What is Image Resizer / Compressor?
An image resizer changes the pixel dimensions of a picture, while compression reduces its file size by lowering quality just enough to save space without an obvious loss. This tool does both: you set new width and height, optionally locking the aspect ratio, and choose a quality level for JPEG and WebP output.
Smaller images load faster and take up less storage, which is essential for websites, email attachments and social uploads.
How to Use the Image Resizer / Compressor
- Upload the image you want to resize.
- Enter a new width or height (aspect ratio locks by default).
- Adjust the quality slider to balance size and clarity.
- Click Resize, then Download the optimised image.
Features of Our Image Resizer / Compressor
- Resize to any width and height
- Optional aspect-ratio locking
- Adjustable JPEG and WebP quality
- Shows original and new file sizes
- Instant preview of the result
- Processes images entirely offline
Benefits & Use Cases
Bloggers and shop owners shrink product photos for faster pages, job seekers meet upload size limits, and anyone can prepare images for email without special software. Reducing image weight is one of the biggest wins for website performance.
Because the image never leaves your browser, even private or unpublished photos stay completely secure.
The Image Resizer / Compressor is completely free, needs no sign-up or installation, and runs entirely in your browser — nothing you enter is uploaded to a server, so your data stays private. It works on desktop, tablet and mobile, in light or dark mode.
Tips & Best Practices
Keep aspect ratio locked so photos are not stretched — set one dimension and the other follows. For the web, a width of around 1200–1600px suits most layouts; going larger just wastes bytes. The quality slider affects JPEG and WebP only, so nudge it down until the preview still looks good but the file size drops noticeably.
Always keep your original in case you need a different size later. Change the file type as well with the Image Format Converter, or trim the frame first with the Image Cropper.
FAQ about Image Resizer / Compressor
Does resizing reduce quality?
Shrinking dimensions keeps quality high. The quality slider only affects JPEG and WebP compression, letting you trade a little clarity for a much smaller file.
Will it keep my image's proportions?
Yes, when Keep aspect ratio is enabled the height and width adjust together so the image is not stretched.
Are my images uploaded?
No. All resizing and compression happen in your browser, so your images never leave your device.
What formats can I download?
PNG images stay as PNG, while other formats are saved as optimised JPEG. For more control, try our Image Format Converter.