Is my recording uploaded anywhere?

No. Recording uses the MediaRecorder API entirely in your browser. The audio never leaves your device.

What format is the download?

Recordings are downloaded as WAV (16-bit PCM) for maximum compatibility. The in-browser capture itself uses the format your browser supports.

How long can I record?

There is no artificial limit. Recording continues until you press Stop, limited only by your device memory.

返回 Ercc

在线录音机

用麦克风录音并下载为 WAV 文件。一切都在浏览器中完成。

No Upload Required Lossless Output Instant Download PCM 16-bit WAV

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Click record to start

Recording runs entirely in your browser using the microphone — nothing is uploaded. Microphone access is required.

How It Works

Three simple steps —everything happens in your browser.

Upload MP3 file

Drag and drop or click to select your MP3 audio file from your device.

Convert to WAV

Your MP3 is decoded and re-encoded as uncompressed PCM 16-bit WAV audio instantly.

Download WAV

Download your lossless WAV file immediately. No quality loss, no waiting.

为什么使用 Ercc 在线录音机？

100% Private —No Server Uploads

Your audio files never leave your device. All conversion uses the Web Audio API locally in your browser.

Lossless WAV Output

Get uncompressed PCM 16-bit WAV audio —perfect for professional editing, mixing, and mastering.

Universal Compatibility

WAV is supported by virtually every audio editor, DAW, and media player on all platforms.

Instant Conversion

No waiting for server processing. Your MP3 is decoded and converted to WAV right in your browser.

Frequently Asked Questions

Is my MP3 file uploaded to a server?

No. All conversion happens 100% in your browser using the Web Audio API. Your file never leaves your device, ensuring complete privacy and security.

What quality is the WAV output?

The output is uncompressed PCM 16-bit WAV at the original sample rate of your MP3 file. No quality is lost during the conversion process.

Why are WAV files so much larger than MP3?

WAV stores raw uncompressed audio data, while MP3 uses lossy compression. A typical MP3 is about 10% the size of its WAV equivalent. The trade-off is perfect audio fidelity.