Watermark Adder
Add text watermarks to images in your browser — protect content before sharing on social media.
Images never leave your browser.
About this tool
Watermarks deter casual reposting of your photography and graphics on social platforms.
Apply locally before sharing — opacity and placement balance protection vs. viewing experience.
How to use the Watermark Adder
- 1
Upload your image locally.
- 2
Enter watermark text, adjust size, opacity, and position.
- 3
Download the watermarked image — processed entirely in-browser.
Effective watermarking
Corner placement is standard — center watermarks protect more but distract heavily.
Semi-transparent text at 30–50% opacity is readable without dominating the image.
Pro tips
- Include your handle in watermark text for attribution when reposted.
- Watermark final exports, not RAW masters you may re-edit later.
Social Media Specs & Character Limits
Optimal text formatting, length guidelines, and parameters for all major platforms:
| Platform | Max Length | Ideal Length | Hashtag Policy |
|---|---|---|---|
| Instagram Feed & Reels | 2,200 chars | 125 - 150 chars | 3 - 5 tags (Recomm.) |
| TikTok Posts | 4,000 chars | 100 - 200 chars | 3 - 5 tags (Ideal) |
| YouTube Description | 5,000 chars | 1,500 chars (SEO) | 3 - 10 tags |
| X / Twitter Post | 280 chars | 100 - 140 chars | 1 - 2 tags |
| LinkedIn Articles & Posts | 3,000 chars | 500 - 1,000 chars | 3 - 5 tags |
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Frequently Asked Questions
Can I use custom fonts?▼
The tool uses web-safe fonts — choose size and opacity for visibility without overpowering the image.
Is my image uploaded?▼
No. Watermarking uses HTML canvas locally — your image stays private.