Resize Image for Discord (512×512 Avatars & Emoji)

Resize a photo or graphic to 512×512 pixels — the size Discord recommends for uploading avatars and custom emoji. Crop to a clean square and download.

Last updated

Use it right here — already set up for this task

画像リサイズ

画像をオンラインでリサイズ

カスタムサイズまたはSNSプリセットに画像をリサイズ。ブラウザ内で動作 - アップロード不要。

クリックしてアップロードまたはドラッグ&ドロップ

PNG、JPG、WebP(最大50MB)

画像をアップロードして開始

共有

画像リサイズについて

無料の画像リサイズツールで、任意のカスタムサイズに画像をリサイズしたり、人気のSNSプリセットから選択したりできます。Instagram、Facebook、Twitter、YouTubeなどの画像最適化に最適です。

機能：

  • カスタム幅と高さのコントロール
  • アスペクト比を保持するトグル
  • SNSプラットフォーム用のクイックプリセット
  • PNG、JPG、WebP形式のサポート
  • 完全にブラウザ内で動作 - 画像はサーバーにアップロードされません
  • 登録不要、透かしなしで完全無料

参考資料・技術仕様

最終更新日: 2026-03-10

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画像圧縮

画質を保ちながらファイルサイズを削減。

画像形式変換

PNG、JPG、WebP形式間で変換。

一括写真編集

複数の写真を同じアスペクト比で一度にトリミング。

Open the full Image Resizer →

Why this matters

Discord recommends uploading avatars and custom emoji at 512×512, even though it displays them much smaller — around 128×128 for a standard avatar thumbnail and even smaller for emoji in chat. The extra resolution matters because Discord's own client re-scales the image for retina displays, larger profile views, and emoji picker previews; uploading something already small and low-resolution looks visibly soft once Discord scales it back up. Starting from a properly cropped 512×512 square avoids that blur across every place Discord displays it.

Step by step

  1. 1
    Open the Image Resizer
    The dimensions are already set to 512×512 — drop in your avatar or emoji source image.
  2. 2
    Crop to a clean square
    Center your face or icon so nothing important sits at the very edge, since avatars display as circles in most views.
  3. 3
    Preview
    Check the preview to make sure the subject stays centered once the corners are cropped away.
  4. 4
    Download
    Save the 512×512 image to your device.
  5. 5
    Upload to Discord
    Use it as your server or user avatar, or add it as a custom emoji in a server with emoji slots available.

Frequently asked questions

What size does Discord recommend for avatars?

Discord recommends uploading at 512×512, even though the avatar displays at roughly 128×128 in most views — the extra resolution keeps it sharp on high-DPI screens.

Is 512×512 also the right size for custom emoji?

Yes for the upload — Discord accepts up to 512×512 for custom emoji uploads (max 256 KB file size), then displays them much smaller in chat, typically around 32×32 to 48×48.

Is my image uploaded to a server to resize it?

No. Resizing runs entirely in your browser before you manually upload the result to Discord.

Why does my avatar look blurry on Discord?

Usually because the original upload was smaller than 512×512 and Discord scaled it up for larger displays like the profile popup. Upload at 512×512 or larger to avoid this.

Does Discord crop avatars into a circle?

Yes — avatars display as circles throughout the app. Keep your subject centered so nothing important gets clipped at the corners.

What if my emoji file is too large for Discord?

Discord caps custom emoji uploads at 256 KB. Resize to 512×512 here, then compress with Compress Image to 200 KB if the file is still too big.

Try Image Resizer now
Free, private, no signup. Runs in your browser.
Open Image Resizer →

Further reading

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