Resize Image
Resize JPG, PNG and WebP images to exact pixels, percentage, or social media presets. Batch supported. 100% private — files never leave your browser.
Height auto-calculated to keep proportions
Drop images here or click to browse
Multiple files supported · JPG, PNG, WebP, GIF, BMP
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How to Resize an Image Online
Upload your images
Drag and drop JPG, PNG or WebP images, or click to browse. Batch resize multiple images at once.
Set your dimensions
Enter exact width and height in pixels, scale by percentage, or pick a preset like Instagram Post or Full HD.
Download resized images
Get perfectly resized images in seconds with sharp quality. Download one by one or all at once.
Frequently Asked Questions
How do I resize an image without losing quality?
Use our two-step high-quality scaling with quality at 85-95%. Downscaling (making images smaller) keeps images sharp. Avoid upscaling beyond 200% as no tool can invent detail that was never captured.
How do I resize an image to exact pixels?
Choose By Dimensions mode, unlock the aspect ratio if needed, and type your exact width and height in pixels. Presets for Instagram, YouTube, Twitter and Full HD are also one click away.
Can I resize multiple images at once?
Yes. Drop multiple images together and press Resize All. Every image gets the same dimensions or percentage, and you can download them individually or all at once.
Will resizing keep my image proportions?
Yes, by default the aspect ratio is locked and height is auto-calculated from your width. Unlock the ratio only if you intentionally want exact custom dimensions.
What is the best size for Instagram posts?
1080×1080 pixels for square posts and 1080×1920 for stories. Both are available as one-click presets in this tool.
Is it safe to resize images online here?
Completely safe. Resizing happens entirely in your browser - your images are never uploaded to any server, never stored, never seen by anyone.
Can I make an image larger (upscale)?
Yes, use By Percentage mode with values above 100% (up to 200%). Note that upscaling cannot add real detail, so slight softness is normal.
Which format should I choose after resizing?
Auto picks the best format for you. WebP gives the smallest files, JPEG is universal for photos, and PNG preserves transparency for logos and graphics.
Last updated: July 11, 2026 · FlipMyFormat Image Resizer
Written and maintained by the FlipMyFormat team