Share HDR PNG on Discord (Without Losing the Glow)

Discord Glow Cheat Sheet

1
Create with Flashblind Convert your image to an 8-bit indexed HDR PNG.
2
Save the File Download the result to your device. Do not copy it.
3
Drag & Drop Drop the file directly into the Discord chat window.
4
Send as File Ensure it sends as an image attachment, not a link preview.

⚠️ DO NOT PASTE: Pasting from the clipboard often strips glow data. Always upload the file directly.

Why Discord Works for HDR

Unlike a lot of apps that "helpfully" ruin images, Discord can keep your glow… if you upload it like a file and not like a meme paste.

Flashblind takes advantage of this by creating a browser-native, 8-bit indexed PNG. This format uses a specialized color palette to achieve High Dynamic Range without the massive file size of 16-bit or 32-bit images.

No Uploads: Flashblind processes everything locally on your device.
Small File Size: Indexed color keeps files light enough to help avoid aggressive compression.
Broad Compatibility: Standard PNG files open across devices, while HDR appearance depends on HDR-capable displays and app support.

Common Mistakes

If your image isn't glowing in the chat, check these common issues:

Pasting: You copied the image instead of saving the file. Clipboard operations often convert images to standard sRGB.
File Size Limits: Large files are often compressed by Discord. Flashblind's indexed PNGs are usually compact enough to avoid this.
Wrong Profile: The image must have a Rec.2020 PQ ICC profile to trigger the HDR mode on screens.

Quick Settings Checklist

For the best results on Flashblind, ensure these settings are applied (default):

Format: Indexed PNG (Color Type 3)
Bit Depth: 8-bit
Profile: Rec.2020 PQ (Perceptual Quantizer)
Dithering: Floyd–Steinberg (smoother gradients)
Quantization: Median-cut

FAQ

Can mobile users see the glow?

It depends on the device and app version. While the file contains the correct HDR data, mobile app support for rendering it varies.

Why does it look washed out on my second monitor?

HDR only works if the display supports it and HDR is enabled in your OS settings. Standard SDR monitors will display a "tone-mapped" version which looks correct but doesn't glow.

Is this safe?

Yes. It’s just a PNG with extra glow info. Flashblind runs in your browser — your images aren’t uploaded to a server.