MMaster Tools
ImageRuns on your device

Batch Resize

Apply the same resize settings to many images at once and download them as a zip file.

How it works

  1. 1

    Drop all the images you want to resize — you can select multiple files at once. All files receive the same resize settings.

  2. 2

    Enter a target width, height, or percentage. Enable the aspect ratio lock to keep each image's proportions. The fit mode applies when you set both dimensions without the lock.

  3. 3

    Click Resize all — every image is processed in your browser and packed into a single zip file for download.

Questions

How many images can I resize at once?

There is no hard limit, but processing many large images in one run will consume more memory. If your browser slows down, work through the files in smaller batches.

Are all images resized to exactly the same dimensions?

Yes, the same settings are applied to every file. If the images have different aspect ratios and you use the aspect lock or a single dimension, each image's proportions are preserved individually.

What is inside the zip file?

One resized file per source image. Each output file is named after the original with '-batch-resize' appended before the extension.

Are my images uploaded anywhere?

No. All resizing and zipping happens entirely in your browser. None of your images ever leave your device.

ICO Converter

ICO Converter

Build a multi-size .ico file from a PNG or JPG, choosing which pixel sizes to include — ideal for application icons and browser favicons.

Favicon Generator

Favicon Generator

Generate a full favicon set from one image: a three-size ICO, an Apple touch icon, PWA icons, a webmanifest, and the HTML.

SVG Converter

SVG Converter

Rasterize an SVG file to PNG, JPEG or WebP at a scale factor you choose. The result is a pixel image — not editable vector paths.

SVG to JPG

SVG to JPG

Convert an SVG to a JPEG image at the export scale you set, composited onto a solid background colour — because JPEG has no transparency.

Adjust Brightness

Adjust Brightness

Lighten or darken an image by shifting every pixel's brightness up or down with a single slider.

Adjust Contrast

Adjust Contrast

Increase or reduce the difference between light and dark areas to make an image pop or flatten it.

Adjust Saturation

Adjust Saturation

Boost or reduce the intensity of colours in an image, all the way from vivid to greyscale.

Rotate Hue

Rotate Hue

Shift every colour in an image around the hue wheel to change the overall colour cast.