Resize Image Online
Resize JPG, PNG, and WebP images by exact pixel dimensions or percentage without losing clarity.
Choose an image or drag & drop
Supports JPG, PNG, WebP, GIF, and BMP
What is Resize Image?
Resize Image is a free online tool to process your files securely in your browser. Our tool ensures your data remains private while delivering fast results. No installation or registration is required.
该工具利用先进的 Web 技术完全在您的设备上运行。这意味着您的文件绝不会上传到我们的服务器。
Need to shrink file size in KB or MB after resizing? Compress image file size with Image Compressor →
Want to convert your photo between JPG, PNG, and WebP? Convert image formats with Image Converter →
Need a transparent background cutout for your photo? Remove image backgrounds automatically →
Want to bundle your resized photos into a multi-page PDF? Convert images into a PDF document →
主要特点
Exact Pixel Controls
Enter custom pixel dimensions for width and height with automatic aspect ratio calculation to prevent distortion.
One-Click Scale Presets
Scale images down to 50%, 75%, or up to 200% with a single click using standard ratio presets.
In-Browser Privacy
Processed locally via your browser graphics hardware. Photos are never uploaded or stored on remote servers.
Multi-Format Export
Export resized graphics as JPG, PNG, or modern high-efficiency WebP images with custom compression control.
常见应用场景
- ▸Social Media Headers & Posts: Resize graphics to match Instagram, Twitter/X, LinkedIn, and Facebook banner specifications.
- ▸Website & Blog Optimization: Scale oversized camera photos down to web-friendly widths (e.g. 1200px or 1920px) for faster page loading.
- ▸Passport & Identity Photos: Resize portrait photos to exact dimension requirements for visa and job applications.
- ▸Email Attachments & Signatures: Shrink photo dimensions so they embed seamlessly into newsletters and personal emails.
常见问题解答
关于 Resize Image 的常见问题解答。
Upload your image using the box above, adjust the target width or height in pixels (or click a quick percentage preset like 50%), choose your output format, and click "Resize Image". Download your newly resized picture instantly.
No. By default, "Lock Aspect Ratio" is enabled. When you type a new width, the height calculates automatically to maintain your image’s original proportions perfectly.
No. Our image resizer runs entirely inside your browser using HTML5 Canvas graphics acceleration. Your private images are never uploaded or transmitted over the internet.
You can upload and resize JPG, JPEG, PNG, WebP, GIF, and BMP files. You can also convert between JPG, PNG, and WebP during export.
Upscaling any raster image beyond its original pixel dimensions requires interpolation. While our high-quality smoothing algorithm softens pixelation, we recommend using original high-resolution assets whenever possible.
Because processing happens on your local device, you can resize high-resolution camera photos up to several hundred megapixels depending on your available RAM.