Free private image tool
Image Resizer
Change an image to exact dimensions without uploading it.
- ✓Set an exact width and height.
- ✓Lock the original aspect ratio.
- ✓Export as JPG, PNG, or WebP.
Local image tool
Choose an image and create your result.
Original image
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Your image is ready
- Original file
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- New file
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- Size change
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- Dimensions
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Created locally in this browser. This image was not uploaded.
Your images never leave your device.
Processing happens locally. Nothing is uploaded or saved.
01
How this check works
- 1
Choose an image from your device.
- 2
Adjust the available output settings.
- 3
Create and download the result in your browser.
02
What this result tells you
Resize JPG, PNG, and WebP images to exact pixel dimensions in your browser. Keep the aspect ratio and download the result privately.
- Set an exact width and height.
- Lock the original aspect ratio.
- Export as JPG, PNG, or WebP.
Practical examples and limitations
When to use this tool
Use this tool when a website or document specifies pixel dimensions, or when a full camera image is unnecessarily large for its destination. Work from an original backup so repeated resizing does not become your only remaining version. Pixel dimensions control the amount of image data; a DPI label alone does not set the displayed size on a website.
Worked example
For a 4000 × 3000 image, enter a width of 1200 with the aspect-ratio lock enabled. The matching height is 900. If the destination instead requires 1200 × 630, unlocking the ratio can distort the photo: crop to the desired ratio in an editor first. Compare the saved copy with the original to check dimensions and file size.
What to check before using the result
Enlarging 800 × 600 to 1600 × 1200 gives four times as many pixels, but the extra pixels are interpolated rather than newly captured detail. Inspect faces, text and edges at the intended display size. Canvas exports can change color profiles or metadata. Keep the original and check the output before publishing.
FAQ
Frequently asked questions
Does resizing reduce image quality?+
Making an image smaller usually preserves useful detail, while enlarging requires the browser to estimate new pixels and may look softer. JPEG and WebP quality settings also affect the result.
Your images never leave your device.+
ImageMetaCheck reads your file with browser APIs on your device. The image is never sent to our server, stored in a database, or used for training.