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About Compress PNG — Free Online Tool
Compress PNG re-writes a PNG smaller, with three settings to pick from: Recommended, Extreme and Lossless. If the re-encode comes out no smaller than the file you started with, you get your original back rather than something bigger.
The two lossy settings round every red, green and blue value onto a coarser ladder — 32 steps per channel on Recommended, 16 on Extreme — which lengthens the runs that PNG's DEFLATE stage then compresses. Fully transparent pixels are skipped, so the alpha channel comes through untouched. Lossless changes no pixel value at all and only re-writes the stream, which is why it saves very little. Flat logos and screenshots gain the most; smooth gradients can band.
Quantising and re-encoding both happen on a canvas in your own tab, so the PNG never leaves your machine.
Slimming UI assets and icon sets before a deploy, reducing a logo exported at full 24-bit depth, cutting documentation screenshots down, and saving bytes where transparency rules out switching to JPEG.
Also known as: shrink png · reduce png size · png compressor · optimize png · lossless png compress · make png smaller
When to use it
Uncompressed PNG images can be heavy, slowing down web pages and mobile applications. A smaller PNG cuts bandwidth and load time — at the cost of some colour depth, so keep your original if the exact pixel values matter.
How it works
Everything happens on a canvas in your tab. Every red, green and blue value is rounded onto a ladder of 32 steps per channel, which lengthens the repeated runs that PNG's DEFLATE stage then squeezes, and the shortened stream is written back out as a PNG. Fully transparent pixels are skipped, so the alpha channel comes through untouched.
Rounding Colours, Not Building A Palette
Rounding colour values is what makes this save anything: fewer distinct colours means longer runs for DEFLATE to pack. The result is still a truecolour PNG rather than an indexed-palette one, so the saving depends on how flat your image is. Logos and screenshots do well; smooth gradients can band. If the re-encode comes out no smaller, your original file is handed back instead of something bigger.
Preserves Alpha Transparency
Full alpha transparency is completely retained, making this tool perfect for logos, transparent icons, UI components, and product photos.
Private & Secure In-Browser Processing
Your images are never sent across the internet to a third-party server. All compression runs 100% inside your local browser memory for complete privacy.
How to Use Compress PNG in 4 Easy Steps
Follow this simple guide to process your files in seconds directly inside your browser tab.
Select or Drop Your PNG
Drag and drop your PNG directly into the Compress PNG workspace above or click 'Choose files'. You can process up to 30 files in a single run.
Configure Your Preferences
Adjust the available optimization sliders, target formats, or custom options. Uncompressed PNG images can be heavy, slowing down web pages and mobile applications. A smaller PNG cuts bandwidth and load time — at the cost of some colour depth, so keep your original if the exact pixel values matter.
Instant In-Browser Execution
The client-side engine executes Compress PNG locally on your device hardware with zero server latency and 100% private in-memory sandboxing.
Preview & Download PNG
Inspect the processed file, compare file size savings or output quality, and click Download to save the finished PNG file directly to your disk.
Why Use Compress PNG on ShortTrick
Engineered for maximum speed, strict privacy, and frictionless digital productivity.
100% Private & Local
Files processed with Compress PNG never leave your computer or phone. Zero cloud uploads, zero tracking, and zero risk.
Blazing Fast Engine
Powered by compiled WebAssembly code running directly in your browser with sub-second execution for Compress PNG.
No Paywall or Account Required
Compress PNG is completely free with no hidden charges, watermarks, email signups, or artificial daily limits.
High-Fidelity Quality
Advanced algorithms preserve crisp vector text, clear colors, and structural layout integrity.
Generous 50 MB Size Limit
Handle files up to 50 MB and process up to 30 files in convenient batches with Compress PNG.
Cross-Device Compatibility
Runs seamlessly in modern browsers on Windows, macOS, Linux, iOS (iPhone/iPad), and Android.
Supported Formats & Limits
Designed for high performance with browser-side memory guarantees.
50 MB
30
Frequently Asked Questions About Compress PNG
Common questions regarding Compress PNG, data privacy, file format compatibility, and usage limits.
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