Image resize
Resize images by width, height, or percent in your browser, several at a time, without uploading originals.
Files never leave this device.
How to use it
- 1
Add your images
Choose files or drop them into the work area. HEIC, JPG, PNG, WebP, and AVIF are accepted, and you can add many pictures at once.
- 2
Choose the new size
Resize by pixels with a width, a height, or both, or switch to percent to scale every picture by the same amount. Keep the aspect ratio to avoid stretched results.
- 3
Pick the output format
Keep each picture in its own format, or save everything as JPG, PNG, WebP, or AVIF. Set the quality for the lossy formats before you start.
- 4
Resize and download
Press Resize, check the new dimensions shown for each file, then save them one by one or as a single ZIP package.
Common use cases
Security and privacy
Resizing happens on your device
Frisbly resizes pictures with your browser canvas. No image bytes are sent to a server, there is no upload route for your files, and no account is needed. When you add a HEIC photo, the decoder is loaded only at that moment and also runs locally. Closing the tab removes the selected files and results.
Supported inputs and outputs
Supported inputs and outputs
- Inputs: HEIC, JPG, PNG, WebP, and AVIF, up to 30 MB per file.
- Resize by width, height, both sides, or percent.
- Outputs: same format as the source, or JPG, PNG, WebP, AVIF.
- Up to 30 files per batch with a single ZIP download.
FAQ
Are my pictures uploaded to resize them?
No. The pictures are resized inside your browser and are never sent to a Frisbly server.
How does keeping the aspect ratio work?
Enter only a width or only a height. The other side is calculated from each picture's own proportions, so every result keeps its shape.
Can I make a picture larger?
Yes. You can enlarge pictures up to 16384 pixels per side and 40 megapixels. Enlarging does not add detail, so results may look soft.
Why does the result differ by one pixel?
Calculated sizes are rounded to whole pixels. When the ratio gives a fraction, the nearest whole number is used, so a side can differ by one pixel.
Does resizing keep the photo metadata?
No. The resized copy is drawn again from the pixels, so camera details and location tags in the original are not carried over.