PNG Compress

Batch-compress PNG with smart quantization or strict lossless. Local in-browser processing—nothing uploaded.

Select images (multiple)

Select or drop imageBatch processing is supported. Compression components warm up after selection, and image dimensions remain unchanged.

No images selected yet. After you choose or drop files, they appear here.

Compression qualityPNG compression mode

Smart mode merges similar colors and can greatly reduce PNG size with almost no visible change, but it is not pixel-perfect lossless.

Image conversion and compression

Compress, resize, crop, OCR, and convert JPG, PNG, WebP, HEIC, and other image formats.

How to use & FAQ

Why Tools Ku

100% free, no signup
Smart quantization for smaller files
Strict lossless option
Local processing—images never leave your device

UI assets and transparent icons often ship as oversized PNGs. This tool batch-compresses PNG in your browser: smart mode reduces similar colors for big size wins; strict lossless only re-encodes, keeping every pixel.

Supports batch jobs and ZIP download. Everything runs locally—ideal for private screenshots and design files.

Steps

1Drop or select one or more images
2Choose smart compress or strict lossless
3Start compression and wait for local processing
4Download individually or as a ZIP

FAQ

Are my images uploaded?▾

No. Compression runs entirely in your browser.

Smart vs strict lossless?▾

Smart mode reduces similar colors for smaller files (not pixel-perfect). Strict lossless keeps every pixel and only optimizes PNG encoding.

Is transparency preserved?▾

Yes. Output stays PNG with alpha intact.

Batch support?▾

Yes. Process many files and download a ZIP.

Will quality drop?▾

Strict lossless: no. Smart mode usually looks near-identical; rare cases may show slight color shifts.

Need JPG/WebP instead?▾

Use Image Compress or JPG Compress for other output formats.