Compress PNG Online Free

Reduce PNG file size while preserving transparency. Upload up to 10 PNG files at once, set quality and target size, preview before and after, then download — all inside your browser. Files never leave your device.

100% Free

No Sign-up

No Watermark

Up to 8 Files

Download as ZIP

Browser-Based · Private

Message

Drop your PNG files here

or choose a source below

Supports PNG WebP · Up to 10 files

Files

0 / 10

Total Original—

Compressed—

Total Saved—

Slots Used—

Selected File

Width—

Height—

Type—

Original—

Compressed—

Reduction—

No file selected

Click a file in the panel to preview

Original —

Compressed —

Saved —

Compression Quality

Quality Level 75%

Smaller fileBetter quality

Max Output Size (per file)

Limit No Limit

No limit10 MB

Custom: KB

Type any KB value — quality auto-adjusts

Quick Target

Output Format

Max Width (optional)

Leave blank to keep original size

How to Compress a PNG Image

Upload Your PNG Files

Drop up to 10 PNG files at once, or use "Choose Files" to pick from your device, Dropbox, Google Drive, OneDrive, or by URL. Transparent PNGs are fully supported — alpha channels are preserved throughout.

Set Quality & Output Format

Choose PNG to keep full transparency, or switch to WebP for 25–35% smaller files that still support alpha. Use the quality slider or a quick target size to control compression. Click any file in the list to preview the result.

Download Your Compressed PNGs

Download all files as a ZIP or save individually. Every file shows original size, compressed size and reduction percentage so you know exactly what you are saving.

What You Get

Transparency Preserved

Alpha channels are kept intact — logos and icons download clean

Batch Compression

Up to 10 PNG files compressed at the same time

Target Size Control

Auto-hit 100 KB, 200 KB, 500 KB, 1 MB and more

100% Private

Your images never leave your device

ZIP Download

Download all compressed PNGs in one ZIP

Mobile Friendly

Works on iPhone, Android, iPad and all browsers

Why Compress Your PNG Files?

PNG files are the format of choice for logos, screenshots, illustrations and anything that needs a transparent background — but they can balloon to several megabytes. A single high-resolution screenshot can exceed 5 MB, slowing page loads and getting rejected by email clients.

The most important thing about compressing a PNG is keeping the transparency intact. When you compress a PNG here, the alpha channel is fully preserved. Your logos with cutout backgrounds, icons with soft edges, and graphics with glass effects all come out exactly as they went in — nothing gets flattened to white.

You can also convert your PNG to WebP, which typically saves another 25–35% while still supporting transparency in all modern browsers. The before-and-after preview lets you compare quality before you commit to downloading.

Because everything runs in your browser, there is no upload step, no waiting, and no privacy concern. Your PNG files stay on your device from start to finish.

Frequently Asked Questions

Common questions about compressing PNG images

Does PNG compression keep transparency?

Yes, completely. When you compress a PNG here, the alpha channel (transparency) is fully preserved. Your logos, icons and graphics with transparent backgrounds download exactly as they look in the editor.

Is this PNG compressor really free?

Yes, fully free with no limits, no sign-up and no watermark added to your files.

Does my PNG file get uploaded to a server?

No. Everything is processed directly in your browser using the canvas API. Your files never leave your device, so they stay completely private.

Should I compress PNG or convert to WebP?

For the web, WebP is usually the better choice — it is 25–35% smaller than PNG while still supporting transparency. PNG is better when you need maximum compatibility with older software or print workflows.

Can I compress multiple PNG files at once?

Yes, you can upload and compress up to 10 PNG files at the same time and download them all as a ZIP.

How do I hit a specific file size like 200 KB?

Use the Quick Target buttons (100 KB, 200 KB, 500 KB…) and the tool automatically adjusts quality to match. Or type any custom KB value in the Custom input box.

Can I use this on my phone?

Yes. The tool works on iPhone, Android, iPad and any modern browser — no app needed.