Image Resizer
Change an image's dimensions exactly. Set a width and height in pixels, scale by a percentage, or work in centimetres, millimetres or inches at a chosen DPI. Keep the aspect ratio locked, pick JPG / PNG / WebP output, and optionally squeeze the result under a file-size limit. The picture is processed in your browser and never uploaded.
Drop an image here, or click to choosePNG, JPG or WebP — nothing is uploaded
How to use it
- Drop in a photo (PNG, JPG or WebP).
- Choose Pixels, Percent or cm / mm / inch and enter the size you need.
- Pick an output format; optionally set a maximum file size in KB.
- Click Resize image, check the preview, then download.
FAQ
- Is my photo uploaded?
- No. It is decoded and re-drawn entirely in your browser — nothing is sent to a server.
- How does the cm / inch mode know the pixel size?
- It uses the DPI you set (300 by default): pixels = size ÷ 2.54 × DPI for centimetres. Higher DPI means more pixels for the same physical size.
Related tools
- Resize Image in CM, MM or InchesSet an image's real-world size in centimetres, millimetres or inches at a chosen DPI.
- Compress Image to a Target KBShrink a JPG / PNG / WebP to a specific size — 20 KB, 50 KB, 100 KB, 200 KB.
- Increase Image Size in KBPad a too-small image up to a minimum file size some portals require.
- Image CompressorReduce JPG, PNG and WebP file size with a quality slider and live preview.
- Crop ImageDrag to crop a photo, with 1:1, 4:3, 3:4, 3.5:4.5 and 16:9 aspect presets.
Free to use, no sign-up. Calculations run in your browser — nothing you type is sent to a server. These tools are for general information only, not professional advice. See the full tool list.