvas 2D API globalAlpha property allows watermarks to be set to any transparency level (0–1) without additional graphics libraries — specified in the W3C HTML Living Standard.
Client-side image processing eliminates network latency, making browser-based watermarking typically 10× faster than cloud services for typical file sizes, with no privacy risk.
Tiled watermarking is a standard technique in commercial photography licensing previews; repeating a watermark across the full image makes unauthorized removal impractical.
PNG's Alpha channel (transparency) makes it the ideal format for logo watermarks, as it preserves non-rectangular edges cleanly without a white or colored background box.
WebP supports both lossy and lossless compression plus Alpha channel — making it a modern choice that balances quality and file size. Source: Google WebP study shows 25–35% smaller files vs JPEG (developers.google.com/speed/webp/docs/webp_study).

💧 Image Watermark

Image Watermark