Image HDR Highlight Online Tool

Embed an HDR ICC profile into PNG / JPEG / WebP images so they display at higher brightness on HDR-capable devices.

Upload Image

Click or drag an image here

Supports PNG / JPEG / WebP images

Pure front-end byte-level processing; images never touch any server

HDR ICC Profile

Mode 1 PQ

Rec. ITU-R BT.2100 PQ

Mode 2 Rec2020 + PQ

Rec2020 Gamut with PQ Transfer

Custom ICC

Upload an .icc / .icm profile file

Both use the PQ (Perceptual Quantizer) transfer function. Mode 1 is based on the BT.2100 gamut, Mode 2 uses the wider Rec2020 gamut.

How to Use

1. Choose an HDR ICC profile (Mode 1 by default) or upload a custom .icc file.

2. Upload a PNG / JPEG / WebP image (format is detected from the file header). The HDR image is generated automatically.

3. Compare the preview and download; "_hdr" is appended to the filename. Switching profiles regenerates instantly for easy comparison.

How It Works

Principle

This tool never modifies pixel data. It only embeds an HDR ICC profile with the PQ transfer function at the container byte level. The browser's color management system then interprets pixels along the HDR curve, presenting higher brightness on HDR displays. Supports PNG (iCCP), JPEG (APP2 ICC) and WebP (ICCP, experimental).

Effect Notes

The highlight effect depends on HDR support of both the device and the browser (e.g. iPhone, Mac, HDR monitors). On unsupported devices the image looks unchanged, but the file itself is distributable — anyone who receives it will see HDR highlights on supported devices.