SoundTools

SoundTools is a free browser-based audio toolkit with more than 35 tools for editing, converting, and transforming audio. Its official site lists text-to-speech, vocal removal, stem splitting, voice changing, voice cloning, noise removal, speech-to-text, pitch correction, audio conversion, trimming, metadata editing, music visualization, and soundboard creation. Processing is designed to run locally in the browser using Web Audio API, WebAssembly, or ONNX Runtime for supported AI tools, so files are not uploaded to a server. No account, subscription, file limit, or watermark is required; the site is supported by display advertising.

✨ Key Features

• Text to speech — Generate speech with browser-based AI voices.
• Vocal remover — Separate vocals and instrumentals from songs.
• Stem splitter — Split songs into vocals, drums, bass, and other stems.
• Voice changer — Apply pitch, formant, distortion, reverb, and echo effects.
• Voice cloning — Use supported local voice-generation workflows.
• Noise remover — Reduce hiss, hum, wind, and background noise.
• Speech to text — Transcribe audio in the browser.
• Pitch correction — Tune singing and vocal recordings.
• Audio converter — Convert MP3, FLAC, WAV, AAC, OGG, and other formats.
• Editing utilities — Trim, join, pitch-shift, boost volume, and edit metadata.
• Creative tools — Make visualizers, soundboards, and music effects.
• Privacy by architecture — Keep audio on the user’s device during supported processing.

💳 Pricing

• Free forever — The official site says all tools are free with no subscriptions or hidden fees.
• No account required — Use tools without registration.
• No file limits or watermarks — The site states there are no file limits or watermarks.
• Funding — The service is supported by non-intrusive display advertising.

⚖️ Alternatives Compared

🎯 Use Cases

• Podcast cleanup: Remove background noise and trim recordings.
• Music remixing: Isolate vocals or split stems.
• Voice experiments: Change or tune a voice recording.
• Accessibility: Convert text to speech or speech to text.
• Format conversion: Convert audio without installing software.
• Social clips: Cut and add effects to audio for short-form content.
• Practice: Slow tracks or adjust pitch for musicians and language learners.
• Private processing: Work with audio locally when browser support applies.