Image Resizer
Set a precise width and height, keep the original aspect ratio when needed, and optionally generate an image with a target file size.
Privacy: images are processed locally in your browser, are not uploaded, and downloads are generated on your device.
About this tool
Set a precise width and height, keep the original aspect ratio when needed, and optionally generate an image with a target file size.
How to use it
- Upload an image.
- Enter the target width and height, choose an output format, and optionally set a target file size.
- Preview and download the resized image.
Common uses
- Standardize article image widths
- Prepare social media graphics
- Create website thumbnails
Supported formats
Things to know
- This static tool processes every image locally in your browser. Files are not uploaded, and downloads are generated on your device.
- Upscaling cannot restore missing detail and may make the image look soft. Start with the highest-resolution source available.
FAQ
What does lock aspect ratio do?
It recalculates the other dimension automatically so the image is not stretched or distorted.
Can I resize multiple images at once?
This resizer currently handles one image at a time.
Related image tools
Image Compressor
Compress JPG, JPEG, PNG and WebP images online. Choose an output format, adjust quality and download the result without uploading your file.
Image Stitcher
Combine multiple images into one vertical strip or horizontal comparison. Control order, spacing, background color and output format.
Social Media Image Size Guide
Reference common image sizes and aspect ratios for YouTube, TikTok, Instagram, Facebook, X, WeChat, Xiaohongshu and Bilibili.