Adding a text watermark to an image locally—without uploading it to a server—is possible with precise control over position, size, color, and opacity. The Add Watermark to Image tool lets you place a custom text label on JPG, PNG, or WebP files up to 25 MiB directly in your browser. You can choose from five positions (center, top left, top right, bottom left, or bottom right), set a font size between 12 and 200 pixels, adjust opacity from 10% to 100%, and pick a color using a HEX selector. The tool automatically scales long text to fit within the image margins, ensuring no part of the label is clipped. After previewing the result, you download a same-size PNG with the watermark applied, making it ideal for review labels, ownership notices, draft stamps, event names, or portfolio previews where visible text is needed.
Many workflows require a quick, private way to mark images without relying on desktop software or online services that upload files. For example, photographers sharing proofs with clients, designers labeling drafts, or event organizers adding names to promotional images can use this tool to apply a watermark in seconds. The process is entirely local, meaning your image and text never leave your device. This is especially useful for sensitive or proprietary content where privacy matters. The tool’s simplicity—no accounts, no sign-ups, and no hidden settings—makes it accessible for users who need a straightforward solution without learning complex software.
When to Use a Text Watermark Instead of Other Methods
A text watermark is often the best choice when you need a visible, customizable label that doesn’t obscure the image’s main content. Unlike image-based watermarks (like logos), text can be adjusted for size, color, and opacity to match the image’s tone or purpose. For instance, a semi-transparent text watermark in a corner works well for portfolio previews, while a bold, centered label might be better for draft stamps or proof images. The tool’s five position options—center, top left, top right, bottom left, and bottom right—ensure the text doesn’t interfere with key visual elements. Corner positions include a margin based on the image dimensions, so the text never sits flush against the edge, even in wide or tall images.
Text watermarks are also more flexible than automatic or tiled patterns, which can look repetitive or distract from the image. With this tool, you can enter up to 120 characters, giving you room for names, dates, or short messages. The font size adjusts automatically if the text is too long for the image, scaling down while maintaining a small margin to prevent clipping. This makes it useful for images of varying sizes, from small thumbnails to high-resolution photos. For workflows where file size matters, keep in mind that the output is always a PNG, which may be larger than a JPEG source. If you need a smaller file, you can use an image compressor after applying the watermark to reduce the size without losing quality.
How to Add a Text Watermark to an Image
- Upload your image: Select a JPG, PNG, or WebP file up to 25 MiB. The tool supports local files only, so no upload to a server is required.
- Enter your watermark text: Type up to 120 characters. This can include names, dates, or short messages like "DRAFT" or "PROOF."
- Choose a position: Pick from center, top left, top right, bottom left, or bottom right. Corner positions include a margin to keep the text away from the edges.
- Set font size, opacity, and color: Adjust the font size (12–200 px), opacity (10–100%), and color using the HEX selector. Lower opacity values let the image show through the text.
- Add the watermark: Click "Add watermark" to generate a preview. The tool will scale the text down if it’s too long for the image, ensuring it fits within the margins.
- Preview and download: Inspect the watermarked image in the preview. If it looks correct, download the new PNG file, which will have "-watermarked" added to its name.
Common Use Cases for Text Watermarks
| Use Case | Example Text | Recommended Position | Opacity Range |
|---|---|---|---|
| Portfolio previews | "© 2026 Your Name" | Bottom right | 30–50% |
| Draft stamps | "DRAFT" | Center | 50–70% |
| Event names | "Summer Festival 2026" | Top right | 40–60% |
| Review labels | "APPROVED" | Top left | 70–90% |
| Proof images | "PROOF - NOT FINAL" | Center | 60–80% |
Each use case benefits from a different combination of position, opacity, and text. For example, portfolio previews often use a subtle, semi-transparent watermark in a corner to avoid distracting from the image. Draft stamps or proof labels, on the other hand, may use a bolder, more opaque text in the center to ensure visibility. The tool’s flexibility allows you to experiment with these settings until the watermark suits your needs.
What Happens If the Text Doesn’t Fit the Image?
The tool automatically measures the text before applying it to the image. If the text is too long or the font size is too large for the available space, it scales the font down proportionally while maintaining a small margin. This ensures the entire label remains visible without clipping. For very small images, the font size may drop below the minimum requested size (12 px) to fit the text safely. This behavior is intentional—preserving the full text inside the image is prioritized over strict adherence to the requested font size.
Opacity and color also play a role in how the watermark appears. Lower opacity values (e.g., 30%) let the image show through the text, making the watermark less intrusive. Higher opacity values (e.g., 100%) create fully opaque text, which is useful for labels that need to stand out. If the selected color blends into the image, you can choose a more contrasting color or adjust the position to improve visibility. The tool does not add outlines, shadows, or automatic contrast adjustments, so you may need to experiment with these settings to achieve the best result.
Why the Output Is Always a PNG
The tool always exports the watermarked image as a PNG, even if the source is a JPEG or WebP. This is because PNG provides a stable, lossless export format without requiring a quality slider or additional settings. While PNG files may be larger than JPEG sources, they ensure the watermark and image appear exactly as previewed, with no unexpected compression artifacts. If file size is a concern, you can use an image compressor after applying the watermark to reduce the size while maintaining quality.
PNG is also the best choice for images with transparency or sharp edges, such as logos or graphics. Since the tool preserves the original pixel dimensions of the source image, the output remains suitable for further editing or use in other workflows. For example, if you’re adding a watermark to a logo for a client preview, the PNG output ensures the logo’s edges stay crisp. If you need a JPEG for web use, you can convert the watermarked PNG to JPEG using a PNG to JPG converter afterward.
Limitations and What the Tool Doesn’t Do
The Add Watermark to Image tool is designed for one specific task: placing a text label on an image with controlled settings. It does not support image-based watermarks (like logos), tiled patterns, or automatic contrast adjustments. The text is drawn using a bold system sans-serif font with a middle baseline, and there are no options for custom fonts, outlines, or shadows. These limitations are intentional—they keep the workflow simple and predictable, ensuring the tool works reliably for its intended purpose.
The tool also does not provide cryptographic protection, digital rights management, or proof of authorship. A visible watermark can discourage casual reuse, but it can still be cropped, retouched, or covered. For legal ownership or professional stock delivery, you’ll need additional documentation and controls specific to your workflow. The tool is best suited for workflows where a visible text label is sufficient, such as internal reviews, drafts, or portfolio previews.
Input validation ensures the tool works smoothly. It rejects empty files, unsupported file types, files over 25 MiB, images with invalid dimensions, edges above 20,000 pixels, images above 40 megapixels, and text that is blank or too long. Font size, opacity, color, and position are validated when you click "Add watermark," so you’ll receive clear feedback if something is incorrect. The tool also prevents old results from replacing newer ones if you change the file or settings mid-task, ensuring you always see the most recent preview.