Resize Image Online
Change image dimensions for web, social media, or print — instantly and privately in your browser.
FreeNo signupBrowser-basedBatch up to 10
About this tool
This free online image resizer lets you resize images by pixels or percentage directly in your browser. All processing happens locally using HTML Canvas — your files are never uploaded to a server.
Choose exact pixel dimensions, pick a common preset like 1920×1080 or 1080×1080, or scale by percentage. The tool preserves the original file format and maintains quality during resizing.
How it works
1. Upload one or more images (up to 10 at a time, max 10 MB each).
2. Choose a resize mode — enter exact pixel dimensions or select a percentage.
3. Click "Resize now" and download your resized images individually or as a ZIP archive.
The resizing algorithm uses high-quality bicubic interpolation to keep your images sharp. Aspect ratio is preserved by default so your photos never look stretched. If you also need to reduce file size, try our Compress Image tool.
How to resize an image without losing quality
To resize image files without losing quality, keep the original aspect ratio and avoid unnecessary upscaling. When width and height stay proportional, photos and graphics keep their natural shape instead of looking stretched.
This tool uses high-quality interpolation to keep edges smooth during resizing. It is useful when you need clean images for web pages, email campaigns, or social media posts and want to resize image assets without losing quality.
When to use image resizing
Use image resizing for websites when you need faster loading and better Core Web Vitals. Smaller dimensions help pages render faster, especially on mobile networks.
Use it for email when attachments or embedded images must stay lightweight. Resizing before sending helps reduce message size and improves delivery speed.
Use it for social media when each platform needs specific dimensions. Correct sizing helps your content display cleanly in feeds, stories, and profile areas.
Use it for uploads when forms or portals require exact width, height, or file rules. Resizing first helps you pass validation without repeated upload errors.
Why use this image resizer
You get consistent, sharp output with no visible quality loss in normal downscaling workflows.
Everything runs in your browser, so files are not uploaded to external servers.
Processing is fast and works well for one image or small batches.
The tool supports common formats including JPG, PNG, and WebP.
Controls are simple, so you can set exact dimensions quickly without extra editing software.
Frequently Asked Questions
Is this tool really free?
Yes, 100% free with no limits on usage. There are no watermarks, no sign-up required, and no hidden fees.
Are my images uploaded to a server?
No. All resizing happens directly in your browser using HTML Canvas. Your images never leave your device.
What image formats are supported?
The tool supports JPG/JPEG, PNG, and WebP. The output format is always the same as the input — no conversion happens.
Can I resize multiple images at once?
Yes, you can upload up to 10 images and resize them all with the same settings in one batch. Download them individually or as a single ZIP file.
Will resizing reduce image quality?
Downscaling (making images smaller) preserves quality well. The tool uses high-quality interpolation. Upscaling is disabled by default to avoid blurry results — uncheck "Do not enlarge" if you need it.
What is the maximum image size?
Each file can be up to 10 MB and up to 8000 pixels on the longest side. You can process up to 10 files per batch.
How to resize an image without losing quality?
Start with a high-resolution source image, keep aspect ratio enabled, and avoid enlarging small files. Downscaling with high-quality interpolation gives the best clarity for most use cases.
What is the best image size for web?
For most websites, 1200 to 1920 pixels on the long side works well for hero images, while content images are often smaller. Choose dimensions based on your layout and keep file size optimized for faster loading.
How to resize images for Instagram?
Common Instagram targets are 1080×1080 for square posts, 1080×1350 for portrait posts, and 1080×1920 for Stories. Resize to the exact format you need before uploading to avoid unwanted cropping.