Compress PNG Images Online: Lossless & Transparency Preserved
Optimize PNG graphics, transparent logos, and UI screenshots directly in your browser. Reduce file sizes by up to 70% without sacrificing alpha transparency, introducing color banding, or transmitting data over the web.
Why Transparent PNG Assets Need Specialized Compression
Unlike JPEG which discards alpha information entirely, PNG stores full 8-bit or 16-bit transparency per pixel. Standard compressors often ruin delicate antialiasing around transparent borders, creating unsightly gray or white halos.
TableView's rendering engine preserves 32-bit RGBA color pipelines, stripping non-essential color profiles and ancillary metadata chunks (tEXt, zTXt, iTXt) to deliver minimal payload sizes without fringe artifacts.
Frequently Asked Questions
How does PNG compression preserve transparent backgrounds?
TableView uses HTML5 canvas 2D contexts with alpha channel preservation. It cleans up redundant metadata chunks, optimizes color indexing, and applies lossless or near-lossless quantization without corrupting transparent pixels or producing halo artifacts.
Should I compress PNG or convert it to WebP?
If you need universal legacy compatibility or strictly lossless graphic assets (like UI icons, vector logos, and design mockups), PNG is optimal. If your goal is website loading speed and smaller bandwidth, WebP offers up to 40% smaller file sizes while still supporting transparency.
Can I compress multiple PNG screenshots at once?
Yes. TableView supports batch dragging and dropping. Drop dozens of PNG screenshots into the browser, review the compressed size reduction for each, and download all optimized files in a single organized ZIP archive.
Are my confidential company screenshots uploaded to a server?
Never. All image parsing and compression execute inside your browser local memory sandbox. No telemetry, image payloads, or logs are transmitted to any remote server.