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.

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Use it right here — already set up for this task

图片调整大小

在线调整图片大小

调整图片为自定义尺寸或社交媒体预设。在浏览器中运行 - 无需上传。

点击上传或拖放

PNG、JPG、WebP(最大50MB)

上传图片以开始

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关于图片调整大小

我们的免费图片调整大小工具可让您将图片调整为任何自定义尺寸,或从流行的社交媒体预设中选择。非常适合为Instagram、Facebook、Twitter、YouTube等优化图片。

功能：

  • 自定义宽度和高度控制
  • 保持长宽比切换
  • 社交媒体平台快速预设
  • 支持PNG、JPG和WebP格式
  • 完全在浏览器中运行 - 图片不会上传到服务器
  • 完全免费,无需注册或水印

使用方法

  1. 上传图片 — 拖放或点击上传PNG、JPG或WebP图片。
  2. 设置尺寸 — 输入自定义宽度和高度，或选择社交媒体预设。
  3. 调整图片大小 — 点击“调整图片大小”，即可在浏览器中生成新尺寸的图片。
  4. 预览结果 — 查看调整后的图片预览，确认新尺寸符合您的需求。
  5. 下载调整后的图片 — 点击下载按钮将调整后的图片保存为原始格式。

常见问题

可以为社交媒体调整图片尺寸吗？

可以！我们内置了Instagram帖子、Instagram快拍、Facebook封面、Twitter标题、YouTube缩略图和高清分辨率等预设。

调整大小会影响图片质量吗？

放大可能会降低清晰度，但缩小能较好地保持质量。使用长宽比锁定可以防止变形。

支持调整哪些文件格式？

可以调整PNG、JPG/JPEG和WebP图片（最大50MB）的大小。

调整大小后的图片以什么格式保存？

与您上传的格式相同：PNG仍为PNG，JPG仍为JPG，WebP仍为WebP。如需更改格式，请使用图片格式转换工具。

图片调整大小会将文件上传到服务器吗？

不会。所有处理完全在浏览器中完成。文件永远不会离开您的设备，确保完全的隐私和安全。

支持的最大图片尺寸是多少？

您可以调整最大50 MB的图片。新的宽度和高度各自最多可达16,384像素，这是浏览器能够稳定绘制的最大尺寸。

标准与参考资料

最后更新: 2026-09-28

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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?

Partly — the Batch Photo Editor can crop a whole set of photos to the 9:16 Story shape at once, then resize each one to 1080×1920 here.

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

Further reading

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