Resize Image Online Free - Change Image Dimensions | MiConvert
API Tools Formats Try Pro Sign In

Resize Image Online

Change an image’s width and height in pixels or scale it by percentage — right in your browser. Keep the aspect ratio locked or set exact dimensions, with no installation and no sign up.

↔️

Drop your file here

or click to browse

Select File

Max 1 files, 50MB each

SSL Encrypted Auto-deleted No Sign Up 100% Free

Why Resize Image?

Whether you’re fitting a photo to an upload limit, preparing a thumbnail, or matching a required pixel size, resizing needs to be precise and keep the image sharp. This tool resizes on the server with a high-quality resampling filter, so downscaled images stay crisp rather than blocky.

You can resize to an exact width and height, set just one dimension and let the other follow to preserve the aspect ratio, or scale the whole image by a percentage. The output keeps the same format as the file you upload.

How to Resize Image

  1. 1

    Upload your image (JPG, PNG, WebP, GIF, BMP, or TIFF).

  2. 2

    Enter a target width and/or height in pixels, or a percentage.

  3. 3

    Choose whether to keep the aspect ratio.

  4. 4

    Download the resized image in the same format.

Key Features

  • Resize by exact pixels or by percentage
  • Locks aspect ratio automatically, or stretch to exact dimensions
  • High-quality resampling keeps downscaled images sharp
  • Works with JPG, PNG, WebP, GIF, BMP, and TIFF
  • Free, no installation, no sign up

Related Tools

Crop Image Rotate Image Flip Image Remove Text from Photo

Frequently Asked Questions

How do I resize an image without losing quality? ▼

Downscaling with a good resampling filter keeps images sharp — that’s what this tool does on the server. Note that enlarging an image beyond its original pixel size can never add real detail, so resizing works best when making an image the same size or smaller.

Can I resize an image to exact pixel dimensions? ▼

Yes. Enter the exact width and height you need. If you want to keep the original proportions, leave one field blank or keep “Keep aspect ratio” checked and the other dimension is calculated for you.

Will resizing keep the aspect ratio? ▼

It does by default — set one dimension and the other adjusts to match. Uncheck “Keep aspect ratio” to stretch the image to an exact width and height.

What image formats can I resize? ▼

JPG, JPEG, PNG, WebP, GIF, BMP, and TIFF. The resized image is returned in the same format you uploaded.

Is it free and private? ▼

Yes — resizing is free with no sign up, and your files are processed on our server and removed automatically afterward.