How Does HiCompress Compress Images and How Much Can It Reduce File Size?

HiCompress compresses images in the browser by re-encoding them at a lower quality or with more efficient settings, and it supports batch processing across JPG, PNG, WEBP, and GIF. According to the site's own claims, you can expect file size reductions of roughly 80% for general image compression and up to 90% for its image compressor tool. The exact result depends on the format, the original quality, and whether you choose lossy or lossless compression. If you need a specific target size — like 50KB or 100KB — HiCompress has dedicated tools for that.

What formats can HiCompress handle?

The site lists compression support for the following formats:

It also supports BMP and animated GIF in its general image compressor, and the broader toolkit covers conversions from PNG, WEBP, BMP, TIFF, and RAW formats (CR2, CR3, NEF, ARW, ORF, PEF, RAF) to JPG.

How the compression works

HiCompress runs as an online web app, so you upload files, the tool processes them, and you download the results. There is no installation or registration mentioned for the core tools.

The two compression modes behave differently:

• Lossy compression reduces file size by discarding some image data. This is the mode that produces the largest reductions — the site claims up to 80% for general compression and up to 90% for the dedicated image compressor. The trade-off is a potential drop in visual quality, though at moderate settings this is often hard to notice.
• Lossless compression reduces file size without discarding data, by storing the same image more efficiently. Reductions are smaller but the image stays pixel-identical. This is available for PNG and WEBP.

For JPG, compression is inherently lossy. For PNG and WEBP, you can pick either approach depending on whether quality or size matters more.

How much can it actually reduce?

The site's stated figures are:

• Up to 80% reduction for general image compression
• Up to 90% for the image compressor tool
• 30–50% for GIF optimization

These are best-case numbers. In practice, the reduction depends on:

• Original quality: A high-quality JPG straight from a camera has more redundant data to strip than an already-compressed image.
• Format: PNG files with flat colors compress differently than photographic JPGs.
• Chosen settings: Lossy at aggressive settings shrinks more than lossless.
• Image content: Detailed photos and simple graphics respond differently to the same settings.

A reasonable expectation is that a typical photo will shrink substantially with lossy compression, while a PNG graphic may see a more modest reduction unless you accept some quality loss.

Compressing to a target size

If you need a file under a specific limit — for example, for an upload form or an email attachment — HiCompress offers dedicated tools:

• Compress image to 50KB: batch-compresses JPG, PNG, and WEBP to 50KB
• Compress image to 100KB: same, targeting 100KB

These are useful when a platform enforces a hard size cap and you don't want to guess at quality settings.

Other tools in the same workflow

Compression often pairs with other steps, and HiCompress bundles them:

• Resize and crop to change dimensions before or after compressing
• DPI conversion to change the DPI of multiple images
• Format conversion (PNG to JPG, WEBP to JPG, HEIC to JPG, RAW to JPG) when the target platform requires a specific format
• PDF tools including JPG to PDF, PDF to JPG, merge, split, and page deletion
• AI background removal for batch background removal

What to check before relying on it

• Verify the output quality after lossy compression, especially for images used in print or large displays.
• Confirm the target size is actually met — target-size tools aim for a limit, but always check the downloaded file.
• Check format support for your specific file; the site lists common formats but unusual ones may not be covered.
• Note that pricing details aren't specified in the available information, so confirm any limits on the site itself if you plan heavy or commercial use.