Use Pixels for Exact Dimensions
Choose Pixels when a website, form, layout, or content system gives you a specific width and height. Enter either dimension with the ratio locked to calculate the other one automatically.
Free Image Resizer Online
Resize JPG, PNG, and WebP images by exact pixels or percentage. Keep the aspect ratio, choose the output format, compare dimensions and file size, and download the locally processed result without logging in.
- Free to use
- No login
- Local processing
- JPG, PNG, and WebP
Resize workspace
One image at a time · processed locally
Source image
Resize settings
Quick resize
TargetChoose image
Your image stays in this browser
Need a smaller file? Use Image Compressor.Preview
How to Resize an Image Online
A short, predictable path from the original file to a checked and downloadable result.
- Step 1
Choose an Image
Select a JPG, PNG, or WebP image and confirm its original dimensions and file size.
- Step 2
Set the Size
Choose Pixels or Percentage, set the target size, keep or unlock the aspect ratio, and select an output format.
- Step 3
Resize and Download
Generate the result, compare its dimensions, format, and file size with the original, then download it.
Common Image Resizing Tasks
Start with the final dimensions or scale you need, then choose the format that fits the destination.
- Resize a product image to 1200 x 1200 pixels
- Scale a photo to 50% of its original dimensions
- Create an 800-pixel-wide blog image
- Export a transparent graphic as PNG
- Convert a resized photo to JPG or WebP
- Reduce dimensions before using the Image Compressor
Choose the Right Resize Settings
Use the resize mode, ratio control, and output format that match the requirement you already have.
Use Percentage for Proportional Scaling
Choose Percentage when you want a relative change such as half size. Enter any value from 1% to 400%, or use the 25%, 50%, 75%, and 100% shortcuts.
Keep the Aspect Ratio Locked
The ratio lock prevents accidental stretching by changing width and height together. Unlock it only when independent dimensions are required and distortion is acceptable.
Pick PNG, JPG, or WebP
Use PNG when transparency matters. JPG fills transparent pixels with white. JPG and WebP expose a quality control that trades some detail for a potentially smaller file.
Understand Your Resized Result
Check what changed before downloading, and use a different image tool when the job is cropping, compression, or detail enhancement.
Compare Dimensions, Format, and File Size
The result summary shows original and output dimensions, file size, and format. File size depends on image content, pixel count, format, and quality, so it may not change in direct proportion to width.
Downscaling and Upscaling Behave Differently
Downscaling removes pixels from the source. Upscaling interpolates existing pixels and can look softer because standard resizing cannot reconstruct detail that was not captured.
Resize Is Not Crop or Compression
Resize changes the full image's pixel grid. Crop removes edge areas. Compression mainly changes encoding and file size. Use Image Compressor when a file-size limit matters more than exact dimensions.
Privacy, Formats, and Limits
The tool keeps processing local and states its format and browser boundaries so you can decide whether it fits the file you have.
Your Image Stays in This Browser
The selected file is decoded with browser APIs, drawn to a local Canvas, and exported to a temporary browser URL. No image file is sent to a processing server.
Supported Input and Output Formats
JPG, PNG, and WebP are supported for both input and output. GIF animation, HEIC, AVIF, BMP, SVG, RAW camera files, and layered project files are not supported here.
Browser and Quality Limits
This page processes one image at a time and limits each output dimension to 12,000 pixels. Available device memory limits very large files, and enlargement cannot create new image detail.
Image Resizer FAQ
Direct answers about dimensions, quality, formats, and browser-side privacy.
How do I resize an image to exact pixel dimensions?
Choose Pixels, enter the target width and height, and leave the aspect-ratio lock on if you want the other dimension to update proportionally. Select Resize image, review the output dimensions, and download the result.
Can I resize an image by percentage?
Yes. Choose Percentage and enter a scale from 1% to 400%, or use the 25%, 50%, 75%, and 100% shortcuts. The output width and height are calculated from the original image.
Can I resize an image without losing quality?
Reducing dimensions usually preserves the visible result well, but every resampling operation changes pixel data. Enlarging can look softer because ordinary resizing cannot recreate detail that is missing from the source image.
Does this image resizer upload my image?
No. The selected image is decoded, resized, previewed, and exported in your browser. The tool does not send the image file to a processing server.
What is the difference between resizing and cropping?
Resizing changes the pixel dimensions of the full image. Cropping removes part of the image. This tool resizes the full image and does not provide a crop selection.
Which image formats are supported?
You can open and export JPG, PNG, and WebP images. PNG can preserve transparency. JPG does not support transparency, so transparent pixels are filled with white when JPG is selected.
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