Toolkeel

Resize image

Set an exact size in pixels or scale by percentage. High-quality resampling keeps edges sharp, and the image never leaves your device.

  • Free
  • No upload
  • No sign-up
  • No watermark
or drop it here JPEG, PNG, WebP, GIF, BMP or AVIF, up to 30 MB. You can also paste an image.
Stays on this device. Network requests since you started: 0 How to check this yourself
  1. Your photosRead from your device
  2. Worked on in this tabBy code running in your browser
  3. Saved to your deviceYou download the result

Never sent to a server. See how to check

How to use it

  1. Choose or drop an image.

  2. Enter a width or height in pixels (proportions stay locked unless you untick the box), or choose a percentage.

  3. Pick a format, select "Resize image", then download the result.

About this tool

Resizing changes how many pixels an image has. Making an image smaller (downscaling) is the most effective way to reduce its file size: halving the width and height leaves a quarter of the pixels. Websites rarely need images wider than 1920 pixels, and thumbnails often need only 400–800.

This tool scales in steps for large reductions and uses the browser's high-quality smoothing, which avoids the jagged or blurry results of one-step scaling. Enlarging an image cannot add real detail. It will look softer, so the tool allows enlargement only up to four times the original size.

Good to know

  • One image at a time, up to 30 MB and 50 megapixels.
  • Maximum output size is 20,000 pixels per side and four times the original.
  • Metadata such as camera details and location is not copied to the resized image.

Frequently asked questions

How do I resize without stretching the image?

Leave "Keep proportions" ticked. When you type a width, the height is calculated for you (and the other way round).

What size should images be for a website?

Full-width banners: about 1920 px wide. Images inside an article column: 1000–1400 px. Thumbnails: 400–600 px. Then compress them.

Does resizing reduce quality?

Making an image smaller keeps it sharp. Making it larger cannot add detail and will look softer. Re-encoding as JPEG or WebP is slightly lossy, so use quality 90 or above if that matters.

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Last updated 2026-10-20 by the Toolkeel team. How we build and check our tools.