Opus to QCELP - Online Audio Converter

Convert Opus to QCELP online. Private, client-side - no uploadrequired. Batch conversion, quality presets, codec control.

Convert Opus to QCELP

[+] Drop Opus audio here or click to select Opus

Output format

QCELP (QCELP)

Mode[i]

Simple Advanced

Quality[i]

Sample Rate[i]

Channels[i]

About Opus to QCELP

Convert Opus to QCELP. Opus adapts from 6 kbps speech to 510 kbps music with low latency. QCELP compresses CDMA voice near 8 kbps like EVRC. Carrier variants differ; check headers before converting..

Why convert Opus to QCELP?

Smaller files with QCELP lossy compression.
Keep quality where supported.
Private, no upload - runs in your browser.

Opus vs QCELP

Codec	Opus	QCELP
Compression	lossy	lossy
Sample behavior	Quality set by bitrate	Quality set by bitrate
Typical use	Opus adapts from 6 kbps speech to 510 kbps music with low latency.	QCELP compresses CDMA voice near 8 kbps like EVRC.

When not to convert Opus to QCELP

Skip QCELP for archival masters: lossy compression discards detail, so keep the Opus original.
Keep a master copy: repeated exports stack small losses, so archive Opus before batch QCELP shares.

Limits

Starting point: Opus - Opus adapts from 6 kbps speech to 510 kbps music with low latency. CD-era hardware may not decode it; use MP3 for legacy players. Carrier variants differ; check headers before converting. Encode QCELP (QCELP) from Opus at 256k for music or 128k for speech, starting from the master.

How conversion works

Conversion runs entirely in your browser with FFmpeg WASM. Files never leave your device.

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FAQ

How do I convert Opus to QCELP?

Drop your Opus file onto this page, choose quality and codec settings, then click Convert. The result downloads as QCELP instantly. All processing runs in your browser.

What codec is used for QCELP?

The default codec for QCELP is QCELP. You can change audio parameters in Advanced mode.

How do you store my files?

We do not store any processed audio. All conversion happens entirely in your browser using FFmpeg WASM.