Audio Recorder
Record audio from your microphone and download it as a WAV file - runs entirely in your browser.
Record audio from your microphone and download it as a WAV file - runs entirely in your browser.
This free Audio Recorder from KX Toolkit is part of our all-in-one online toolkit. It runs entirely in your browser, so your data never leaves your device for client-side operations. 100% free, forever - no paywall, no credit card, no trial.
How to use the Audio Recorder
- Upload your audio file.
- Pick the output format or edit options.
- Click "Process" and wait for the conversion.
- Download the result.
What you can do with the Audio Recorder
- Convert WAV to MP3 for smaller file sizes.
- Trim silence from the start and end of a recording.
- Normalise volume across multiple podcast clips.
- Prep audio for upload to social platforms.
Why use KX Toolkit's Audio Recorder
- Browser-based: Works on Windows, macOS, Linux, iOS and Android - no install, no extension.
- Privacy-first: Client-side tools never upload your data; server-side tools delete files right after processing.
- Mobile-friendly: Full feature parity on phones and tablets - not a stripped-down view.
- Fast: Optimised for instant feedback. No artificial waiting screens, no email-gated downloads.
- One hub for everything: 300+ tools across SEO, text, image, PDF, code, color, calculators and more - skip switching between sites.
Tips for the best results
For lossy formats (MP3, AAC), avoid converting back and forth multiple times - every round-trip degrades audio quality.
Related Audio Tools
If you find this tool useful, explore the full Audio Tools collection or browse our complete tool directory. KX Toolkit is built for marketers, developers, designers, students and anyone who needs a quick utility without signing up for yet another SaaS.
How does the Audio Recorder capture sound from my microphone?
The tool uses the browser's MediaRecorder API combined with getUserMedia to access your microphone. When you click record, the browser asks for microphone permission and then streams audio data into memory. Once you stop recording, the captured chunks are assembled into a single audio blob you can play back or download as a WAV file. Everything happens client-side, so no audio is uploaded to a server during the process.
Why does my browser ask for microphone permission and what happens if I deny it?
Modern browsers require explicit permission before any web page can access the microphone, which protects your privacy. If you deny the prompt, the recorder cannot start and you will see an error message. To enable it later, click the lock or microphone icon in the address bar, change the permission to Allow, and reload the page. You can also reset site permissions in your browser's privacy settings.
Which browsers and devices support this audio recorder?
The recorder works in all modern browsers that support the MediaRecorder API, including Chrome, Edge, Firefox, Safari 14.1+, and Opera, on both desktop and mobile. Older browsers like Internet Explorer are not supported. On iOS, Safari is the only fully supported browser because of platform restrictions. For best results, use the latest version of Chrome or Edge, and make sure your device has a working microphone connected.
In what format is my recording saved and can I convert it to MP3?
The tool downloads recordings as WAV files, which are uncompressed and offer high quality but larger file sizes. WAV is universally supported by audio editors, DAWs, and media players. If you need MP3 or another compressed format, run the downloaded WAV through a free converter like Audacity or an online MP3 encoder. Browsers do not natively encode MP3 due to historical licensing constraints, which is why WAV is the default output.
Is my recorded audio uploaded anywhere or stored on a server?
No, everything stays on your device. The recording is held in your browser's memory as a Blob object and saved directly to your local downloads folder when you click download. No audio is transmitted over the network, sent to our servers, or shared with third parties. Once you close the browser tab, any unsaved audio is discarded automatically, making this a private and safe option for sensitive voice memos.
How long can I record and is there a maximum file size?
There is no fixed time limit imposed by the tool, but practical limits depend on your device's available memory because the audio is buffered in RAM until you stop. Most modern computers can comfortably handle 30 to 60 minutes of recording. For very long sessions, expect WAV file sizes of around 10 MB per minute at standard quality. If your tab crashes during a long recording, try shorter segments and combine them later.
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