Calculator Tools

Calculate dates, ages, timestamps, units and measurements with compact utilities designed for quick repeat use.

Calculator Tools overview

Resize, crop, compress, convert, watermark and prepare favicons or social images in your browser without uploading files.

Resize, crop, compress, convert, watermark and prepare favicons or social images in your browser without uploading files. Common workflows run in the browser where the required browser APIs are available, helping you work quickly without creating an account.

Choose the right tool

Tool	Best for	Open
Image Resizer	Resize images by width and height locally in the browser.	Open tool
Image Compressor	Compress JPEG, PNG and WebP images with quality controls.	Open tool
Image Converter	Convert images between common browser-supported formats.	Open tool
Rotate Image	Rotate and flip local images in the browser, preview the result and download the adjusted file.	Open tool
Image Brightness and Contrast	Adjust brightness, contrast and grayscale filters on local images.	Open tool
Image Cropper	Crop JPEG, PNG and WebP images with precise pixel coordinates, preview the selected area and download the result locally.	Open tool
Watermark Image	Add a customizable text watermark to an image with position, size, color and opacity controls in your browser.	Open tool
Favicon Generator	Create crisp 16, 32, 48, 64, 180 or 512 pixel PNG favicon assets from a local image with automatic square cropping.	Open tool
Social Media Image Resizer	Resize and crop images for common Instagram, Facebook, YouTube, LinkedIn and X dimensions without uploading files.	Open tool

What you can do

Open a focused utility for the exact task.
Review the input and result in the same browser workflow.
Copy or download supported results after checking them.
Move to a related tool without searching again.

A practical browser-first workflow

Choose the most specific tool for the task, review its options, run it and verify the result before using the output elsewhere.

For important work, verify the selected options and inspect the output before copying, downloading or publishing it. Bookmark the exact tool page when you expect to repeat the same task.

All tools

Browse all calculator tools

Image Tools Image Resizer Resize images by width and height locally in the browser. Image Tools Image Compressor Compress JPEG, PNG and WebP images with quality controls. Image Tools Image Converter Convert images between common browser-supported formats. Image Tools Rotate Image Rotate and flip local images in the browser, preview the result and download the adjusted file. Image Tools Image Brightness and Contrast Adjust brightness, contrast and grayscale filters on local images. Image Tools Image Cropper Crop JPEG, PNG and WebP images with precise pixel coordinates, preview the selected area and download the result locally. Image Tools Watermark Image Add a customizable text watermark to an image with position, size, color and opacity controls in your browser. Image Tools Favicon Generator Create crisp 16, 32, 48, 64, 180 or 512 pixel PNG favicon assets from a local image with automatic square cropping. Image Tools Social Media Image Resizer Resize and crop images for common Instagram, Facebook, YouTube, LinkedIn and X dimensions without uploading files.

Calculator Tools FAQ

What is included in Image Tools?

Image Tools includes Image Resizer, Image Compressor, Image Converter, Rotate Image, Image Brightness and Contrast, Image Cropper, and more focused utilities.

Are Image Tools free?

Yes. UtilKit category pages link to free utilities that run in a modern browser without requiring an account.

How do I choose the right Image Tools tool?

Start with the page that names your exact task, compare its description with the other tools in the category, then use nearby toolkit tabs only when you need a related follow-up action.

Do category tools upload data?

The utilities are designed around client-side processing wherever browser APIs support it, keeping common text, image, code and calculation tasks local.

Can I bookmark individual tools?

Yes. Every important function has a direct URL for repeat use.

Are results always production ready?

No tool can understand every project context. Review important results for formatting, units, meaning and privacy before publishing or deploying them.