Image Resizer
Resize images by exact pixels, percentage, or popular presets. Aspect ratio lock included.
🖼️
Drop image here or click to upload
Supports JPG, PNG, WebP — max 20MB
Original Size
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New Size
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Original File
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New File (est.)
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Image Resizing Tips
Always lock aspect ratio (the 🔒 button) when resizing photos to avoid distortion. For web images, resize to the maximum display size you need — serving a 2000px image in a 400px slot wastes bandwidth. For print, use at least 300 DPI: an A4 sheet at 300dpi is 2480×3508 pixels.
What does "lock aspect ratio" do?
It automatically adjusts the height when you change width (and vice versa) to keep the image proportions the same, preventing stretching.
Can I make an image larger?
Yes — enter dimensions larger than the original or use a percentage over 100%. Note that upscaling reduces sharpness as no new detail can be added.
Is the tool private?
Yes — all processing happens in your browser using the Canvas API. Your image is never uploaded to any server.
What output format should I use?
For web photos: JPG or WebP. For graphics with transparency: PNG. For modern web use: WebP (smaller than JPG and PNG).