How to Use Test File Generator
Create custom test files with precise specifications for upload testing, system validation, and performance analysis. This guide covers everything you need to know.
What is Test File Generator?
Test File Generator is a developer-focused tool that creates custom PDF files with specific characteristics for testing upload systems, file processing pipelines, and application performance.
Unlike simple dummy file generators, this tool gives you granular control over file size, content complexity, and composition - perfect for stress testing and edge case validation.
Step-by-Step Guide
Configure Text Settings
- Choose language: English (Lorem Ipsum), Japanese (Dummy Text), or Mixed
- Adjust text amount slider (0-100%) to control text density per page
Set Image Parameters
- Select image type: Hard to Process (complex patterns) or Easy to Process (simple shapes)
- Choose image size: Small (200x200), Medium (400x400), or Large (600x600)
- Set images per page (0-5) to control image density
Define Target File Size
- Use slider to set target file size (0.1 - 10 MB)
- Watch real-time size estimation update as you adjust settings
- Tool automatically adjusts page count to match target size
Preview and Download
- Check live preview to verify file appearance (updates automatically)
- Navigate through pages using Previous/Next buttons
- Click "Generate & Download" when satisfied with preview
Key Features
Size-First Approach
Specify exact file size (0.1-10 MB) and let the tool automatically adjust pages and compression to match your target.
Processing Difficulty Control
Choose between "hard to process" (complex patterns) or "easy to process" (simple shapes) images for realistic testing.
Multi-Language Text
Generate content in English, Japanese, or mixed language for internationalization testing scenarios.
Real-Time Preview
See your file as you configure it with live PDF preview and instant size estimation updates.
Common Use Cases
Upload Testing
Test file size limits, validation rules, and error handling in upload systems. Generate files at exact size boundaries to verify edge cases and ensure proper handling of various file sizes.
Image Recognition Testing
Use "hard to process" images to stress test OCR systems, image recognition pipelines, and computer vision algorithms. Verify your system handles complex patterns correctly.
Performance Benchmarking
Create files of varying sizes to test system performance, identify bottlenecks, and establish baseline metrics for your application's file processing capabilities.
Text Extraction Testing
Generate multi-language PDFs to verify text extraction accuracy, character encoding handling, and internationalization support in your document processing pipeline.
Troubleshooting
Preview shows blank or white
Solution: Wait 2-3 seconds for generation to complete. Complex settings (many images, hard patterns) take longer. Try reducing image count or switching to "easy to process" mode.
File size not exactly as specified
Solution: The displayed size is an estimate. Actual file size may vary by ±10% depending on content complexity. This is normal and expected behavior.
Download failed or browser freezes
Solution: Try a smaller file size (under 5 MB) or reduce images per page. Very large files (8-10 MB) may strain browser memory. Consider using a different browser if issues persist.
Pro Tips
- 💡Start with smaller files (1-2 MB) to validate your workflow before generating larger test files
- 💡Use "hard to process" images to catch edge cases in your image processing pipeline early in development
- 💡The filename includes a timestamp (YYYYMMDD-HHMMSS) so files never overwrite each other automatically
- 💡Everything runs in your browser - no data is sent to servers, ensuring complete privacy and security
- 💡Preview updates automatically as you adjust settings - no need to click "generate" to see changes
Ready to Generate Test Files?
Create custom test files instantly with precise control over size and content. Perfect for developers and QA engineers.
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