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Compress PNG images

Shrink PNG files with the OxiPNG optimizer — losslessly, or even smaller by converting to WebP. All in your browser.

  • No uploads — 100% on-device
  • Fast in-browser processing · WASM codecs
  • Unlimited files · up to 256MB each

Drop images here

or Browse files

Tip: paste images directly with Ctrl+V

HEIC · PNG · JPEG · WebP · AVIF · GIF · SVG

PNGs are often bigger than they need to be. Lumagely runs OxiPNG to strip waste and re-pack the file with no quality loss, and if you want dramatic savings you can convert to WebP in one click. Nothing is uploaded.

How to compress PNG images

  1. 1Drop your PNG files in.
  2. 2Keep PNG for lossless optimization, or choose WebP for much smaller files.
  3. 3Download each result, or the batch as a ZIP.

Good to know

  • OxiPNG compression is lossless — every pixel is preserved.
  • Converting to WebP or AVIF shrinks PNGs far more, with optional transparency.

Compress PNG — questions

Does compressing PNG lose quality?

No. OxiPNG is lossless, so the image is identical — just stored more efficiently.

Why is my PNG still large?

PNG is inefficient for photos. For big savings, convert to WebP or AVIF, which keep transparency too.

Can I compress PNGs in bulk?

Yes — add a whole batch and download them all as a ZIP.

Everything you can do

A complete image toolkit — compress, convert, resize, crop, rotate and watermark — all running privately in your browser.

  • Smart compression

    Shrink PNG, JPEG, WebP and AVIF with WebAssembly codecs — Smart Auto, lossy, near-lossless or fully lossless.

  • Target file size

    Set a limit in KB and Lumagely finds the best quality that fits — ideal for upload caps and email attachments.

  • Convert & HEIC to JPG

    Convert between PNG, JPEG, WebP and AVIF, turn iPhone HEIC photos into JPG, and modernize old GIFs.

  • Resize, crop & rotate

    Resize by pixels or percentage, crop to any aspect ratio, and rotate or flip — across the whole batch.

  • Batch watermark

    Stamp a text or logo watermark onto every image, with full control over position, size, opacity and margin.

  • Private & offline

    Everything runs on your device in Web Workers — no uploads, no sign-up, and it keeps working offline.

Supported formats

Compress, convert and optimize the formats the modern web runs on.

  • HEIC

    Convert iPhone HEIC photos to JPG, PNG, WebP or AVIF.

  • PNG

    Lossless compression with OxiPNG.

  • JPEG

    High-quality photos with MozJPEG.

  • WebP

    Smaller photos & graphics, lossy or lossless.

  • AVIF

    Next-gen format with the best compression for photos.

  • SVG

    Minify vectors, or trace raster images into SVG.

  • GIF

    Convert GIFs to modern, smaller formats.

Why Lumagely?

100% private

Your images are processed on your device and never uploaded to any server.

Fast & modern

WebAssembly codecs (MozJPEG, OxiPNG, libwebp, libavif) run at near-native speed in your browser.

Free & unlimited

No sign-up, no forced watermarks, no limits — optimize as many images as you like.

Browser-based vs. upload-based

Typical upload tools

  • Images are uploaded to a server
  • Sign-up or usage limits are common
  • Often split across separate tools
  • Privacy depends on the provider

Lumagely

  • Images stay on your device
  • No sign-up — unlimited files
  • Compress, convert, resize and social export in one place
  • Private by design — nothing leaves your browser

More image tools

One-tap tools for the most common image jobs — all free, all in your browser.