About SwiftConversion
SwiftConversion is a free, privacy-focused file conversion platform. We believe you should be able to convert files without uploading them to a server, creating an account, or worrying about your data.
Privacy First
Most tools run entirely in your browser. Your files never leave your device. For server-processed tools, files are automatically deleted within 15 minutes.
Fast & Free
No signup, no watermarks, no daily limits on most tools. Just upload, convert, and download. It takes seconds.
600+ Tools
PDF tools, image converters, audio/video tools, data format converters, developer utilities, and more — all in one place.
Zero Storage
We never store your files. Frontend tools never upload anything. Backend tools clean up automatically. Your data is your data.
How It Works
SwiftConversion leverages modern browser technologies like the Canvas API, WebAssembly, and Web Workers to process files directly on your device. This means most conversions happen without any server involvement at all.
For more complex tasks like office document conversions, video transcoding, and OCR, we use a secure backend server. Even then, your files are processed immediately and deleted within 15 minutes. We never log file names or contents.
Technology
- Frontend: Next.js with static site generation for maximum performance
- PDF tools: pdf-lib and pdf.js for in-browser PDF manipulation
- Image tools: Canvas API for real-time image processing
- Data tools: Custom parsers for JSON, XML, YAML, CSV, and more
- Backend: FastAPI with specialized worker pools for heavy processing