Add Text Watermark to Image
Add Text Watermark to Image draws bold sans-serif text in rgba(255,255,255,.75), aligned right at 20 pixels from the right and 24 from the bottom. Font size is max(18, width/25). It offers no drag positioning, font, opacity, outline, multiline, tiling, image logo, or contrast adaptation, so the mark can be illegible or clipped.
Runs locally — files stay on your deviceDoes a visible watermark prove ownership?
No. It is a deterrent and attribution cue that can be cropped, covered, or edited.
A pixel watermark is part of the exported raster
Canvas paints text over image pixels. It is not cryptographic provenance, metadata, or a tamper-evident signature.
How it works
Enter text or use Toolbox fallback. The image is drawn first, then the configured font and translucent white text are painted at the bottom-right before PNG export.
Key concepts
Contrast is not adaptive
White text can disappear on bright areas.
Cropping can remove edge watermarks
Bottom-right placement is easy to exclude.
When to use it
- Add simple attribution to a preview.
- Label drafts or review images.
- Create a lightweight visible ownership cue.
When not to use it
- Do not depend on it for copyright enforcement.
- Do not use on light backgrounds without checking readability.
- Do not expect multiline or repeated coverage.
Worked examples
Wide photo
- Input
© Studio- Expected output
Large bottom-right mark
Font scales with width.
Light corner
- Input
White sky at bottom-right- Expected output
Low-contrast watermark
No shadow or outline is added.
Empty text
- Input
Empty watermark- Expected output
Watermark fallback
A default word is used.
Common mistakes
Calling it protection
Pixels can be edited. Correction: Keep originals and licensing evidence.
Ignoring readability
Opacity and color are fixed. Correction: Inspect the exact placement.
Using long text
No wrapping occurs. Correction: Keep the mark short.
Best practices
- Use concise text.
- Inspect against the local background.
- Retain provenance records separately.
Related operations and differences
Flip Image Horizontally
Choose Flip Image Horizontally when you need to mirror an image from left to right.; use Add Text Watermark to Image specifically for watermark.
Flip Image Vertically
Choose Flip Image Vertically when you need to mirror an image from top to bottom.; use Add Text Watermark to Image specifically for watermark.
Image Compressor
Choose Image Compressor when you need to reduce image file size with adjustable quality.; use Add Text Watermark to Image specifically for watermark.
Image Resizer
Choose Image Resizer when you need to resize images to exact dimensions locally.; use Add Text Watermark to Image specifically for watermark.
Adjust Image Brightness
Choose Adjust Image Brightness when you need to increase or decrease image brightness.; use Add Text Watermark to Image specifically for watermark.
Adjust Image Contrast
Choose Adjust Image Contrast when you need to increase or decrease image contrast.; use Add Text Watermark to Image specifically for watermark.
Limitations and privacy
- Fixed bottom-right position, white color, 75% opacity, font family, margin, and single line.
- No logo, outline, tiling, rotation, metadata, or cryptographic provenance.
- PNG output.
Selected images are decoded and processed locally in this browser.
Frequently asked questions
Can position be changed?
No.
Can opacity be changed?
No.
Is it tamper-proof?
No.
What format is downloaded?
PNG.