Slack compresses profile pictures aggressively. If you upload a massive 4000px wide photo, Slack's resizer does a bad job.
Pro Tip: Resize and convert your photo to a 1024x1024 JPG before uploading. You control the quality, not Slack.
Your Slack photo looks pixelated? It is a resizing issue.
Convert your files to be fully compatible with Slack.
Slack compresses profile pictures aggressively. If you upload a massive 4000px wide photo, Slack's resizer does a bad job.
Pro Tip: Resize and convert your photo to a 1024x1024 JPG before uploading. You control the quality, not Slack.