Free Online File Converter Zero Uploads. Total Privacy.
SwiftConverts processes your images, PDFs, and videos directly inside your browser using WebAssembly. Files never leave your device — no uploads, no waiting, no accounts.
18+
Free Tools
…
Files Converted
100%
Browser-Based
0
Server Uploads
18+ Free Conversion Tools
Select a tool to start converting instantly. No uploads, no accounts, no waiting.
Images
Compress PNG photos to smaller JPG files
Convert JPEG to lossless PNG with transparency
Convert WebP images to universal JPG format
Convert iPhone HEIC photos to JPG
Shrink JPG files with modern WebP compression
Convert PNG to WebP — smaller files, same quality
Rasterize SVG vectors to high-res PNG
Resize images to exact pixel dimensions
Combine images into a single PDF document
PDF Tools
How It Works
Three steps, no surprises.
Select Your File
Drag and drop or click to browse. Supports images, PDFs, and videos up to 500MB.
Convert in Browser
Your file is processed locally using WebAssembly. Nothing is uploaded to any server.
Download Instantly
Your converted file is ready in seconds. Download it directly to your device.
Why SwiftConverts?
Unlike Smallpdf or ILovePDF, your files never leave your device.
| Feature | SwiftConverts | Smallpdf | ILovePDF |
|---|---|---|---|
| No file uploads | ✓ | ✗ | ✗ |
| No account required | ✓ | ✗ | ✗ |
| 100% free tools | ✓ | ✗ | ✗ |
| Works offline (PWA) | ✓ | ✗ | ✗ |
| Client-side processing | ✓ | ✗ | ✗ |
| Video conversion | ✓ | ✗ | ✗ |
HEIC vs JPG: The Complete Guide to iPhone Photo Formats
Apple switched iPhones to HEIC by default — but what exactly is it, how does it compare to JPG, and when should you convert? Everything you need to know.
How to Reduce PDF File Size Without Losing Quality (2026)
Large PDFs are a headache to email and share. Here are the most effective techniques to shrink PDF file size — including free browser-based methods.
WebP vs JPG vs PNG: Which Image Format Should You Use?
Choosing the right image format affects file size, quality, and compatibility. This guide breaks down when to use WebP, JPG, or PNG for different use cases.
Why Offline Conversion Matters
Traditional converters force you to upload sensitive documents to their servers — creating privacy risks and upload delays. SwiftConverts uses modern WebAssembly and Canvas APIs to run conversion algorithms directly in your browser. Your files stay on your device, every time.
Zero Data Exposure
Files never touch our servers
Instant Processing
No upload queue, no waiting
Works Offline
Install as a PWA, convert anywhere