Batch Watermark 100+ Photos — Custom Logo & Text Copyright, Processed Locall

Yes — logo watermarks are fully supported. Upload your brand logo as a PNG file. If your logo has a transparent background (the most common format for brand logos), the transparent areas blend naturally over your photos — there is no visible white or coloured rectangle behind the logo. If your logo is on a white background, the white area will appear as a white block over your photos; in this case, use a version of your logo exported with transparency from your design tool. Supported logo formats: PNG (recommended for transparency), JPG, and WebP.

Yes — batch watermarking is the primary use case this tool is built for. Upload as many JPG, PNG, or WebP images as you need (hundreds are supported), configure your watermark once (text or logo, opacity, size, position), and click Apply. The watermark is applied identically and proportionally to every image in the batch simultaneously. Download all watermarked images as a single ZIP file. The position stays consistent across the entire batch — essential for brand consistency in photography deliveries, product catalogs, and content libraries.

Use the opacity slider in the watermark settings panel. The slider runs from 0% (fully transparent, invisible) to 100% (fully opaque, solid). For portfolio photography, 20–40% opacity produces a watermark that is visible enough to identify the source but subtle enough to not dominate the image. For e-commerce product photos, 50–70% is more appropriate. For stock/preview images where the watermark must prevent commercial use, 60–80% opacity with a centered position is most effective. You can preview the opacity in real time before processing. For logo watermarks: use a PNG with a transparent background — this allows the logo to blend over photos without any opaque rectangle behind it.

Yes — when you download the processed images, the watermark is permanently fused into the pixel data of each photo. There is no separate watermark layer that can be toggled off. This is intentional: a permanent, pixel-level watermark is far more resistant to removal than a metadata-only tag. The original photos you uploaded are not modified — only the downloaded copies contain the watermark. If you need to create unwatermarked versions later, keep your original files and re-upload them.

A visible watermark is a deterrent, not an absolute technical barrier. Determined individuals with access to AI-based inpainting tools can remove corner watermarks from photos with plain backgrounds. However, several strategies significantly increase removal difficulty: placing the watermark over the main subject (not just a corner), increasing opacity to 50%+, using a repeating tile pattern that covers the entire image, and choosing a watermark that overlaps areas of complex detail (faces, textures) rather than plain backgrounds. No watermark is completely removal-proof, but a well-placed, appropriately opaque watermark deters the vast majority of casual image theft.

Adding a text or logo watermark typically increases file size by 1–5% for JPG images and 2–8% for PNG images. The increase is small because the watermark modifies only a relatively small portion of the pixel data. If file size is a concern after watermarking — for example, you need watermarked photos under 1MB for a web upload — use the Compress Image tool after watermarking. You can also compress and watermark in a single workflow: watermark first, then compress the downloaded batch.Need to compress watermarked photos after download? Use Image Compressor

No — and in most jurisdictions, it is illegal. Watermarks exist to assert and protect intellectual property rights. Removing a watermark from a copyrighted image you do not own constitutes copyright infringement under laws including the US Digital Millennium Copyright Act (DMCA) and equivalent legislation in the EU, UK, and most other countries. This tool adds watermarks to your own images — it does not have watermark removal functionality. If you need to use a watermarked image, contact the copyright holder and request a licensed, unwatermarked version. If you have lost your own original unwatermarked files and need to recover them, professional photo restoration services exist for this specific purpose.

Yes — this tool supports any custom text, including CONFIDENTIAL, DRAFT, SAMPLE, FOR REVIEW ONLY, or DO NOT DISTRIBUTE. Set the text to a large size (so it spans a significant portion of the document width), choose red or grey depending on your organization's convention, and set opacity to 40–65% — high enough to be immediately visible, low enough that the underlying content remains readable. For maximum crop-resistance, position the watermark diagonally across the center of the document. If you have a multi-page document, convert pages to images, batch upload, and process all pages simultaneously in one operation.

Yes — this tool runs entirely in your mobile browser and works on iPhone and Android without installing any app. Open the tool in Safari (iPhone) or Chrome (Android), upload your photos from your camera roll, configure your watermark, and download the watermarked images directly to your device. No app download, no sign-up required. For iPhone users: after downloading, the watermarked images save to your Photos library automatically. For batch processing on mobile, uploading multiple images from the camera roll is supported — select multiple files when prompted by the upload button.