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Upload your image
Choose a PNG, JPG, JPEG or WebP file. The browser sends it to the Node.js image backend on your website.
NODE.JS • BACKEND IMAGE PROCESSING
Gemini Watermark Remover
process images on the server.
Upload an image, choose the visible watermark area, send it to your Node.js backend, review the processed output, reset the session, and download a cleaned image in the same format as the upload. Maximum upload size: 100 MB. Uploaded source files are removed after processing, and generated results are automatically deleted after 5 minutes.
Image Watermark Remover
Upload an image
PNG, JPG, JPEG or WebP
Maximum file size: 100 MBImage processing is handled by the Node.js backend.
01
How to remove watermark?
From upload to download in four clear steps.
⌖
Select the watermark
Use automatic detection for a small lower-right mark or select a custom rectangular area manually.
✦
Process on the backend
The backend decodes the image, creates an inpainting mask, reconstructs the selected pixels, and keeps the uploaded PNG/JPG/JPEG/WebP format for the download.
✓
Compare & download
Review the Before and After previews. Reset the session when needed and download the processed image in the original file format.
BEFORE → AFTER
What happens to the watermark?
The visible watermark is treated as an overlay region. The backend uses neighbouring image pixels to estimate replacement content rather than simply painting a solid colour over the mark.
This works best on small overlays and backgrounds where nearby pixels contain useful visual information.
BEFORE
✦
→
AFTER
02
Features
Built around backend processing and a simple visitor workflow.
Node.js backend processing
Image files are processed by your Node.js application rather than only in the browser.
100 MB maximum
Uploads larger than 100 MB are rejected by both the browser and the server.
Automatic detection
A restricted lower-right detector looks for a small bright visible mark before using a compact fallback area.
Manual selection
Let visitors choose the exact watermark area when automatic detection is not suitable.
Before & After
The result preview uses the actual processed output returned by the backend.
Reset to new upload
Reset clears the active session and brings the full upload screen back for the next image.
Secure file names
Uploaded and generated files use random IDs instead of the user's original filename.
Rate limiting
The processing endpoint includes a request-rate limit to reduce automated abuse.
Responsive layout
The interface works across desktop, tablet and mobile-sized screens.
No watermark API
The backend does not require a paid watermark-removal API for the included processing engine.
03
Backend image processing
What happens after the user clicks Remove Watermark?
01
Validate
Node.js checks the MIME type, file extension, 100 MB upload limit and decoded image dimensions.
02
Decode
Sharp decodes the image to raw pixels while preserving the source dimensions.
03
Inpaint
The backend reconstructs the selected region from nearby known pixels using a lightweight iterative inpainting routine.
04
Encode
The processed pixels are encoded using the same format as the uploaded image and served as the downloadable result.
Use the utility only with images you own or are authorized to edit. It edits visible pixels and does not remove invisible provenance information. This independent project is not affiliated with Google or Gemini.
04
Frequently asked questions
Common questions about the Node.js backend edition.
Does this version really process the image on the backend?
Yes. The browser sends the selected image to the Node.js `/api/remove-image` endpoint. The backend validates, decodes, processes and encodes the image before returning the result URL.
What is the maximum file size?
The maximum source file size is 100 MB. Larger files are rejected on the client and server.
Does it need a paid API?
No paid watermark-removal API is required for the included image processing routine.
Can I select another watermark position?
Yes. Select Watermark lets you draw a rectangle over the visible overlay and send those coordinates to the backend.
Will every watermark be removed perfectly?
No. The backend estimates pixels from nearby content. Large overlays, detailed text, faces and complex backgrounds can still leave artifacts.
Are uploaded images kept forever?
No. The server deletes the source upload after processing, and generated output files older than 5 minutes are automatically cleaned up.
Can I publish this on cPanel with Node.js?
Yes, provided your hosting offers a Node.js application environment. The project uses `server.js` as the startup file and reads the hosting-provided `PORT` variable.