TovolBox
Live tool

Image Resize Calculator

Calculate resized image dimensions while preserving aspect ratio. Use this browser-based tool for everyday work. It is designed for speed, privacy, and clear results.

Local image resizer

Your image is processed locally and is not uploaded.

Choose an image. Processing stays in your browser.

Use cases

  • Daily developer workflows
  • Content and SEO checks
  • Private browser-side processing

Private image resizing

Resize images locally before uploading them to a CMS, marketplace, support ticket, or social profile. The file is decoded and drawn in your browser.

  • No image upload is required
  • Choose PNG, JPEG, or WebP output
  • Use fit modes for thumbnails and fixed-size slots

Quality and dimension tips

Start with the smallest dimensions that still look sharp where the image will appear. For photos, JPEG or WebP quality around 80 to 90 percent is usually a good first pass.

  • Keep aspect ratio for natural photos
  • Use cover for fixed cards and avatars
  • Check output size before downloading

How to use

  1. Paste or enter your input.
  2. Adjust options when available.
  3. Review, copy, or download the result.

FAQ

Is this tool free?

Use this browser-based tool for everyday work. It is designed for speed, privacy, and clear results.

Does my input leave the browser?

Use this browser-based tool for everyday work. It is designed for speed, privacy, and clear results.

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