Free IT Tools & Resources
Free 3CX Audio Converter
Use our Free 3CX Audio file converter to convert any audio type to a 3CX ready format, free of use. Renders in your browser, completely private offline.
Drop your file
Any audio format - MP3, M4A, OGG, FLAC, or even a WAV that's the wrong spec.
We convert it instantly
Resampled to 3CX's exact requirement: WAV, mono, 8 kHz, 16-bit. All in your browser.
Upload to 3CX
Save the new .wav and upload it in 3CX → Admin → System Prompts (or your IVR/Queue).
Frequently Asked
Questions
Where do I upload the converted file in 3CX?
In the 3CX Admin Console, go to Admin → System Prompts for system-wide prompts, or open the specific IVR, Queue, or Voicemail you're configuring and use the upload field there. No further conversion is needed - the file is already in the correct format.
Why does 3CX require 8 kHz, mono, 16-bit WAV?
This is the standard format for traditional telephony audio. Phone calls themselves are sampled at 8 kHz, so a higher-quality file wouldn't actually sound any better on a call. The smaller file size also means faster prompt delivery and less storage on your PBX.
See the official 3CX requirements for the full spec.
See the official 3CX requirements for the full spec.
Are my files uploaded anywhere?
No. Conversion runs 100% inside your browser using the Web Audio API. Files are never sent to our servers, never seen by us, and never shared with anyone.
You can disconnect from the internet after the page loads and the converter will still work.
You can disconnect from the internet after the page loads and the converter will still work.
What audio formats can I convert from?
MP3, WAV, M4A, AAC, OGG, FLAC, Opus, WebM, and most other common formats your browser can read. If we encounter a less common format (AMR, WMA, certain AIFF variants), the converter automatically loads a more comprehensive engine - no action needed from you.
Can I convert multiple files at once?
Yes. Drop or select as many files as you like. Each gets its own row and converts in parallel. When they're all done, use Download all as ZIP to grab them in one click.
Is there a file size limit?
No hard limit. Because conversion happens locally in your browser, very large files (over ~500 MB) may slow your browser a little. Typical IVR or voicemail prompts (a few minutes long) convert in under a second.
Does it work on a phone or tablet?
Yes. Tap the drop zone, pick your audio file, and the converter does the rest. The new WAV downloads to your device's normal downloads folder.
Will it ruin the quality of my recording?
For voice prompts, no. 8 kHz mono is the telephony standard and is what your callers will hear regardless. For music or stereo content destined for telephony, expect the usual phone-call sound; this is a limitation of the 3CX format, not the converter.