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Free PNG to QOI Converter Online - Quite OK Image Format

Convert PNG images to QOI format instantly in your browser. Simple, fast, and lossless compression. Experimental image format for specific use cases.

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Privacy First
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How It Works

Transform your PNG files to QOI (Quite OK Image Format) using our advanced browser-based converter. The process begins by analyzing your PNG file structure and extracting the image data using optimized PNG decoding algorithms. The extracted image data is then processed through our color management system and re-encoded into QOI format using the simple QOI compression algorithm that focuses on encoding speed and simplicity over maximum compression. All processing happens locally in your browser - no uploads, no server processing, complete privacy guaranteed.

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Key Features

  • No file uploads required - works offline
  • 100% privacy focused - client-side processing
  • Browser powered - no software installation
  • Fast processing - WebAssembly technology
  • Free forever - no premium accounts

Supported File Formats

.png

Output Format: QOI

Technical Specifications

input Format PNG (Portable Network Graphics)
output Format QOI (Quite OK Image Format)
compression Type Simple lossless compression optimized for speed
quality Retention 100% lossless quality preservation
color Space Support sRGB, maintains transparency and all color information
max Resolution Up to 4294967295×4294967295 pixels (theoretical)
processing Time 0.2-1 second per image (very fast encoding)

Key Benefits

  • Extremely fast encoding and decoding speed
  • Simple, lightweight format specification
  • 100% lossless quality preservation
  • Full transparency support
  • 100% privacy with local browser processing
  • No file size limitations or conversion quotas
  • Suitable for applications requiring fast image processing

Common Use Cases

  • Game development and real-time graphics
  • Applications requiring fast image encoding/decoding
  • Prototyping and development workflows
  • Specialized tools and image processing pipelines
  • Scenarios where encoding speed trumps file size
  • Educational purposes to understand simple compression
  • Experimental image format testing

Pro Tips

  • Use QOI only for specialized applications that support it
  • Not suitable for web use - browsers don't support QOI
  • Expect larger file sizes compared to PNG
  • Perfect for applications prioritizing speed over compression
  • Keep PNG originals for maximum compatibility

Frequently Asked Questions

QOI is a simple, fast, lossless image compression format designed for speed and simplicity rather than maximum compression. It was created as an alternative to PNG with faster encoding/decoding speeds, though it typically produces larger files than PNG. QOI is experimental and primarily used in specialized applications.
Convert to QOI for faster encoding/decoding speeds in specialized applications, game development, or when working with tools that specifically support QOI. QOI prioritizes simplicity and speed over file size, making it useful for scenarios where compression/decompression speed matters more than storage efficiency.
Generally no. QOI files are typically larger than PNG files because QOI prioritizes encoding speed over compression efficiency. While QOI is lossless like PNG, it uses a simpler compression algorithm that trades file size for speed. Expect QOI files to be 10-50% larger than equivalent PNG files.
QOI has very limited support. It's mainly supported by some image viewers, game engines, and specialized tools. Most web browsers, image editors, and standard applications do not support QOI. It's primarily used in game development and other specialized contexts where fast encoding/decoding is prioritized.
No, QOI is not suitable for web use. Web browsers do not support QOI format, and it offers no advantages over PNG for web applications. PNG remains the best choice for lossless web images with transparency. QOI is designed for specific use cases like game development or applications requiring fast image processing.
QOI and PNG both provide identical lossless quality - no image data is lost during compression. The difference is in file size (PNG smaller) and processing speed (QOI faster). QOI preserves transparency and all color information just like PNG, but with a simpler, faster compression algorithm.
Currently, our converter processes one PNG file at a time to ensure optimal performance. The conversion process is very fast due to QOI's simple algorithm, typically completing in under 1 second, so you can quickly convert multiple files in succession.
Absolutely! Our PNG to QOI converter prioritizes your privacy and security. All conversion happens locally in your browser using WebAssembly - your files never leave your device. No uploads to external servers, no data collection, no file storage. The conversion process is entirely client-side, ensuring your images remain completely private and secure.