Image Resizer
Resize images by exact dimensions or percentage ratio. Maintain aspect ratio, adjust quality, and download instantly — all in your browser.
About Image Resizer
Overview
The Image Resizer tool lets you resize any image by exact pixel dimensions or by percentage ratio, all within your browser. Whether you need to prepare images for social media, web publishing, or email, this tool handles it efficiently without uploading your files to any server. Choose from preset sizes for popular platforms like Instagram, Facebook, Twitter, YouTube, and LinkedIn, or enter custom dimensions. Lock the aspect ratio to prevent distortion, adjust output quality for smaller file sizes, and download the result instantly.
Features
- Resize by exact pixel dimensions or percentage ratio
- Lock aspect ratio to prevent image distortion
- Preset sizes for Instagram, Facebook, Twitter, YouTube, LinkedIn, and more
- Common size presets: 720p, 1080p, 4K, favicon, thumbnail
- Output format selection: keep original, PNG, JPEG, or WebP
- Adjustable quality slider for lossy formats (JPEG, WebP)
- Real-time preview of the resized image
- Multiple input methods: file upload, drag & drop, clipboard paste
- Completely browser-based — no server uploads, your data stays private
- Dark mode support and responsive design
How to Use
- Upload an image by clicking "Browse Files", dragging and dropping, or pasting from clipboard (Ctrl+V)
- Choose a resize mode: By Dimensions (enter exact pixel values) or By Percentage (scale up or down)
- Optionally select a preset size for social media or common dimensions
- Toggle "Lock aspect ratio" to maintain proportions automatically
- Adjust output format and quality if needed, then click "RESIZE IMAGE"
- Download the resized image with a single click
FAQ
Will resizing make my image look blurry?
Shrinking an image generally preserves quality well. Enlarging an image beyond its original dimensions can cause blurriness because the browser must create new pixels by interpolating between existing ones. For best results, avoid upscaling more than 150% of the original size.
What is the difference between resizing by dimensions and by percentage?
Resizing by dimensions lets you set exact pixel values for width and height, which is useful when you need precise sizes for a specific platform. Percentage mode scales the entire image proportionally — for example, 50% makes it half size, 200% doubles it.
Which output format should I choose for the smallest file size?
WebP generally produces the smallest files with good quality. JPEG is also excellent for photographs with small file sizes. PNG is best when you need transparency or lossless quality but creates larger files. Use the quality slider at 80% for a good balance.
Does resizing preserve image metadata like EXIF data?
No, when images are processed through the browser canvas, metadata such as EXIF data (camera info, GPS location, orientation) is stripped. This can actually be a privacy benefit since location data and camera details are removed from the resized output.