图片尺寸调整器
Resize to exact pixels, by percentage, or using 12 social media presets (TikTok, Instagram, YouTube, OG image…). Output as PNG, JPEG or WebP. No upload.
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将图片拖到此处或点击选择
PNG, JPG, WebP, GIF…
免费图片尺寸调整工具 — 适用于任何平台或用途
Resizing images is one of the most common tasks in web design, content creation and social media management. This free image resizer handles it directly in your browser — no upload, no server, no file size limit, no watermark. Your image stays on your device throughout.
三种调整模式
- 精确像素 — specify width and height in pixels. Lock the aspect ratio to prevent distortion.
- 百分比 — scale up or down relative to the original size. 50% = half the size. 200% = double.
- Social media presets — 12 one-click presets: TikTok (1080×1920), Instagram square (1080×1080), Instagram portrait (1080×1350), YouTube thumbnail (1280×720), Twitter/X post (1600×900), Facebook cover (1640×624), LinkedIn (1200×627), OG image (1200×630), Favicon 16×16, Favicon 32×32, App icon 512×512.
输出格式
- JPEG — best for photographs. Adjustable quality slider. 80–85% is a good balance for web use.
- PNG — lossless. Best for screenshots, logos, illustrations and transparent images.
- WebP — Google's modern format, 25–35% smaller than JPEG at equivalent quality. Supported by all modern browsers.
常见使用场景
- Resize a phone photo (4000×3000px, 3–10 MB) to web-ready size (1200×900px, under 200 KB).
- Create social media images at exact platform specifications.
- Generate multiple icon sizes from a single high-resolution source.
- Create a favicon from a larger logo.
隐私
Your image is processed entirely in your browser using the HTML5 Canvas API. It is never uploaded to any server. No image data is transmitted, stored or logged.
常见问题
- 图片调整器会将我的照片上传到服务器吗?
- 不会。图片调整器完全在您的浏览器中使用 HTML5 Canvas API 运行。您的图片永远不会被上传、传输或存储在任何服务器上。一切都保留在您的设备上。
- 可以调整和导出哪些图片格式?
- 您可以拖放浏览器能解码的任何图片(PNG、JPG、WebP、GIF、BMP)。输出时,您可以在 JPEG(更小的文件)、PNG(无损质量)或 WebP(最佳现代压缩)之间选择。JPEG 和 WebP 的质量可调。
- 如何为社交媒体调整图片大小?
- 选择「社交媒体预设」模式,从 12 个一键预设中选择,包括 TikTok(1080x1920)、Instagram 正方形(1080x1080)、YouTube 缩略图(1280x720)、Twitter/X 帖子(1600x900)等。工具会立即将图片调整到精确的平台尺寸。
- 可以一次调整多张图片吗?
- 此工具专为单张图片的精确调整设计,带有实时预览。如果需要批量处理多张图片,请使用我们的批量图片优化器,它支持一次转换数百张图片并下载 ZIP 文件。
- 图片调整器免费吗?有任何限制吗?
- 完全免费,没有文件大小限制、无需注册、不添加水印。由于处理在浏览器中进行,唯一的限制是设备内存。您可以导出最大 10000x10000 像素的图片。