Image Compression Formats

Supported Formats

Zipic currently supports JPEG, PNG (including APNG animated images), WebP, HEIC, AVIF, TIFF, ICNS, SVG, PDF, and JPEG-XL (JXL). Future updates will include more formats.

Note

SVG compression, APNG compression, and PDF compression are available for Pro users. PDF files open with system preview when clicking thumbnails for better viewing.

Conversion Formats

As an image compression tool, Zipic focuses on converting images to smaller, more efficient formats rather than supporting every format. Currently, it can convert images to JPEG, WebP, PNG, AVIF, HEIC, and JPEG-XL (JXL).

You can select the conversion format in the Compression Options window or in the Settings.

Note

1. WebP, AVIF, HEIC, and JPEG-XL (JXL) are recommended for efficient compression.
2. Choose WebP, AVIF, PNG, HEIC, or JPEG-XL (JXL) if transparency is needed.
3. If transparency is not needed, any format can be selected.
4. Converting WebP or HEIC to JPEG may lead to suboptimal results; use caution.
5. Converting to PNG may increase file size.

Example Workflow

Once you’ve selected the target format, you can begin compression. Format conversion is part of the compression process, allowing you to batch process multiple images.

The compression log will display the target format, making it easy to identify conversions.

SVG Compression Pro

Zipic supports optimizing SVG (Scalable Vector Graphics) files with 6 compression levels, ranging from conservative to maximum optimization. SVG compression removes unnecessary metadata, comments, and redundant attributes to reduce file size while preserving the visual output.

The comparison preview for SVG files renders them as live vectors, allowing you to accurately inspect the visual fidelity of the compressed SVG at any zoom level.

SVG Compression Demo

Tip

SVG compression is ideal for web developers and designers who work with vector graphics. Even small SVG files can benefit from optimization, especially when used extensively across a website.

APNG Compression Pro

Zipic supports compressing APNG (Animated PNG) files. APNG is an extension of the PNG format that supports animation, offering better quality than GIF with full alpha transparency. Zipic can reduce APNG file sizes while preserving animation frames and visual quality.

Enhanced PDF Compression Pro

Zipic 1.9.0 introduces a new Ghostscript-based PDF compression engine that delivers dramatically better results through font and content stream optimization. Encrypted PDFs are automatically detected and a friendly prompt is displayed.