Privacy-First Audio Tools
Trim, convert, compress, speed up, and normalize audio files — entirely in your browser. Your files never leave your device.
No signup No uploads No limits
5 Privacy-First Audio Tools
Every tool runs entirely in your browser. Your audio never touches a server.
Audio Trimmer
Cut and trim audio files with visual waveform editing. Select exact start and end points.
Try it freeAudio Converter
Convert between MP3, WAV, FLAC, OGG, AAC, and M4A. Batch support for multiple files.
Try it freeAudio Compressor
Reduce audio file size while maintaining quality. Perfect for sharing and uploading.
Try it freeSpeed Changer
Speed up or slow down audio with optional pitch preservation. From 0.25x to 4x speed.
Try it freeAudio Normalizer
Normalize loudness to industry standards. LUFS targets for Spotify, podcasts, and broadcast.
Try it freeHow It Works
Step 1: Select Your Audio File
Drop your audio file into the tool or click to browse. MP3, WAV, FLAC, OGG, AAC, M4A, and WMA are all supported.
Step 2: Choose Your Tool
Pick from 5 browser-based processing options: trim, convert, compress, change speed, or normalize.
Step 3: Download the Result
Processing happens instantly on your device. Preview the output and download when ready — no upload, no wait.
Your Audio Never Leaves Your Device
SonoCut processes everything locally using WebAssembly. No servers involved, no uploads, no compromises.
Inside Your Browser
No data exits this boundary
No Uploads
Your audio stays on your device. Processing runs locally in your browser using ffmpeg.audio.wasm.
No Accounts
No signup, no login, no email required. Open a tool and start processing immediately.
No Tracking
No analytics tracking your files. We don't know what you process, and we don't want to know.
SonoCut vs. Server-Side Tools
Every major audio tool uploads your file to their servers. SonoCut doesn't.
Who Uses SonoCut?
From podcasters to privacy-conscious users, anyone who needs quick audio edits without uploading their files.
Podcasters
Normalize episode loudness to streaming standards, trim intros and outros, or convert between formats for different platforms.
Content Creators
Compress audio for social media, convert between formats, or speed up recordings to fit platform time limits.
Musicians
Change tempo without affecting pitch, convert between lossless and compressed formats, or trim stems and samples.
General Users
Reduce file size for sharing, trim voice memos, or convert audio for any device — without uploading personal recordings.
Frequently Asked Questions
Everything you need to know about SonoCut's browser-based audio processing.
How does SonoCut work?
SonoCut uses ffmpeg.audio.wasm — a WebAssembly build of FFmpeg — that runs directly inside your browser. Your audio files are processed locally on your device and never sent to any server.
Is SonoCut really free?
Yes, completely free. No signup required, no hidden limits, no watermarks. SonoCut is supported by minimal, non-intrusive advertising.
What audio formats are supported?
SonoCut supports MP3, WAV, FLAC, OGG, AAC, M4A, and WMA. You can convert between any of these formats using the Audio Converter tool.
Does SonoCut work on mobile?
Yes, SonoCut is fully responsive and works on mobile browsers. Audio processing is CPU-intensive, so performance is best on desktop, but mobile works well for most tasks.
Is my audio safe with SonoCut?
Yes. Your audio files never leave your device. Processing happens entirely in your browser — we have no ability to access, view, or store your files at any point.
Ready to Process Your Audio?
Pick a tool and start editing. No signup, no upload, no waiting.
Free forever. No watermark. No account required.