What is an ICC profile?

An ICC profile is a standardized data block, defined by the International Color Consortium, that describes how a device or color space reproduces color. Embedding one in an image lets color-managed software display the same colors consistently across monitors and printers.

Which image formats are supported?

JPEG profiles stored in APP2 ICC_PROFILE markers and TIFF profiles in tag 34675 are decoded directly. PNG profiles live in a zlib-compressed iCCP chunk; the tool detects them but cannot decompress without a library, so it tells you to try a JPEG or TIFF.

What does rendering intent mean?

Rendering intent is how out-of-gamut colors are mapped when converting between color spaces. The four ICC intents are perceptual, media-relative colorimetric, saturation, and ICC-absolute colorimetric. The viewer reads the value stored in the profile header.

Why does my image show no ICC profile?

Many images have no embedded profile and are assumed to be sRGB. That is normal for web images and screenshots. The viewer reports when no ICC_PROFILE marker, iCCP chunk, or TIFF profile tag is present.

Is my image uploaded to a server?

No. The image is read locally with the browser FileReader API and the profile bytes are decoded in JavaScript. The picture never leaves your device, which is ideal for confidential or unpublished images.

ICC Color Profile Viewer

A color-managed image can carry an ICC profile — a block of data defined by the International Color Consortium that tells software exactly how its colors should be interpreted. When colors look wrong across devices, the embedded profile is usually the first thing to check. This viewer extracts and decodes that profile in your browser.

How it works

The tool locates the raw ICC bytes inside the image container, then decodes the standard 128-byte ICC profile header:

Extraction. In a JPEG it reads APP2 segments tagged ICC_PROFILE and reassembles multi-part profiles in sequence; in a TIFF it reads tag 34675 from the first IFD. PNG profiles are detected in the iCCP chunk but are zlib-compressed, so it flags them rather than guessing.
Header decode. From the header it reads the profile size, CMM, version, device class (mntr, prtr, scnr, etc.), color space, profile connection space (PCS), creation date, primary platform, and the rendering intent.
Tag table. It then reads the tag count and walks the tag table, listing each tag’s four-character signature, offset, and size, and decoding the human-readable desc / mluc description tag.

Example

A typical display profile shows device class Display device (monitor), color space RGB, PCS XYZ, rendering intent Perceptual, and a description such as Display P3 or sRGB IEC61966-2.1. The tag table lists entries like wtpt (white point), rXYZ / gXYZ / bXYZ (colorant matrix), and desc.

Notes

A missing profile is not an error — most web images simply assume sRGB. The viewer is read-only and runs entirely on your device, so you can inspect the color setup of confidential or print-bound images without sending them anywhere.