Image Watermark Generator
Apply a customizable text watermark to your image. Control size, opacity, position, and export format with live preview.
Current size: 32 px
Current opacity: 0.35
Current margin: 20 px
Current quality: 0.90
Use a lighter opacity for subtle branding or copyright marks. Larger font sizes and margins work better on high-resolution images.
Privacy: watermark generation runs locally in your browser. No image is uploaded, transmitted, or stored.
Learn more about images
Understanding formats and optimization helps you get better results when converting or editing images.
How it works
This tool applies a text watermark directly onto your image using browser-based canvas rendering. The watermark is permanently embedded into the exported file.
- Font size: Larger values increase visibility, especially on high-resolution images
- Opacity: Controls transparency. Lower values are subtle, higher values are more visible
- Position: Corner placement is cleaner, center placement is stronger for protection
- Margin: Distance from edges. Useful for avoiding clipping
- Result interpretation: Export size depends on format and compression quality
Examples
- Portfolio protection: Add a small bottom-right watermark to prevent unauthorized reuse
- Client preview: Place a large semi-transparent center watermark for draft sharing
- Branding: Add consistent corner watermark to social media images
- Proof images: Use high opacity and center placement for temporary previews
When to use this tool
This tool is designed for quick, practical tasks such as everyday calculations, data formatting, or simple conversions. It is best used when you need fast results without installing software or using complex tools.
When to use
- Quick checks or one-time calculations
- Validating or converting data before using it elsewhere
- Simple tasks that do not require advanced software
When not to use
- Critical financial, legal, or medical decisions
- Large-scale or automated processing
- Situations requiring guaranteed precision beyond basic validation
Always review results before using them in important contexts.
About this tool
This tool helps you process and convert images directly in your browser. It runs entirely in your browser without sending data to a server.
You can use this tool when optimizing images for web use or changing formats. The results should be interpreted as a modified image with updated format, size, or quality.
FAQ
- What does this watermark generator do?
It adds a text overlay directly onto your image using canvas rendering. The watermark becomes part of the final exported image.
- How should I choose watermark opacity?
Use low opacity (0.2–0.4) for subtle branding. Use higher opacity (0.5–0.8) when you need stronger copyright protection or proof images.
- Which position is best?
Corner positions are less intrusive for normal use. Center placement is more visible and is commonly used for proof images or previews.
- Does this upload my image?
No. All processing happens locally in your browser. No data is sent to any server.
- Will watermarking reduce image quality?
The watermark itself does not reduce quality. However, exporting as JPEG or WebP may introduce compression depending on the selected quality setting.
- Which format should I export?
Use PNG for lossless quality. Use JPEG or WebP for smaller file size with adjustable compression.