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Browser-local workspace

Compress PNG files without uploading

Re-encode PNG images locally with the browser’s lossless encoder and keep transparent pixels intact.

  • No upload
  • No sign-up
  • PNG
PixelShrink workspace
Local only

Nothing selected yet

Quality applies to JPG and WebP. PNG output remains lossless.

    Per image

    25 MB

    Images per batch

    20

    Batch limit

    150 MB

    A practical guide

    Re-encode PNG pixels without pretending every file will shrink.

    PNG is a lossless format commonly used for screenshots, interface graphics, diagrams, logos, and images that need transparent pixels. PixelShrink asks the browser to create a fresh PNG from the decoded image. The pixels and alpha can remain intact, but the browser controls its encoder and an already optimized source may not become smaller.

    Unlike JPG or lossy WebP, the PNG quality slider does not provide a meaningful size-versus-detail tradeoff here, so it is disabled. Complex photographs often produce large PNG files because lossless encoding must preserve every pixel exactly. If lossless output is not required, compare a WebP or JPG conversion instead; choose JPG only when transparency is unnecessary.

    Format notes

    Know what changes—and what does not.

    Transparency stays available

    PNG supports partial alpha, which is useful for logos, overlays, shadows, and cut-out graphics on changing backgrounds.

    Lossless does not mean small

    Screenshots and flat-color graphics can compress well; detailed photographs and noisy textures often remain much heavier than lossy alternatives.

    Palette optimization is outside this encoder

    The browser canvas produces PNG output but does not expose advanced palette or quantization controls, so specialist PNG tools may beat it on some graphics.

    Good fits

    Useful choices for real files.

    A transparent store logo

    Re-encode the logo as PNG when its edges must remain clean on both light and dark page backgrounds.

    A software screenshot

    Keep text and interface edges lossless, then compare the output bytes before replacing an already optimized original.

    Privacy by design

    Your image does not become our file.

    PNG decoding, transparency handling, re-encoding, and previews remain inside the browser. The selected file is not uploaded to the Laravel application. Temporary preview and result URLs are released when you reset or leave the page.

    Frequently asked questions

    Answers before you start.

    Is PNG compression guaranteed to reduce the file?

    No. Browser re-encoding may produce a smaller, equal, or larger PNG depending on how the source was created and optimized.

    Why is the quality control disabled?

    This workflow uses the browser’s lossless PNG encoder. It does not expose a lossy PNG quality setting.

    Will transparent pixels remain transparent?

    Yes for ordinary still PNG files. The output format supports alpha, although animation is not preserved by this canvas-based workflow.

    Related tools

    Keep the next image task local.