Compress Images Online

CompressFast is a universal image compression tool — drop in any common image format and get a smaller, web-ready file in seconds. Unlike single-format compressors that only handle PNG or JPEG, CompressFast automatically detects your image type and applies the optimal compression strategy for that format.

Here's how the all-in-one approach works:

1. Smart format detection — Each image is identified by its actual file signature, not just the extension. This means we catch mislabeled files (e.g., a PNG saved as .jpg) and apply the correct compression engine. No configuration needed on your part.

2. Format-specific compression engines — PNG gets lossless oxipng WASM optimization. JPEG gets quality-based re-encoding with chroma subsampling. WebP gets both lossy and lossless modes. GIF gets per-frame palette optimization. AVIF (Pro) gets the latest AV1-based compression. Each engine is tuned for that format's strengths.

3. Cross-format conversion built in — Compressing and converting are the same step. Want to turn your PNG into a WebP? Select WebP output and the compression engine handles both tasks simultaneously. No need for a separate converter tool.

4. Batch everything — The universal compressor shines brightest in batch mode. Mix PNGs, JPEGs, and WebPs in the same upload. Each gets its own optimal compression. Download results as a single ZIP — every file correctly compressed, every format preserved (or converted if you chose a different output format).

The universal tool is ideal when you have a folder of mixed images — product photos, screenshots, logos, social media graphics — and just want everything smaller without thinking about formats. For format-specific deep optimization, use the dedicated tool pages (compress-png, compress-jpeg, etc.).

Privacy remains absolute: whether you compress 1 image or 500, nothing ever leaves your browser. The Web Workers hum away on background threads while you continue browsing or switch tabs. No uploads, no queues, no waiting on a server.