Hidden Watermark Checker

Inspect image metadata, EXIF hints, alpha transparency, and suspicious local signals in your browser.

Checks

Metadata, alpha, RGB

Best For

Privacy review

Runs In

Your browser

Analyze an image locally

Upload a screenshot, export, or original image to inspect metadata, transparency, and common browser-visible signals. The file stays on your device during analysis.

No image selected yet

Start with a PNG, JPG, WEBP, GIF, or BMP image. This tool looks for common metadata and transparency clues, but it does not guarantee detection of every invisible watermark.

What this tool checks

The checker focuses on signals you can inspect locally in the browser: EXIF blocks, PNG text chunks, authoring software fields, GPS presence, alpha transparency, and RGB channel previews. It is designed for fast privacy review before you share screenshots or exports.

What it cannot promise

Invisible watermarks are often platform-specific and may survive only under proprietary detection methods. A clean result here does not prove the image is free of hidden tracking marks, fingerprinting, or service-side identifiers.

Local processing

This MVP is designed to run in the browser. The selected image is decoded locally to inspect metadata and render channel previews, so you can do a first-pass privacy check without sending the file to a remote server.

How to use it

1. Upload a screenshot, exported image, or original file. 2. Review the metadata and risk summary first. 3. Check whether alpha transparency or PNG text chunks exist. 4. Compare the RGB channels if you suspect extra marks or patterns. 5. If needed, re-export the image and test the cleaned copy again.

Why hidden watermark checks need cautious wording

Most consumer screenshots do not expose every embedded signal in a way that a browser tool can verify. The useful job of this page is to catch obvious metadata leaks, transparency layers, and suspicious authoring traces before you share a file, not to promise a perfect yes-or-no watermark verdict.

Use it as a lightweight pre-share audit for screenshots, AI images, exports, product images, or edited files. It surfaces file format, size, dimensions, metadata hints, transparency, and per-channel previews in one place.
JPEG parsing focuses on common EXIF tags such as Software, Make, Model, DateTime, and GPS presence. PNG parsing checks readable tEXt and iTXt chunks. The transparency scan and RGB channel previews are generated from the decoded browser image, not from a server pipeline.
Run this before posting screenshots from work tools, sharing generated images with clients, uploading portfolio exports, or distributing assets you want to flatten. It is also useful when comparing an original image to a cleaned re-export.
Can this detect every hidden watermark? No. Some invisible watermarks rely on proprietary detection methods and are not exposed through ordinary browser-visible metadata. Does it upload the image? This MVP is designed for local browser analysis and does not need a server upload to inspect the file. Why does alpha transparency matter? Transparency does not equal a watermark, but it can carry extra information layers that are worth reviewing before you share the file. Why do PNG and JPEG results differ? They store metadata differently. JPEG often uses EXIF, while PNG commonly uses text chunks or no readable metadata at all.

Herramientas relacionadas

Continua con la siguiente comprobacion que mejor encaje con el problema que estas revisando.

Centro de diagnóstico

Empieza por el síntoma

Recomendado primero

Comprobacion de camara

Previsualiza camaras web, captura PNG y revisa resolucion y FPS negociados.

Abrir herramienta

Prueba de pantalla

Prueba resolucion, frecuencia de actualizacion, pixeles muertos y precision de color.

Abrir herramienta

Prueba de color de pantalla: grises, degradados y uniformidad

Comprueba escala de grises, degradados, detalle en sombras y luces, transiciones RGB y uniformidad del panel a pantalla completa.

Abrir herramienta