Convert PNG to QOI Online Free
Convert PNG to QOI — a fast, lossless image format perfect for games and real-time applications.
ToFormat — free online converter
Upload your files
Max file size: 30MB · Up to 20 files at once
Why ToFormat?
Fast & Lossless
QOI (Quite OK Image) is designed for speed. It compresses losslessly with simple algorithms, making encoding and decoding extremely fast — ideal for real-time apps.
Excellent Compression
QOI achieves compression comparable to PNG but with much simpler code. Your PNG images become smaller without losing any quality.
Transparency Support
QOI supports RGBA with full alpha channel. If your PNG has transparency, it's preserved perfectly in the QOI output.
About the Formats
🖼️ What is PNG?
PNG (Portable Network Graphics) is a lossless raster format created in 1996. It supports full alpha transparency, 24‑bit color, and is widely used for web graphics, logos, and screenshots. PNG uses DEFLATE compression.
All PNG conversion tools →⚡ What is QOI?
QOI (Quite OK Image) is a lossless image format created in 2021 by Dominic Szablewski. It features simple, fast encoding/decoding, good compression (often better than PNG), and supports RGB and RGBA. Designed for scenarios where speed matters.
All QOI conversion tools →How to Convert
Upload PNG
Drag and drop your PNG files. You can upload up to 20 at once.
Choose options
QOI is always lossless. Just select whether to include alpha (if your PNG has transparency).
Download QOI
Your QOI files are ready. Download individually or as ZIP. Files auto-delete in 10 minutes.
When to Convert PNG to QOI
🎮 Game Development
QOI's fast decoding is perfect for loading textures in games. Convert PNG assets to QOI for quicker load times and runtime performance.
💡 For GPU textures: try PNG to DDS →📱 Mobile Apps
On mobile, CPU time matters. QOI decodes faster than PNG, reducing app startup time and memory usage.
💡 For web: try QOI to PNG →⚡ Real-Time Applications
Any app needing instant image loading (UI frameworks, image viewers) benefits from QOI's simplicity.
💡 Alternative fast format: PNG to BMP →📂 Archiving Simple Graphics
For icons, UI elements, or pixel art, QOI offers lossless storage with good compression and fast access.
💡 Universal lossless: PNG to TIFF →Format Comparison
| Format | PNG | QOI |
|---|---|---|
| Compression | Lossless | Lossless |
| Transparency | Yes | Yes |
| File Size | Larger | Larger |
QOI is newer and less supported than PNG, but its speed is unmatched. For maximum compatibility, consider keep PNG. For games, PNG to QOI can be a game-changer.
💡 Pro Tips
- QOI is always lossless. You don't need to worry about quality settings — perfect for archival.
- Decoding QOI is extremely fast — often 2-3x faster than PNG. Great for games and real-time apps.
- The format is simple to implement — many developers add QOI support to custom engines easily.
- QOI files are typically 20-30% smaller than uncompressed BMP and often smaller than PNG for certain images.
- If your PNG is animated (APNG), QOI does not support animation. Use PNG to GIF instead.
- QOI supports RGBA transparency — we preserve full alpha channel from your PNG.
- For web delivery, QOI is not supported natively in browsers. Use PNG or WebP for websites.
How PNG to QOI Conversion Works
QOI is a simple lossless format that encodes pixel data using run-length encoding, differential encoding, and a small lookup table. When you convert PNG to QOI, our servers decode the PNG to raw RGB(A) pixels, then compress them using the QOI algorithm. The process is entirely lossless — every pixel is preserved exactly.
Because QOI is designed for speed, the conversion is very fast. Files are processed in memory and deleted after 10 minutes.
PNG vs QOI: Key Differences
PNG offers excellent lossless compression and is universally supported, but decoding can be slower. QOI is also lossless, often with similar or slightly larger file sizes, but decoding is much faster. QOI is also simpler to integrate into custom software.
Choose PNG for web delivery and compatibility; choose QOI for applications where decoding speed is critical, such as games or real-time systems.
QOI in Game Development
Game engines often need to load many textures quickly. QOI's fast decoding reduces level load times and texture streaming overhead. It's a drop-in replacement for PNG in many pipelines, with no patent issues.
You can also convert QOI back to other formats using our QOI to PNG or QOI to WebP tools when needed.