PNG Lossless Optimizer

Strip auxiliary metadata chunks (tEXt, zTXt, iTXt) from PNG files losslessly without touching pixel data.

How It Works & Processing Standards

Strip auxiliary metadata chunks (tEXt, zTXt, iTXt) from PNG files losslessly without touching pixel data.

Your input data is never sent to any server and is securely processed on your device.

Current Limits

  • Desktop max file size: 40MB
  • Mobile max file size: 20MB

PNG Lossless Optimizer is a 100% free, browser-based online utility. All calculations and file conversions run locally inside your browser (Local-First) without sending data to remote servers, keeping your documents and inputs strictly private.

How to Use PNG Lossless Optimizer

  1. 1
    Select PNG FileUpload your PNG image.
  2. 2
    OptimizeAncillary chunks are stripped directly from byte streams.
  3. 3
    Download Trimmed PNGSave your optimized PNG file.

Common Use Cases

  • Trimming hidden metadata from web icons for maximum lighthouse performance scores
  • Cleaning PNG assets before building native mobile application bundles
Have feedback or ideas for this tool? Suggest & Inquire →