Free Online Image Converter
Convert iPhone HEIC, JPG, PNG, WebP, AVIF, and BMP with 100% native quality in under 100ms. Zero server uploads, zero file limits, 100% private.
Drag & drop images here, or browse
Uploads instantly convert only to jpg with zero delay.
Built for speed. Designed for complete privacy.
Most online image converters upload your personal photos to their servers and degrade quality. FastImg works entirely on your device with 100% pixel fidelity guaranteed.
100% Private — Never Uploaded
Your photos and images stay on your computer or phone. They are never sent over the internet or saved to any cloud server.
Instant & No Wait Queues
Conversions happen instantly on your device. No waiting for slow servers to finish processing your files.
Batch Convert Multiple Images
Convert between WebP, PNG, and JPG in any combination. Convert dozens of images at the same time with one click.
High Quality & Smaller File Size
Smart image compression maintains sharp detail and vibrant colors while cutting down file sizes for faster websites and sharing.
How FastImg compares to traditional converters
| Feature | FastImg (In-Browser) | Other Online Converters |
|---|---|---|
| Server Uploads | Never (0 bytes uploaded) | Uploaded to third-party cloud |
| File Size Limits | No artificial limit | Limited (e.g. 5MB–25MB max) |
| Conversion Speed | Instant | Slow upload + queue wait time |
| Photo Privacy | 100% Private on your device | Stored on remote servers |
Frequently Asked Questions
Everything you need to know about FastImg’s private, in-browser conversion.