Image & Design Tools
Image Resizer
Resize selected local images online with browser Canvas APIs.
Input / output
Images stay in your browser and are resized with Canvas.
Use presets
Original size
sample.jpg 2000 x 1000
Result size
1000 x 500
Scale
50%
File size
976.6 KB
Original
Result
Dimension preview ready
Select a file to generate a real image preview and download.
Tool usage summary
Use it for profile images, thumbnails, document attachments, and images that need exact pixel dimensions.
- Processing
- Original images are read and resized with browser Canvas APIs without uploading the files.
- Example
- Resize a 1200px-wide image to 800px while preserving aspect ratio and downloading the result.
Quick answer summary
Image Resizer changes local image width and height and downloads the resized result.
- When to use it
- Use it for profile images, thumbnails, document attachments, and images that need exact pixel dimensions.
- Processing
- Original images are read and resized with browser Canvas APIs without uploading the files.
- Example
- Resize a 1200px-wide image to 800px while preserving aspect ratio and downloading the result.
HelpOpen usage notes, examples, practical tips, and FAQ only when you need them.
What is this tool?
Image Resizer is an image resizer online workflow that uses client-side resize with browser Canvas APIs. It helps resize images online, preserve aspect ratio, preview dimensions, and download the resized file without uploading the original image.
How to use it
- Select an image
Choose a local JPG, PNG, or browser-supported image file.
- Set width or height
Enter the target dimension and keep aspect ratio on unless you need exact stretching.
- Preview the result
Check output dimensions and visible framing before downloading.
- Download locally
Save the resized image from the browser without sending the original file to a server.
Examples
Resize images online for a thumbnail
- Input
- 1200x800 photo -> 600px width
- Output
- A resized image preview and downloadable local file.
Client-side resize with aspect ratio
- Input
- 2400x1600 product photo -> 1000px width
- Output
- The height updates automatically and the result stays proportional.
Private local image resize
- Input
- Local screenshot, 50% scale
- Output
- A smaller image is created in the browser without uploading the file.
Practical tips
- Start with the platform's required width, height, and aspect ratio.
- Avoid enlarging small images unless the destination only needs rough preview quality.
- Use Image Optimizer after resizing if the resized file still needs compression.
- Files are processed in the browser and are not uploaded while resizing.
FAQ
Can I resize images online without upload?
Yes. The image is read in the browser and resized with Canvas APIs without server upload.
What does client-side resize mean?
Client-side resize means the browser performs the resize on your device instead of sending the file to an external resizing service.
Can Image Resizer keep aspect ratio?
Yes. Keep aspect ratio enabled when changing width or height to avoid stretched output.
Can Image Resizer preserve the original aspect ratio?
Yes. Resize by width or height while preserving aspect ratio for thumbnails, profile images, and attachments.
Are resized images sent to a server?
No. Original and resized image files stay in the browser and are downloaded without server upload.
What should I check for platform-specific image sizes?
Confirm the required pixel size and aspect ratio first, then preview whether the important subject still reads at small sizes.
