ImageToolMage

Dimensions

Image Resizer

Change width and height by exact pixels or percent. The file stays on this device.

Processing happens in your browser and ImageToolMage does not upload the image to our server. Browser extensions, the clipboard, and screen capture can still expose a file on your device.

Choose one file with the file picker, or drop it on the box. This is not drag-only.

Drop one image here. The file picker above is the keyboard-accessible path.

Choose an image to resize.

How it works

The browser decodes the file, draws it onto a canvas at the target size, and exports a new Blob. JPEG and WebP use a quality slider because re-encoding can change appearance.

Input and output

Input is one image file. Output is a new file at the requested pixel size, in the same raster format family. SVG, RAW, HEIC, and PDF are out of scope.

Examples

Exact pixels

Set 1200 × 630 for a social share card, or 1080 on the long edge for a square post.

Percentage

Use 50% to halve both sides while keeping the same proportions.

How to use this tool

  1. Choose a JPG, PNG, or WebP, or drop it onto the page.
  2. Enter a width, height, or percentage. Lock the ratio unless you want stretch.
  3. Download the resized file when the preview looks right.

Limitations

  • Very large images can fail in the browser. A pixel and memory guard rejects unsafe sizes.
  • Re-encoding JPEG or WebP can change quality even when dimensions stay similar.
  • Canvas export may drop or rewrite color profiles and metadata.

Questions

Does resizing keep the original quality?

No. Scaling redraws pixels. Downscaling usually looks acceptable. Upscaling cannot invent missing detail and often looks softer.

Is the image uploaded?

No. Decoding and redrawing run in your browser. ImageToolMage does not send the file to our server.

Can I convert JPG to WebP here?

No. This page keeps the same format family you opened. Changing file format is a different job.

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