2026 Privacy Report: Which Free Online Tools Actually Keep Your Data Local?
We tested 28 browser-based and server-dependent tools by monitoring network requests during file processing. Here are the results.
Audio Tools
Trim, convert, and add effects to audio files with waveform visualization. All processing happens in your browser.
What you get
Privacy first
SliceTune is designed to be fast, simple, and distraction-free. Open it in any modern browser and get started in seconds — no downloads, no installations, no account required.
Most of our file tools process everything locally in your browser. Productivity tools store data locally by default with optional cloud sync when you sign in.
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We tested 28 browser-based and server-dependent tools by monitoring network requests during file processing. Here are the results.
Need to trim a clip or convert an audio file? We compared the top free browser-based audio editors on features, format support, and privacy.
Your files should never leave your device. Here's why client-side processing matters and how our tools keep your data private.
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