Resize Image for YouTube Thumbnail (1280×720)
Create a pixel-perfect YouTube thumbnail at 1280×720 in your browser. No design software needed.
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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
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
- 上传图片 — 拖放或点击上传PNG、JPG或WebP图片。
- 设置尺寸 — 输入自定义宽度和高度，或选择社交媒体预设。
- 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。
- 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。
- 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。
Why this matters
YouTube recommends 1280×720 px (16:9 aspect ratio) at under 2 MB for thumbnails. Uploading the wrong size forces YouTube to stretch or crop your image, which blurs text, cuts off faces, and reduces click-through rates. Getting the dimensions right before uploading costs 30 seconds and can meaningfully improve how your video performs in search results.
Step by step
- 1Open the Image ResizerDrop in the photo you want to use as your thumbnail.
- 2Enter 1280 × 720Type the dimensions or pick the YouTube thumbnail preset if available.
- 3Choose fit modePick "fill" to match exactly 1280×720, or "fit" to keep the aspect ratio and add padding.
- 4Adjust the cropDrag the crop area so the focal point (face, title text zone) is well-framed.
- 5DownloadSave as JPG for the smallest file size, or PNG if the thumbnail includes sharp text or graphics.
Frequently asked questions
What is the recommended YouTube thumbnail size?
1280×720 pixels (16:9), maximum 2 MB, JPG, PNG, GIF, or BMP format.
Can I upload a 1920×1080 thumbnail instead?
Yes — YouTube accepts it and will downscale. But 1280×720 is the sweet spot: it's sharp in all YouTube placements without unnecessary file size.
What's the best file format for a YouTube thumbnail?
JPG for photo-heavy thumbnails (smaller file, looks great). PNG if your thumbnail has text overlay or sharp graphics that suffer from JPG artifacts.
Is the thumbnail resized on your servers?
No. Resizing runs in your browser. Nothing is sent to a server.
YouTube compressed my thumbnail and it looks blurry — what happened?
YouTube re-encodes thumbnails at their servers. A high-contrast image with sharp edges before upload helps survive their compression. Start from a high-resolution original.
Can I resize multiple thumbnails for different videos at once?
Resize them one at a time here. To trim a whole set to the 16:9 shape first, the Batch Photo Editor can crop them all at once.
Further reading
You might also need
- Resize Images for Facebook (Posts, Cover Photos, Stories)Resize photos for Facebook posts, cover photos, profile pictures, and stories to the exact dimensions Facebook expects. No surprises, no cropping.
- Resize Images for Instagram (Posts, Stories, Reels)Resize any photo to the exact dimensions Instagram expects — square, portrait, story, reel, or profile pic. Pick a preset and download.
- Resize Images for Twitter / XResize images for Twitter / X to the exact dimensions the platform expects, from in-tweet photos to profile headers.
- Compress JPG Images Online — Free & PrivateReduce the file size of JPG and JPEG photos right in your browser. Drop in any JPEG, pick your target size, and download the compressed image. Nothing is uploaded to a server.