Frostbatch
Get Frostbatch for Mac

See how it works.

Short walkthroughs captured in the Mac app. Choose a feature, follow the steps, and pause whenever you need.

Resize and crop a batch

Add your photos, choose a size and format, then export them together. Open Edit crop to adjust an individual image.

Resize and crop a batch
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Step-by-step instructions
  1. Add photos

    Start with a 2048 × 2048 photo. Add more images to the same workspace.

  2. Choose output settings

    Fit keeps the whole image. This batch uses a width of 1200 pixels and WebP output.

  3. Open the crop editor

    Drag the crop frame to choose what stays. Apply saves the crop; Cancel leaves it unchanged.

  4. Export the batch

    Three files processed together. Save the finished images as a ZIP.

One photo, several sizes

Choose a preset for a single output, or a bundle for several. The Web responsive kit creates three versions of each source image.

One photo, several sizes
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Step-by-step instructions
  1. Add a source image

    Start with your full-size photo. This example uses a 2048 × 2048 source.

  2. Browse presets

    Open the preset browser and select Web responsive kit. Review its outputs before applying it.

  3. Apply the bundle

    Apply the preset, then process the batch using the selected output rules.

  4. Save all versions

    One source becomes three files. Download them together in an archive.

Enlarge with AI

Turn on AI Upscale and choose Photo for photographs or Illustration for artwork. Processing runs on your Mac.

Enlarge with AI
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Step-by-step instructions
  1. Start with a small photo

    This example starts with a 512 × 512 portrait.

  2. Enable AI Upscale

    Select the Photo model. Leave the size on Original to keep the full 4× output.

  3. Check your settings

    AI upscaling runs before the final resize. A smaller target size will reduce the enlarged image again.

  4. Save the enlarged image

    The real export is 2048 × 2048 pixels. Detail and processing time depend on the source image and your Mac.

Let a folder handle the next batch

Choose a folder and start watching. New images are processed with your current settings while Frostbatch is running.

Let a folder handle the next batch
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Step-by-step instructions
  1. Set up your output

    Choose the size and format first. This example exports WebP at 1200 pixels wide.

  2. Choose a folder

    Open Watch folder and select the folder where new photos will arrive.

  3. Start watching

    Start watching handles new arrivals. Use Process existing to include files already in the folder.

  4. Check recent activity

    A new portrait was added and processed automatically. Stop watching whenever you want to pause the folder.