Clean up hiss, hum, fan noise, and room echo from any audio recording. Free, instant, and completely private. Everything runs in your browser. Your audio never leaves your device. Drop your audio file here or click to select a file Supports MP3, WAV, AAC, FLAC, OGG, M4A (Max 500MB on desktop, 100MB on mobile) 1. Upload your recording Pick any audio file: podcast, interview, voice memo, or meeting recording. 2. Noise gets removed Sondra analyzes and filters out background noise directly in your browser. No waiting, no uploading. 3. Download clean audio Save your noise-free file. Ready to publish, share, or edit. What Background Noises Can Sondra Remove? Sondra is designed to handle the most common types of unwanted background sound that show up in everyday recordings: Fan and AC noise: the constant hum from air conditioning, laptop fans, or ventilation systems that sneaks into home studio recordings. Room hiss: the low-level hiss present in most microphone recordings, especially in untreated rooms. Electrical hum: the 50Hz or 60Hz buzz that comes from lighting, power supplies, or poor grounding. Ambient room noise: low-level background sounds like distant traffic, keyboard clicks, or general room presence. For best results, recordings where the voice or main audio is clearly louder than the background noise respond well to noise removal. Very loud background noise may require the Aggressive preset. Why Clean Audio Matters Bad audio kills good content. Research consistently shows that listeners will tolerate poor video quality far longer than they will tolerate poor audio. A podcast with background hiss, a video call with fan noise, or a voice memo buried in room echo all communicate the same thing: unprofessional. Cleaning your audio before you publish, send, or submit takes seconds with Sondra. The difference is immediately noticeable. Cleaner audio means listeners stay longer, audiences trust your content more, and your recordings sound like they were made in a proper studio. Frequently Asked Questions What kinds of noise can Sondra remove?

For best results, your voice or main audio should be clearly louder than the background noise. How to record cleaner audio in the first place Noise removal works best when there's less noise to remove. A few simple habits can dramatically improve your recordings before you even open Sondra. Record in the smallest room available. Small rooms with soft furnishings (bedroom, walk-in closet) produce less echo than large empty spaces. A blanket fort sounds ridiculous but genuinely works. Get closer to the microphone. Doubling your distance from the mic quadruples the background noise relative to your voice. Most people record too far away. 15 to 20cm is a good starting distance for most USB microphones. Turn off fans and AC before recording. HVAC noise is the most common complaint in home recordings. Even a short silence while you record makes a significant difference. Record in early morning or late evening when outside traffic is lower if you're near a road. Use Sondra after recording to handle whatever noise remains. Even a good recording in a quiet room will benefit from light noise removal. It removes the subtle room presence that makes recordings sound home-made rather than professional. Who uses Sondra's noise remover? Recording from home means fan noise, street sounds, and room echo sneak into every episode. Sondra removes them in seconds so your audio sounds like it was recorded in a proper studio, even if it wasn't. YouTubers and video creators Background noise in voiceovers and talking-head videos makes content feel amateur. Clean audio keeps viewers watching longer and makes your channel look more professional. Meeting recordings and voice memos sound cleaner when you remove keyboard clicks, AC noise, and room echo before sharing with your team or client. Online educators Course videos and tutorials require clear audio. Students can focus on the content instead of straining to hear through background noise. More Free Tools Compress video files online free Reduce MP4, MOV, MKV file size Compress MP3 and audio files free Shrink MP3, WAV, podcast files Remove Video Noise Clean up background noise from video recordings We use essential cookies to make Sondra work, and optional analytics cookies to understand how you use it. Your files are never tracked.