Everything stays local
Processing runs in your browser via WebAssembly. Your files never leave the device.
Privacy by design
Your files, processed in your browser. Nothing is ever sent.
Every Sunasty tool runs entirely on your device. Your data passes through no server — by design, not by promise.
- 0
- byte sent
- 100%
- in the browser
- ∞
- files, no server limit
Works offline
Once the page is loaded, cut the network: the tools keep working.
No account, no tracking
No sign-up and no tracking cookies are required to use the tools.
Tools
A suite of fast, private and free utilities.
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Resize images
Resize and convert your images (JPEG, PNG, WebP) without uploading them.
- Coming soon
Read EXIF metadata
View and strip EXIF metadata from your photos without sending them to a server.
- Coming soon
Merge PDF files
Combine multiple PDF files into one, directly in your browser.
- Coming soon
Extract audio from MP4
Extract the audio track from your MP4 videos as MP3, without server-side conversion.