Compress PNG Online — Free

Shrink PNG files while keeping transparency. Lossless and smart-lossy modes. Up to 1GB free.

Why PNG Compression Matters

PNG is the format of choice for screenshots, logos, UI assets, and any image that needs a transparent background. The downside is file size — uncompressed PNGs can balloon into megabytes. FileMate applies advanced palette optimization and zlib re-encoding to shrink PNGs by 50–70% with no visible quality loss.

Lossless vs Smart-Lossy PNG

	Lossless (Quality)	Smart-Lossy (Balanced)
File size reduction	10–40%	50–70%
Visual quality	Identical	Near-identical
Transparency	Preserved	Preserved
Best for	Print, master copies	Web, app assets, email

How to Compress a PNG

Upload — drag-drop one or many PNGs. Guest limit 500MB each, registered users 1GB.
Pick a mode — Quality for lossless, Balanced for size reduction with no visible difference.
Download — get a single ZIP of all compressed PNGs.

PNG Compression Best Practices

Use PNG only when you need transparency or lossless quality. For photos, JPG is 5–10× smaller.
Strip metadata (EXIF, color profiles) before publishing — it often adds 5–15% to file size.
For icons and UI elements, convert to WebP or AVIF for even smaller sizes.

Frequently Asked Questions

Does PNG compression lose transparency?

No. FileMate preserves the alpha channel exactly. Transparent pixels stay transparent.

Can I compress PNG to a specific size like 100KB?

For target sizes, try compressing JPG to 100KB instead — PNG isn't ideal for hard size targets.

Is PNG compression lossless?

Quality mode is fully lossless — bit-for-bit identical output. Balanced mode is smart-lossy and visually lossless.

How many PNGs can I compress at once?

Upload as many as you want. FileMate processes them in parallel.

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