💧 Image Tools
Add a Watermark to an Image — Free
Protect your photos with a text watermark — your name, brand, or © notice. Place it in a corner, center it, or tile it across the whole image, with control over size and opacity. All in your browser, nothing uploaded.
✓ Free forever✓ No upload✓ No signup✓ In your browser
Quick answer: To watermark an image, drop your photo, type your watermark text, choose a position (corner, center, or tiled) and set the size and opacity, then click Add Watermark — the stamped image renders in your browser and downloads instantly, with no upload.
How to Watermark an Image
1
Add Your Image
Drop the photo onto the tool, or click to browse and select it.
2
Type Your Text
Enter a name, brand, or © notice as the watermark.
3
Place & Style
Pick a corner, center, or tiled placement and set size and opacity.
4
Download
Click Add Watermark, then download the protected image.
Why Use Convertlo?
- 🔒 100% Private — the image never leaves your browser
- 🆓 Free forever — no account, no forced Convertlo watermark, no limits
- 💧 Corner, center, or tiled — a subtle mark or full coverage
- 🎚️ Size & opacity control — from a faint tint to a bold stamp
- ✨ Full quality — output at the original resolution
- 📱 Works on mobile — any modern browser, any device
Features
100% Private
No server, no upload — your image stays on your device.
4 Placements
Bottom-right, bottom-left, center, or tiled.
Full Control
Adjust text, size, and opacity.
Tiled Coverage
Diagonal tiling deters cropping-out.
Full Quality
Output at the original resolution.
Mobile-Ready
Works on iPhone, Android, tablet, and desktop.
Frequently Asked Questions
Yes — completely free, no limits, and no account required. Convertlo runs entirely in your browser and does not add any Convertlo branding to your file — the only text on the image is yours.
No. The watermark is drawn locally in your browser using the HTML canvas. Your images never leave your device, so there is no file-size limit.
Tiled repeats your watermark diagonally across the entire image. Because the mark covers the whole photo, it is much harder for someone to crop it out — ideal for proofs and previews.
Yes. The opacity slider sets how faint or bold the text is, and the size slider scales it relative to the image, so you can keep the photo clear or make the mark dominant.
No. The original image is drawn at full resolution and the text is layered on top. Output is a lossless PNG, so aside from the watermark itself the photo is unchanged.
Yes. Any text you can type works, including the © symbol and emoji, so “© Your Name 2026” or a brand name all render correctly.