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Reduce your PNG images to 100KB or less. Preserves transparency. Free, fast, and secure. Works entirely in your browser.
Or drag and drop files here
At 100KB, PNG images retain excellent quality and detail while being small enough for most web and form upload requirements. OneWeeb compresses PNG files by intelligently reducing image dimensions in small increments until the file fits under 100KB, preserving transparency and lossless quality throughout the entire process.
A 100KB PNG is perfect for website graphics, transparent logos, UI screenshots, and document uploads. Many content management systems, forums, and e-commerce platforms set 100KB as their PNG upload limit. US government portals, university application systems, and professional licensing boards frequently require images under 100KB. At this size, even detailed graphics with text and fine lines remain sharp and readable.
Everything runs locally in your browser using the HTML5 Canvas API. Your designs, logos, screenshots, and confidential documents never leave your device. Unlike TinyPNG, Compressor.io, or iLoveIMG which upload your files to remote servers, OneWeeb processes everything client-side. Select your PNG, click compress, and download the optimized file in seconds.
PNG (Portable Network Graphics) uses lossless compression, meaning every pixel is preserved exactly. However, lossless compression alone cannot always reach a specific target like 100KB. OneWeeb's approach is smart: it progressively scales down the image dimensions while keeping the output as a proper PNG file. A 2000x1500 pixel screenshot might scale to 800x600 to fit within 100KB — still perfectly readable for web use, forms, and thumbnails.
This method is ideal for transparency-critical images like logos, icons, and UI elements. The alpha channel (transparency data) is fully preserved in the output. If your image has a transparent background, it will still have a transparent background after compression.
Choose PNG when you need transparency (logos on different backgrounds), sharp text rendering (screenshots, diagrams), or lossless quality for graphics. Choose JPG for photographs and complex images with many colors — JPG typically achieves 60-80% smaller file sizes than PNG for the same visual quality on photos. If you do not need transparency, our JPG 100KB compressor will produce a smaller, higher-quality result for photographic images.
Yes. Transparency is fully preserved during compression. The output is still a proper PNG file with alpha channel support, perfect for logos and graphics that need to sit on different backgrounds.
Try our PNG to 50KB compressor for stricter limits. For the smallest possible file size, consider converting to JPG using our PNG to JPG converter — JPG files are typically 60-80% smaller than PNG.
Yes, completely free with no limits. All processing happens in your browser — your files are never uploaded to any server. No sign-up, no watermarks, no restrictions.