About MP3 Cutter Tool

Who We Are

MP3 Cutter Tool is a free online audio editing tool developed by the Upliftorch team. We believe everyone should be able to edit audio easily — no software to install, no account to create, and no fees to pay. Our goal is to deliver a simple, fast, and secure audio editing experience.

Why Choose Us

There are many audio editing tools available, but most of them require you to upload your files to a server for processing. That's not only slow, it also poses privacy risks. Our tool was designed from the ground up around a completely different philosophy: Privacy First.

All audio processing happens directly in your browser. Your files never leave your device — nothing is uploaded to any server. When you close the page, all data is immediately cleared, leaving no trace behind.

Core Features

• Precise Cutting — Use the intuitive waveform editor to select exactly the audio segment you need, with drag-to-adjust start and end points.
• Multi-Segment Merge — More than just cutting: select multiple segments, reorder them freely, and export them as a single merged file.
• Audio and Video Input — Open common audio formats or extract a video's audio track locally.
• Independent Fades — Configure fade in, fade out, and duration separately for each segment.
• Three Export Formats — Export MP3, WAV, or an iPhone M4R ringtone.
• Zero Installation — Open your browser and start editing. No downloads or software installation required.

Local Processing Architecture

Actual data flow: Choose a file → browser decoding → local editing and encoding → direct browser download. The tool does not create a media-upload request or retain source or exported media on a server.

Our tool is built entirely on modern browser technologies, making full use of the following Web APIs:

• Web Audio API — Handles audio decoding, playback, and processing. This is the browser's native, high-performance audio engine, capable of processing audio data at near-native speeds.
• Canvas API — Renders the real-time waveform display, selection regions, and playback cursor for smooth visual feedback.
• lamejs — A pure JavaScript MP3 encoder that allows us to encode audio as MP3 directly in the browser, without any server-side processing.
• Blob API — Creates files in the browser and triggers downloads, without any data traversing the network.
• WebAssembly media processor — Loaded on demand for first-time video extraction or M4R export, then executed on the current device.

Core audio editing can continue locally after the required components have loaded. Advertising, CDN, cookie-consent, and other website services may still make network requests; those requests do not contain the media you selected.

How to Verify That Media Is Not Uploaded

1. Open your desktop browser's developer tools and select the Network panel.
2. Clear existing entries and filter for Fetch/XHR requests.
3. Choose audio, create segments, preview, and export.
4. Confirm that no request uploads the source media. Advertising, fonts, scripts, and static website files are website-service requests, not media uploads.

See the Privacy Policy for complete details about cookies, advertising, and third-party services.

Our Commitment

We are committed to continuously improving this tool — making it more useful and more powerful. If you have any suggestions or feedback, please reach out through our Contact page. Every piece of input you share drives us forward.

Thank you for using MP3 Cutter Tool. We hope you enjoy it!