Small.im Image Compression FAQ

General Questions

What is Small.im?

Small.im is an open-source batch image compression tool that supports multiple image formats. It is a fork of PicSmaller (https://github.com/joye61/pic-smaller), available at https://github.com/airyland/pic-smaller, and is distributed under the MIT license.

What image formats does Small.im support?

Small.im supports various formats, including JPEG, WEBP, PNG, GIF, and AVIF.

Is it safe to use Small.im with my images?

Yes, it's completely safe. All image compression and conversion processes are performed locally in your browser. Your images are never uploaded to any server, ensuring your data privacy and security.

Usage

How do I upload images to Small.im?

You can select files by clicking on the upload area or by dragging and dropping files and folders onto it.

Can I add multiple images at once?

Yes, you can batch append images or add entire folders at once.

How can I compare the original and compressed images?

Use the preview feature, which allows you to drag a dividing line to compare the original image (left side) with the compressed image (right side).

Compression Options

Can I resize images during compression?

Yes, you can resize images using various modes:

  • Set width (height scales automatically)
  • Set height (width scales automatically)
  • Set short side (long side scales automatically)
  • Set long side (short side scales automatically)

What parameters can I adjust for different image formats?

You can adjust:

  • JPEG/WEBP: Output image quality (0-1)
  • PNG: Number of output colors (2-256) and dithering coefficient (0-1)
  • GIF: Dithering option
  • AVIF: Output image quality (1-100) and compression speed (1-10)

Managing Compressed Images

How can I download my compressed images?

You can download individual images or save all compressed images at once.

Can I remove images from the list?

Yes, you can remove individual images or clear all images from the list.

Troubleshooting

What should I do if I encounter a 404 error?

If you see a 404 error, it means the page you're trying to access doesn't exist. Use the "Back to home" option to return to the main page.

How can I reset the compression options to default?

Use the "Reset options" button to restore all compression settings to their default values.