Reduce PNG image file size while preserving transparency and visual quality. Compress screenshots, logos, graphics, and multiple PNG images securely inside your browser.
Supports .PNG images with transparent alpha channels. Multi-file batch support. 100% private.
Follow 5 simple steps to reduce PNG file size while keeping sharp graphics and transparent backgrounds intact.
Drag and drop single or multiple .PNG files (screenshots, logos, graphics) into the drop zone.
Select Recommended, Lossless, Target KB limit (<50KB / <100KB), or set custom color palette limits.
Optimization runs 100% locally in your browser using HTML5 Canvas & Blob APIs.
View exact output file sizes, total saved percentage, and test the Before/After slider with checkerboard transparency.
Download individual PNG files or export your entire batch as a single ZIP archive.
Optimizing PNG photos improves web performance, reduces bandwidth costs, and preserves transparency.
Compress heavy transparent PNG logos and website hero graphics for faster page load times and SEO scores.
Screenshots saved as 32-bit PNGs are often multi-megabyte files. Compression reduces them by 70%-85% without blur.
Maintain pristine alpha-channel transparency while stripping non-essential EXIF metadata chunks.
PNG (Portable Network Graphics) is an uncompressed or losslessly compressed raster format supporting 32-bit RGBA color channels. Because PNG preserves exact pixel colors and alpha-channel transparency, unoptimized files can easily exceed several megabytes.
Lossless PNG compression reorganizes internal Deflate data chunks, strips EXIF metadata tags, and optimizes delta filter predictions without altering a single pixel's RGB or alpha value. Lossy PNG compression (such as color quantization to 256 colors) reduces the overall palette size to achieve massive 70%-85% file size savings while maintaining visual fidelity.
PNG's greatest advantage over JPEG is full 8-bit alpha transparency. ReducerImage's PNG engine preserves alpha channel data by default across all compression modes. Transparent pixels remain transparent when displayed on websites, presentations, or app interfaces.
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Answers to common questions about optimizing PNG images.
PNG compression is an optimization process that reduces file size by eliminating redundant pixel data and optimizing color palettes while keeping transparent backgrounds intact.
Yes! In Lossless mode, pixel colors and transparency are preserved 100% while stripping metadata and optimizing compression chunks for smaller file size.
Select Target File Size mode and enter 100 KB. Our engine performs a real-time binary search to calculate the exact color palette and scale needed to fit under 100KB.
Yes. Transparency is preserved by default. Transparent background pixels are never flattened unless you explicitly choose to fill them with a background color.
PNG files store lossless 32-bit color data and alpha channels. High-resolution screenshots and graphics with millions of unique colors can result in multi-megabyte files.
Yes. ReducerImage supports batch PNG compression. Select multiple PNG photos and download them individually or as a single ZIP archive.
Reducing colors (quantization to 256 or 128 colors) significantly shrinks file size. For logos, icons, and screenshots, color reduction is visually imperceptible.
No. All PNG compression runs 100% locally inside your web browser. Your private images never leave your device.