About FileMock
Simplifying testing workflows for developers and QA engineers with instant, privacy-first mock file generation.
Our Mission
Developer First
Built by developers, for developers. We understand the frustration of creating test files manually and the time wasted on repetitive tasks.
Privacy First
All file generation happens in your browser. No uploads, no servers, no registration. Your testing data stays completely private.
The Story
FileMock was born from a simple frustration: spending too much time creating test files for development and QA workflows. Whether testing file upload features, API endpoints, or storage systems, developers constantly need mock files of specific sizes and formats.
Instead of hunting for sample files online or manually creating dummy content, we built a tool that generates exactly what you need, instantly, with precise size control.
Today, FileMock serves thousands of developers worldwide, helping them focus on building great software instead of preparing test data.
What We Offer
Video Files
MP4, MOV, AVI, MKV, WebM, FLV
Audio Files
MP3, WAV, OGG, M4A, WebM
Images
PNG, JPG, WebP, BMP, GIF, HEIC, TIFF
Documents
PDF, DOCX, XLSX, TXT, JSON, CSV
Our Values
Fast
Generate files instantly with client-side processing. No waiting for uploads or server processing. Create test files in seconds, not minutes. Perfect for agile development workflows where speed matters.
Free
Always free for developers, no limits or hidden costs. We believe developer tools should be accessible to everyone, from solo developers to large enterprise teams. No premium tiers or usage restrictions.
Reliable
Consistent results for your testing and development needs. Built with modern web standards and thoroughly tested across different browsers and devices. Dependable file generation you can trust.
Common Use Cases
QA Testing
- • Test file upload functionality with various formats and sizes
- • Validate file processing and storage systems
- • Create edge cases for testing error handling
- • Generate files for automated testing suites
Development
- • Mock data for API endpoints and services
- • Test media processing and conversion features
- • Validate database storage and retrieval systems
- • Create sample files for UI/UX development
DevOps & CI/CD
- • Generate test files for automated deployment pipelines
- • Test file backup and recovery systems
- • Validate cloud storage integrations
- • Create performance testing datasets
Education
- • Teaching file formats and data structures
- • Creating examples for coding bootcamps
- • Demonstrating file handling concepts
- • Building practical programming exercises