Frequently Asked Questions

Cross-platform testing approach:

1. Browser Testing: Test in Chrome, Firefox, Safari, and Edge with our web-optimized formats
2. Mobile Testing: Validate on iOS and Android with different screen densities
3. Desktop Applications: Test native applications on Windows, macOS, and Linux
4. Server-side Processing: Verify backend file handling with various libraries

Use our samples to create automated test suites that run across all target platforms.

Comprehensive upload testing strategy:

• Size Limits: Test files just under, at, and over your size limits
• Format Validation: Try uploading files with correct extensions but wrong content
• Malformed Files: Test with corrupted or incomplete files
• Network Conditions: Simulate slow connections and interruptions
• Concurrent Uploads: Test multiple simultaneous uploads

Our samples include various sizes and can be modified to test edge cases safely.

Modern web audio recommendations:

• AAC: Best overall choice - better quality than MP3 at same bitrates, wide browser support
• MP3: Universal fallback - works everywhere but less efficient than AAC
• Opus: Future-forward choice - excellent quality and compression, growing support
• OGG Vorbis: Open-source alternative - good for Firefox and Chrome

Pro tip: Use AAC as primary with MP3 fallback. Test with our samples to validate your implementation.

Compression types explained:

Test both types with our samples to understand the quality vs. size trade-offs for your use case.

Modern web image strategy:

Implementation: Use WebP/AVIF with JPEG fallback via <picture> element.

Multi-layer validation approach:

1. Client-side: Check file extension and MIME type for UX
2. Server-side: Always validate - never trust client data
3. Magic bytes: Check file headers/signatures
4. Content parsing: Attempt to parse file with appropriate library

// 1. Extension check
if (!filename.endsWith('.jpg')) return false;

// 2. MIME type check  
if (file.type !== 'image/jpeg') return false;

// 3. Magic bytes check (server-side)
if (!startsWithJPEGHeader(fileBytes)) return false;

// 4. Parse attempt
try { parseImage(fileBytes); } catch { return false; }

Use our samples to test each validation layer and ensure robust security.

Large file upload strategies:

• Chunked uploads: Split files into smaller pieces (1-5MB chunks)
• Resumable uploads: Allow continuing interrupted uploads
• Progress tracking: Provide real-time upload feedback
• Background processing: Process files asynchronously
• Direct cloud uploads: Use signed URLs for direct S3/Azure uploads

Modern font loading optimization:

1. Format selection: Use WOFF2 (best compression) with WOFF fallback
2. Preload critical fonts: <link rel="preload" href="font.woff2" as="font">
3. Font-display strategy: Use font-display: swap for body text
4. Subset fonts: Include only needed characters/languages
5. Self-host fonts: Avoid third-party font service delays

@font-face {
  font-family: 'MyFont';
  src: url('myfont.woff2') format('woff2'),
       url('myfont.woff') format('woff');
  font-display: swap;
  unicode-range: U+0020-007E; /* Basic Latin */
}

Test font loading performance with our font samples across different connection speeds.

Comprehensive performance testing approach:

• Baseline measurement: Test with various file sizes (50KB to 5MB+)
• Memory profiling: Monitor RAM usage during processing
• CPU utilization: Track processing load and bottlenecks
• I/O performance: Measure read/write speeds
• Concurrent processing: Test multiple simultaneous operations

Use our graduated file sizes to create consistent performance baselines.

Compression algorithm performance characteristics:

Performance tip: Choose algorithms based on your CPU vs. bandwidth constraints. Test with our archive samples to find the optimal balance.

Adaptive bitrate streaming optimization:

1. Multiple quality levels: Create 240p, 480p, 720p, 1080p variants
2. Appropriate bitrates:
   • 240p: 400-700 kbps
   • 480p: 750-1200 kbps
   • 720p: 1500-3000 kbps
   • 1080p: 3000-6000 kbps
3. Smart switching logic: Monitor bandwidth and buffer health
4. Preloading strategy: Buffer ahead based on connection stability
5. Fallback options: Always provide lower quality alternatives

Regular testing maintenance schedule:

• Monthly: Check for new format specifications and browser updates
• Quarterly: Update test files with new format versions and edge cases
• After major releases: Re-validate all file handling when updating dependencies
• When issues arise: Add specific test cases to prevent regression

Stay current with format evolution - new codecs, compression improvements, and security updates require ongoing validation.

Essential file upload security measures:

• Never trust file extensions: Always validate file content
• Scan for malware: Use antivirus scanning for user uploads
• Isolate processing: Process files in sandboxed environments
• Limit file sizes: Prevent DoS attacks with reasonable limits
• Validate metadata: Check for embedded scripts or malicious data
• Store safely: Keep uploads outside web root directory