Does compressing a PNG remove its transparency?

No. Our PNG compressor preserves the alpha channel — your transparent areas remain fully transparent after compression.

What is the difference between lossless and lossy PNG compression?

Lossless PNG compression reduces file size without changing any pixel values. Lossy compression sacrifices some quality for a much smaller file size.

Why are PNG files so much larger than JPEGs?

PNG uses lossless compression and supports alpha transparency, which requires storing more data per pixel than JPEG's lossy encoding.

Can I compress a PNG that has text in it?

Yes. PNG is the best format for images with sharp text or flat colour areas. Quality 95 or higher will preserve text sharpness.

layers PNG · Transparency Preserved

Compress PNG Images Online
Keep Transparency, Lose the Bloat

PNG files preserve transparency (alpha channels) — but they can get enormous. Downsize.pics compresses PNGs while keeping transparency intact. No uploads. 100% private.

Perfect for logos, UI assets, icons, and sprites. The PNG format is the right choice when you need a transparent background — and now you can make those files smaller without converting to JPEG.

Also available as an extension: Chrome Safari

cloud_upload

Drag & drop images here

JPG, PNG, WebP • Max 3MB per file

Files are processed entirely in your browser using a background worker.

File Original Compressed Savings Status

Compression settings

Optimised for PNG · transparency preserved.

bolt Local‑only

Output format MVP: JPEG (browser encoder)

Resize Select a resize mode

Max width (px)

Max height (px)

Quality High (95)

Smaller file Best quality

Advanced (Pro)

check_small Strip EXIF metadata by default
check_small Support other export formats
check_small Batch‑download multiple images without leaving the browser

Why Downsize.pics for PNG Compression?

Alpha Channel Preserved

Unlike converting to JPEG, compressing a PNG keeps the transparent background intact. Every pixel's alpha value is maintained.

Perfect for Logos & UI Assets

PNG is the standard format for logos, icons, and interface graphics. Smaller PNGs mean faster page loads and app launches.

Lossless vs Lossy Control

Adjust the quality slider to choose between maximum compression (smaller file) and lossless output (pixel-perfect). You're in control.

Perfect For

Designers exporting transparent logos and icons
Web developers optimising UI assets for faster pages
Game developers compressing sprites and textures
Anyone needing smaller PNGs without losing the transparent background

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FAQ

Does compressing a PNG remove its transparency?: No. Our PNG compressor preserves the alpha channel — your transparent areas remain fully transparent after compression.
What is the difference between lossless and lossy PNG compression?: Lossless PNG compression reduces file size without changing any pixel values. Lossy compression sacrifices some quality for a much smaller file size.
Why are PNG files so much larger than JPEGs?: PNG uses lossless compression and supports alpha transparency, which requires storing more data per pixel than JPEG's lossy encoding.
Can I compress a PNG that has text in it?: Yes. PNG is the best format for images with sharp text or flat colour areas. Quality 95 or higher will preserve text sharpness.

Compress PNG Images OnlineKeep Transparency, Lose the Bloat