IMAGE RESIZER
Resize Image
Resize images to exact dimensions or percentages
Drag & drop your images here
or click to browse files
Supports JPG, PNG, WebP, GIF, BMP, TIFF and AVIF up to 50MB each (30 files max)
Custom Dimensions
Keep Aspect Ratio
High Quality Output
Multiple Formats
Batch Resize
How to Resize an Image?
- 1
Upload images
Drag & drop one or more JPG, PNG, WebP, GIF, BMP or TIFF files.
- 2
Choose resize mode
Scale by percentage, set exact dimensions, or place images on a canvas.
- 3
Preview result
Compare original and resized sides with a real server-generated preview.
- 4
Download
Save individual images or Download All as a ZIP for batch jobs.
Real resizing — real dimensions and file sizes
OneFileKit resizes images on the server with Sharp/libvips. Preview and download sizes come from actual encoded output, not hardcoded sample numbers.
Keep aspect ratio when you want proportional scaling, or unlock width and height for intentional distortion. Canvas mode places the image on a target size with contain, cover or fill.
Transparent images keep alpha in PNG/WebP/GIF. JPG flattens onto a background and we warn you before converting.
Frequently asked questions
- What resize modes are available?
- By percentage (scale relative to the original), by dimensions (exact width/height with optional aspect lock), and by canvas (place the image on a target size with contain, cover or fill).
- How does Keep aspect ratio work?
- When enabled, changing width recalculates height from the original proportions (and vice versa). Disable it only when you intentionally want to stretch the image.
- Will my file always get smaller?
- Not necessarily. Upscaling or switching formats can increase size. We show the real output size after processing.
- Can I resize multiple images at once?
- Yes. Upload a batch, resize them together, then download individually or as a ZIP of successful outputs.