Guides for Image Tools | Sanil.app Help

Compress images by format 1 min read

What Compress does for JPG, PNG, WebP, AVIF, GIF and SVG files, and which format is likely to shrink the most.

Convert iPhone HEIC photos to JPG 1 min read

Turn HEIC and HEIF photos from an iPhone or iPad into JPG files that open on Windows, Android and the web, without uploading them.

Convert images between formats 1 min read

Which format conversions are available, how transparency and animation are handled, and when to choose JPG, PNG, WebP or AVIF.

Resize images by pixels, percent or size 1 min read

Resize a batch to exact pixels, a percentage, the longest side or a social media size, keeping the aspect ratio and never enlarging.

Crop, rotate and flip images 1 min read

Crop to a square, 16:9 or any shape, turn a picture in quarter turns and flip it. Each image in a batch keeps its own edits.

Make several sizes from one image 1 min read

List the sizes and shapes you need and get one file for each from a single photo: social posts, thumbnails and banners in one go.

Add a watermark to many photos 1 min read

Put a text or logo watermark on a whole batch of photos, with a position, size and opacity you choose, and a live preview.

Download a batch as a ZIP or to a folder 1 min read

Download results one by one, all at once as a ZIP, or save them straight into a folder on your computer.