Pure Frontend · Brotli Compress/Decompress · Adjustable Quality Level 1-11
Zero Dependencies · Works OfflineWhat Can the Brotli Compressor Do?
The Brotli Compressor is a pure frontend online tool that supports Brotli format compression and decompression of text and files. Brotli is an open-source compression algorithm developed by Google, typically achieving 15-25% better compression ratios than Gzip, and is supported by all major browsers. The tool provides 11 quality levels (1-11) to balance compression speed and ratio. All data is processed locally in your browser and never leaves your device.
Core Features
- Text Compression: Paste any text content, one-click Brotli compression, output Base64 encoding or download .br file
- File Compression: Drag and drop any file, download compressed .br file
- Text Decompression: Paste Base64-encoded Brotli data or upload .br file, one-click decompression
- Adjustable Quality: 1-11 compression levels, level 1 fastest, level 11 highest ratio
- Compression Stats: Shows original size, compressed size, compression ratio, space saved
How to Use
Step 1: Select "Compress" or "Decompress" mode. For compression, input raw text or drag a file. For decompression, input Base64 data or drag a .br file.
Step 2: In compress mode, adjust the quality level slider (1-11). Default level 6 is recommended.
Step 3: Click "Compress" or "Decompress" button, or use Ctrl+Enter shortcut.
Step 4: View compression stats and results. Click "Copy Base64" or "Download .br File" to save.
Use Cases
Web Performance Optimization
Pre-compress static assets (HTML/CSS/JS/fonts), configure Nginx/Apache to serve .br files directly, reducing transfer size by 15-25%.
API Data Compression
Compress API response data to reduce network transfer time, especially beneficial for mobile and high-latency networks.
File Storage Optimization
Compress log files, backup data, and other large files. Brotli saves 15-25% more space than Gzip.
CDN Configuration Verification
Verify Brotli compression effectiveness, compare compression ratios at different quality levels, choose optimal configuration.
Technical Background
Brotli was released by Google in 2015, based on LZ77 algorithm, Huffman coding, and second-order context modeling. Compared to Gzip (based on DEFLATE), Brotli uses a larger dictionary and more complex algorithms to achieve higher compression ratios. In HTTP transmission, Brotli compression is identified by Content-Encoding: br. Nginx requires the ngx_brotli module, Apache uses mod_brotli. Quality level recommendations: level 4-6 for dynamic content (balanced speed), level 11 for static asset pre-compression (maximum ratio).
FAQ
What is the difference between Brotli and Gzip compression?
Brotli typically provides 15-25% better compression ratio than Gzip, though compression speed is slightly slower. Brotli supports 11 quality levels while Gzip supports 9. All modern browsers support Brotli decompression.
Is my data uploaded to a server?
No. All compression and decompression happens locally in your browser using WebAssembly. Your data never leaves your device.
What file size is supported?
Recommended max 50MB per operation. Larger files may cause browser memory issues. Text compression has no strict limit.
How to choose compression level?
Level 1 is fastest with lowest ratio, level 11 is slowest with highest ratio. Level 4-6 is recommended for web resources, level 11 for static asset pre-compression.
What input formats are supported?
Supports text input and file drag-and-drop. Compression outputs Base64 encoding or .br file download. Decompression supports Base64 input and .br file upload.
Browser compatibility?
Requires a modern browser with WebAssembly support (Chrome 57+, Firefox 52+, Safari 11+, Edge 16+).
Feedback: dexshuang@google.com