Two clear resize modes
Maximum width and height preserve the full image inside a box; exact mode is explicit when cropping may be required.
Resize Images Online
Resize JPEG, PNG, WebP and static AVIF images locally by maximum or exact dimensions without unintended upscaling.
Local processingBatch readyIndividual or ZIP download
Settings
Upload and compress images
Drop or paste images here
JPEG, PNG, WebP or static AVIF. Add one file or a whole batch.
- JPEG
- PNG
- WebP
- AVIF
Local files never leave your device.
Resize by intent, not by a single ambiguous width box.
The Resize control is placed first on this route. Choose maximum bounds for a non-cropping fit, or exact dimensions when every output needs the same canvas.
- Inputs
- JPEG, PNG, WebP, static AVIF
- Resize modes
- Fit within bounds or exact dimensions
- Upscaling
- Prevented by the processing engine
Built on the production path
The worker protocol owns resize calculations and encoding, keeping React clear of pixel-processing internals and the page responsive.
How it works
Image pixels, dimensions, filenames and metadata remain in your browser. Local files are not posted to a resizing service.
Choose images
Add one supported static image or a batch. The browser reads verified dimensions and prepares local previews.
Set the geometry
Open the first settings control, enable resizing and choose fit or exact dimensions. Smaller sources are never enlarged.
Verify the outputs
Workers resize and encode the queue locally. Review dimensions and bytes before downloading individual files or a ZIP.
Useful for
- Bound oversized photos before publishing them in a CMS.
- Create consistently sized thumbnails with an exact centered crop.
- Resize a mixed-format batch while keeping each file's original format.
Questions about resize images online
What is the difference between fit and exact resize?
Fit mode keeps the image inside maximum width and height bounds while preserving its proportions. Exact mode creates the requested canvas dimensions and can use a centered proportional crop when aspect ratio is maintained.
Will a small image be enlarged?
No. The resize plan prevents upscaling, so an image that is already smaller than the requested bounds keeps its original dimensions.
Can I resize and convert at the same time?
Yes. Keep original format to resize only, or choose JPEG, PNG, WebP or static AVIF output and adjust compression settings in the same local workflow.