FLV to VOX Converter

Separate audio from FLV and export as VOX online

Drop files here. 1 GB maximum file size or Sign Up
to
Facebook Amazon Microsoft Tesla Nestle Walmart L'Oreal

Simple Workflow

Three steps — upload, choose format, download. No technical knowledge needed. The clean interface makes conversion straightforward for everyone.

Fast Processing

FLV to VOX conversion happens on cloud servers at speed. Extract audio from video and download the VOX result in moments.

Any Device Works

Use the converter on Windows, macOS, Linux, iOS, or Android. It runs in any modern browser regardless of your operating system or device.

How to convert FLV to VOX

1

Select files from Computer, Google Drive, Dropbox, URL or by dragging it on the page.

2

Choose vox or any other format you need as a result (more than 200 formats supported)

3

Let the file convert and you can download your vox file right afterwards

About formats

FLV (Flash Video) is a container format originally developed by Macromedia and later maintained by Adobe Systems after the 2005 acquisition. The format gained support for standalone playback with Flash Player 7 in 2003 and quickly became the dominant video format on the web, powering platforms like YouTube, Hulu, and Vimeo during the late 2000s. FLV files typically contain video encoded with the Sorenson Spark or VP6 codec alongside MP3 or ADPCM audio, wrapped in a lightweight proprietary container optimized for streaming delivery. The major strength of FLV was its ability to deliver consistent video playback across different operating systems and browsers through the ubiquitous Flash Player plugin, solving the fragmentation problem that plagued web video at the time. FLV files begin with a compact header followed by tagged data packets, a structure that enables fast seeking and efficient progressive download. The container supports embedded metadata with cue points, enabling interactive features like chapter navigation and timed events. FLV transformed online video from an unreliable niche experience into a mainstream medium, fundamentally reshaping entertainment, education, and communication on the internet. Although HTML5 video and modern codecs have replaced Flash-based delivery, FLV files remain in countless archives and legacy systems.
Developer: Adobe Systems
Initial release: 2003
VOX is a headerless audio format built around Dialogic ADPCM encoding, widely adopted in telephony, interactive voice response (IVR) systems, and voice mail platforms since the 1980s. Each audio sample is compressed into 4 bits using an algorithm developed by Oki Electric and implemented in hardware on Dialogic Corporation's telephony interface cards. VOX files typically use a sampling rate of 6000 or 8000 Hz, producing extremely compact recordings optimized for speech intelligibility rather than musical fidelity. Because the format carries no header, playback software must know the sample rate and encoding parameters in advance — a trade-off that reduces overhead but demands careful file management. The primary advantage of VOX is storage efficiency: a one-minute voice recording at 8 kHz occupies roughly 240 KB, making it practical for systems storing thousands of prompts. Dialogic ADPCM conforms to the ITU-T G.726 standard, ensuring interoperability across telephony equipment from different vendors. Even as modern call centers migrate to IP-based systems with codecs like Opus), vast libraries of VOX recordings persist in legacy IVR deployments and compliance archives worldwide.
Initial release: 1983

Frequently Asked Questions

What is the benefit of converting FLV to VOX?

VOX targets a particular set of hardware or software systems. Extracting VOX from FLV ensures your audio is ready for those specialized environments.

How can I open VOX files?

VOX opens in telephony systems, IVR platforms, and SoX for desktop playback.

Can I convert FLV to VOX on my phone?

Absolutely. The converter runs entirely in your mobile browser on iOS or Android — upload FLV, pick VOX, and save the output to your device.

Will the entire audio track be extracted?

All audio from the FLV source is captured in the VOX output. The conversion preserves the full duration of the original soundtrack.

Does converting FLV to VOX lose quality?

Some quality loss is normal with lossy compression, but at adequate settings the difference from the original FLV audio is barely noticeable.

Do I need to install anything?

The converter is completely web-based. No software, no plugins — just open convertio.tools in any modern browser and convert FLV to VOX directly.

FLV to VOX Quality Rating

4.3 (3 votes)
You need to convert and download at least 1 file to provide feedback!