Resize without uploading
Image decoding, resizing and export happen locally in your browser.
Private · Browser-based · No upload
Resize & Crop Image Online
Resize by pixels or percentage, crop to common ratios or a custom area, then export locally.
JPG · PNG · WebP · AVIF · HEIC · HEIF · TIFF · SVG · JFIF
Choose imagesDrag or click to choose
—
Precise dimensions
Enter exact width and height or use a percentage while optionally locking the original ratio.
Flexible crop
Use Free, 1:1, 4:3, 3:2 or 16:9, then move or resize the crop box.
How to use Resize & Crop Image Online
- 1
Add an image
Choose, drag or paste the image you want to resize.
- 2
Resize changes dimensions, not the crop area
Set an exact width and height or scale by percentage. Keeping the aspect ratio locked avoids stretching; quick-width presets change width while preserving the selected proportions.
- 3
Crop removes pixels outside the selected area
Move and resize the crop box, use exact X/Y/Width/Height values, or choose a common aspect ratio. Cropping does not resize the selected pixels unless you switch back to Resize.
- 4
Export the resized image
Confirm the output dimensions, choose JPG, PNG, WebP or AVIF, then export the result.
About Resize Image Online
Resize changes output dimensions by pixels or percentage. Lock the aspect ratio to avoid accidental distortion.
Frequently asked questions
What is the difference between crop and resize?
Resize outputs the whole image at a new width and height without removing content. Crop removes edges or another selected area to fit a ratio or composition. Resize when you need to keep the whole image; crop before export when you need a square post, cover, or other frame.
How do I resize without stretching the image?
Keep Lock aspect ratio enabled. Changing width, height, percentage, or a quick-width preset recalculates the other dimension from the current proportion. Unlock it only when you deliberately need exact canvas dimensions and accept distortion.
Which size or aspect ratio should I choose?
A square post can be 1:1 at 1080 × 1080, a video thumbnail is commonly 16:9 at 1920 × 1080, a vertical short video is 9:16 at 1080 × 1920, and a vertical social post can use 4:5 at 1080 × 1350. Choose the ratio first, then enter the platform pixel requirement.
Will making an image larger add detail?
No. Upscaling creates more output pixels but cannot restore detail missing from the original. ViewerPix resamples for a new size, but a small source can still look soft. Use a dedicated AI upscaler if the goal is to invent or recover detail.
Should I use JPG, PNG, WebP, or AVIF?
JPG is widely compatible for photos. PNG suits text, icons, and transparency. WebP usually balances size and quality, while AVIF can compress efficiently but may not work in older software. JPG, PNG, and WebP are the safer choices when destination compatibility matters.
Will a transparent background be preserved?
PNG, WebP, and AVIF can preserve transparency. JPG replaces transparent areas with the selected background color, so it is not suitable for transparent logos, cutout products, or stickers. Choose PNG if you are unsure, accepting that it is often larger.
Does resizing always make the file smaller?
No. Smaller pixel dimensions often help, but output format, quality, transparency, and image content also affect size. To reduce size substantially, lower pixel dimensions first, then choose WebP or AVIF or reduce JPG quality moderately.
Will EXIF, location, or camera data be preserved?
Do not expect it. Resizing creates a new image, and original EXIF, GPS location, camera settings, and editing history usually do not carry to the output. Keep the original if you need that information.
Are my images uploaded to a server?
No. Supported image processing runs locally in your browser. Third-party decoder code may be loaded only when a format needs it, but your image itself stays on your device.
Private browser processing
ViewerPix processes supported images on your device. Your image files are not uploaded to a ViewerPix application server for this task.
Resize changes dimensions, not the crop area
Set an exact width and height or scale by percentage. Keeping the aspect ratio locked avoids stretching; quick-width presets change width while preserving the selected proportions.