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256×256 PNG · square
Each social platform crops uploaded media to its own aspect ratio before showing it in feeds. Uploading at the platform's native size — here, Twitch feed posts — preserves the framing you intended and avoids the soft-focus that comes from the platform's own resampler. This preset outputs 256×256 PNG at the square ratio that Twitch expects.
| Output dimensions | 256×256 pixels |
|---|---|
| Aspect ratio | 1:1 (square) |
| Output format | PNG |
| Processing | 100% in your browser — no upload |
| Cost | Free, unlimited |
| Source | Official guidelines |
Audience: 240+ million monthly users.
How Twitch ranks images: discovery via category browse, follows, and recommendations from prior watches. Posting at the platform's exact native dimensions (256×256 px) preserves your original framing and avoids the softening that happens when the platform's own resampler runs to fit its expected size.
Platform-specific note: Twitch profile assets render in multiple contexts — channel header, raid notification, follow notification — making PNG with transparency the safer choice.
This preset is a deterministic recipe — every step has fixed parameters so the result is byte-identical across runs of the same input.
Twitch Profile Picture crops your input to 1:1 and resizes it to 256×256 px as PNG — a 65-kilopixel output. The work runs through canvas APIs and a WebAssembly image-encoder; the source image is decoded into an off-screen canvas, transformed in place, and re-encoded without any network upload.
Social-platform uploads frequently re-encode the file at the platform's CDN; running this preset locally before upload lets you see the exact pre-upload state. The browser-side path also means the file never leaves your device — relevant when the input contains personally identifiable information, screenshots of private documents, ID scans, or proprietary product photography.
256×256 px, saved as PNG.
The social this preset targets uses 1:1 framing. For passport photos this matches the printed-photo standard; for social posts it's the safe ratio that fills the feed without horizontal cropping.
PNG preserves hard edges and transparency that JPEG would smear. Icons, logos, and screenshots compress better as PNG when the image isn't photographic.
No. This preset runs entirely in your browser using WebAssembly + canvas APIs — no server round-trip. You can verify this in your browser's network panel: only static asset requests, no image upload. The file never leaves your device.