Free 100% In-Browser Tool

Add Text, Captions & Watermarks to Photos

Overlay custom text, captions, and copyright watermarks onto photos.

Quick Answer:Upload your photo, type your text caption, choose font and color styling, and download your watermarked image.

Initializing tool...

Privacy First: 100% Client-Side Processing

Processed in your browser. Files are never uploaded.

How to Use the Add Text to Image Online

Canvas 2D Rendering: Canvas.drawImage() -> Canvas.font & fillText() -> Canvas.toDataURL('image/png')

Mathematical formula, algorithm, or graphic processing pipeline.

Input: Standard input values and default parameters

Explanation: Processes calculations or media manipulation according to standard mathematical laws.

Result: Exact calculated output with verified accuracy

Is this tool completely free to use?▼

Yes, 100% free with unlimited calculations and instant browser downloads.

Does this work offline or on mobile devices?▼

Yes, the calculations run client-side in your web browser and are mobile optimized.

Are my files uploaded to any external server?▼

No, all media transformations and text processing execute entirely within your local browser.

What precision standard is used for calculations?▼

All mathematical tools use exact IEEE 754 floating-point arithmetic and standard scientific algorithms.

•Entering incomplete coordinates, zero standard deviation, or invalid file extensions.
•Assuming confidence intervals represent individual data point probabilities.

•Verifying statistical significance in academic research and scientific surveys.
•Designing graphics, watermarks, and optimizing media for fast digital distribution.

Last reviewed & updated: 2026-11-12

Free & Open Access

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