Resize Image for Instagram Story (1080×1920)

Resize a photo to exactly 1080×1920 pixels — the full-screen 9:16 portrait size Instagram Stories expect. Crop, frame, and download in seconds.

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

Instagram Stories display full-screen on a phone at a 9:16 ratio, and any image that doesn't match gets letterboxed with blank bars above and below, or cropped unpredictably by Instagram's own auto-fit. A landscape photo or a standard square post image looks noticeably worse dropped straight into a Story compared to one pre-cropped to 1080×1920 — the difference between a professional-looking Story and one with awkward black bars comes down entirely to getting this one dimension right before uploading.

Step by step

  1. 1
    Open the Image Resizer
    The dimensions are already set to 1080×1920 — drop in your photo.
  2. 2
    Frame the crop
    Drag the crop area to a tall 9:16 region — keep your subject in the middle third since Instagram overlays UI elements near the top and bottom.
  3. 3
    Preview
    Check the full-screen preview to confirm nothing important is cut off.
  4. 4
    Download
    Save the 1080×1920 image to your device.
  5. 5
    Post to Stories
    Upload directly — no letterboxing, no unexpected crop.

Frequently asked questions

What is the exact Instagram Story size?

1080×1920 pixels, a 9:16 portrait aspect ratio, matching a standard phone screen.

Why does my photo show black bars on Stories?

Instagram letterboxes any image that doesn't match the 9:16 ratio rather than stretching it. Resizing to exactly 1080×1920 first eliminates the bars.

Do my Story photos leave my device?

No. Resizing runs entirely in your browser using the Canvas API — nothing is uploaded, which matters for personal photos headed to social media.

Where should I keep the important content in the frame?

Instagram's own UI (profile name, reply bar, stickers) overlaps roughly the top and bottom 250px of a Story. Keep faces and text in the middle 70% of the frame.

Is this the same size as a Reel?

Yes — Reels use the same 1080×1920 (9:16) full-screen format as Stories.

Can I resize several photos to Story size at once?

Yes — use the Batch Photo Editor with a 1080×1920 crop applied to every image in a folder.

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

Further reading

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