weconvertit

Image

Compress PNG

Free, private, and instant — your files never leave your device.

Loading tool…

PNG uses lossless compression — the DEFLATE algorithm stores every pixel exactly, with no quality loss whatsoever. That precision makes it the right choice for screenshots, logos, and diagrams, but it means file sizes for photographic content can be enormous. Compressing a PNG has two distinct paths: re-encoding it as a smaller lossless PNG (the canvas pipeline can trim 5–20% off a bloated file from an older encoder), or converting it to a lossy format like WebP or JPEG where the savings are far more dramatic — typically 25–60% smaller for photographs at quality 85. The tool lets you choose: keep the PNG format for lossless output, or switch to WebP for the smallest web-ready file that still preserves transparency.

When you’d want to compress

  • Reducing large photographic PNG files before uploading to a CMS or sharing by email
  • Optimising web assets where PNG file sizes are slowing down page loads
  • Trimming PNG screenshots or exports from design tools like Figma or Sketch
  • Batch-reducing a folder of PNGs before publishing to a website or app

What to watch for

Switching to WebP or JPEG applies lossy compression — the output is smaller but no longer pixel-perfect. Keep the original PNG if you may need to edit it again.
JPEG does not support transparency. If your PNG has a transparent background and you choose JPEG output, those pixels will become white.

How to Use

  1. 1

    Drop your PNG files onto the upload area or click to browse.

  2. 2

    Choose the output format: "Keep format" for lossless PNG output, WebP for the smallest file while keeping transparency, or JPEG for maximum size reduction (transparency becomes white).

  3. 3

    Set the quality slider if you chose WebP or JPEG. Quality 82–88 is a good starting point.

  4. 4

    Download each compressed file, or use "Download All" to save everything at once.

Related Conversions

PNG to WebP PNG to AVIF PNG to JPEG

Compress Other Formats

Compress JPEG Compress WebP Compress AVIF Compress GIF Compress BMP Compress HEIC

Related Guide

PNG vs JPG vs WebP vs AVIF

Frequently Asked Questions

How much smaller can a PNG get?

For photographs, switching to WebP typically achieves 25–60% smaller files at quality 85+, with imperceptible quality loss. For screenshots and flat-colour graphics, WebP savings are smaller but still meaningful. Keeping lossless PNG output produces modest savings of 5–20% by running a more efficient DEFLATE pass — useful when pixel-perfect output is required.

Will compressing a PNG lose quality?

Only if you switch to WebP or JPEG. "Keep format" (PNG output) is always lossless — not a single pixel changes. WebP and JPEG apply lossy compression that discards fine spatial detail; at quality 85+, the difference is imperceptible in photographs, though text-heavy or flat-colour graphics show artefacts at low settings.

Should I compress to WebP or keep it as PNG?

For web delivery, WebP is almost always the right choice — smaller files, full transparency support, and all major browsers since 2020. Keep PNG if you need maximum compatibility (email, print, desktop apps), plan to edit the image further, or the file is a diagram or screenshot where pixel precision matters.

See all compress tools

Browse every format — compression and conversion, free and in-browser.

All Conversions