Free Online FLV to MP3 Converter
Convert FLV to MP3 — Extract Audio from Flash Era Videos
FLV had its golden age from about 2005 to 2012. If you downloaded YouTube videos before they switched to MP4, saved Newgrounds animations, archived streaming content, or recorded your screen with early versions of Camtasia or OBS, there is a solid chance those files are sitting in FLV format on an old hard drive somewhere. Flash Player is long dead, and most modern video players either refuse to open FLV files or handle them poorly. But the audio trapped inside those files — music, commentary, lectures, interviews — is often still worth keeping. This FLV to MP3 converter extracts that audio and gives you a clean MP3. Drop in your FLV file, extract audio from FLV, and get something that actually plays on a modern device. No software to install, works right in the browser.
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Supports images, audio, and video files
Where FLV Files Come From (and Why the Audio Inside Still Matters)
FLV is a dead format walking, but the content inside is not. Here is why people still need to convert FLV to MP3 in 2026.
Old YouTube Downloads from the Pre-MP4 Era
Remember KeepVid? SaveVid? Those Firefox download extensions? Before YouTube switched to MP4 around 2010, every download tool saved videos as FLV. If you were a teenager archiving music videos, tutorials, or comedy sketches from early YouTube, those files are FLV. The video quality is probably terrible by today's standards, but the audio might be exactly what you are looking for. Convert FLV to MP3 and rescue the soundtrack.
Training Videos and E-Learning Content
Corporate training departments and universities pumped out enormous amounts of FLV content in the late 2000s. Flash-based LMS platforms like older Moodle setups, Adobe Connect recordings, and early webinar tools all defaulted to FLV. If your company or school still has an archive of these recordings and you just need the narration or lecture audio, converting FLV to MP3 is the fastest way to get it.
Internet Archive and Wayback Machine Content
The Internet Archive hosts millions of FLV files from the Flash era of the web. Archived news clips, early web series, Flash animations, historical recordings — a lot of it is only available in FLV. If you have downloaded FLV files from the Wayback Machine and want to extract the audio, this converter handles them without any issues.
Built to Handle a Dead Format's Quirks
FLV files are not all the same inside. Different eras and different tools produced FLV files with different audio codecs, bitrates, and encoding quirks. This converter was built to deal with all of it.
Reads FLV Containers with MP3, AAC, Speex, or Nellymoser Audio
The FLV container format supported several audio codecs over its lifetime. Early FLV files (2005-2008) usually contain MP3 audio. Later ones switched to AAC. Some Flash-based voice chat and screen recording tools used Speex or Nellymoser, which are obscure codecs you will not find anywhere else. This FLV to MP3 converter reads all of these variants and produces a standard MP3 regardless of what is inside the FLV.
Converts Old YouTube Downloads Saved with Browser Plugins
Those FLV files you saved with KeepVid, Video DownloadHelper, or whatever browser extension you used back in 2008 — they still convert perfectly. The files might be 15 years old, but FLV is a well-defined format and the audio inside has not degraded. Change FLV to MP3 and that old music video or tutorial becomes a listenable audio file again.
Handles FLV from the Internet Archive and Wayback Machine
Downloaded an FLV file from archive.org and your media player will not touch it? That is exactly the situation this converter is designed for. Internet Archive FLV files come from all sorts of original sources with varying encoding settings, and the converter processes them all without choking.
Works When Flash Player Is Dead and VLC Shows Codec Errors
Flash Player has been uninstalled from every modern browser, and even VLC occasionally stumbles on certain FLV files — especially those with unusual audio codecs like Nellymoser. This converter does not rely on Flash Player or any external codec. It reads the raw FLV container directly and extracts the audio. If the file is not corrupted, it converts.
Processes Old Training and E-Learning FLV Content
Got a corporate archive full of Flash-based training videos from 2009? Those are almost certainly FLV files. Maybe the company needs the narration extracted for compliance records, or someone wants to reuse the content in a modern LMS. Converting those FLV files to MP3 gives you clean audio files that any current system can work with.
Converts Flash Screen Recordings and Webinar Captures
Early screen recording tools like Camtasia (pre-version 8), older OBS builds, and various Flash-based capture tools saved output as FLV. Webinar platforms like older Adobe Connect and GoToMeeting also stored recordings in FLV format. If you need the audio from those old captures — presenter narration, Q&A sessions, meeting discussions — this FLV to MP3 converter pulls it out cleanly.
How to Convert FLV to MP3
Extracting audio from Flash era videos takes about thirty seconds. Here is the process.
Add Your FLV Files
Open videotoaudio.net in any browser. Drag your .flv files onto the page, or browse to select them from wherever you have them stored. Found a whole folder of old Flash downloads? Add them all at once — the converter handles batches.
Choose Your MP3 Quality
MP3 is already selected as the output. Pick a bitrate: 128 kbps is fine for speech-heavy content like lectures and webinar narration, 192 kbps works well for general use, and 320 kbps is the way to go if the original FLV had decent audio quality you want to preserve.
Download the Extracted Audio
Hit convert and the FLV to MP3 extraction finishes in seconds — the converter strips the video track and only processes the audio, so it is fast. Save your MP3s individually or grab the batch as a ZIP. That audio is now free from its obsolete Flash container.
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FLV to MP3 — Frequently Asked Questions
What is FLV and why do I have files in this format?
FLV stands for Flash Video. It was THE video format of the early web, used by YouTube (2005-2010), Dailymotion, Newgrounds, Hulu's early days, and basically every website that played video through Adobe Flash Player. If you downloaded web videos during that era, saved streaming content, or used Flash-based screen recorders, you almost certainly have FLV files. The format is completely obsolete now, but the files still exist on millions of hard drives.
Flash Player is dead — can I still convert FLV files?
Yes. You do not need Flash Player to convert FLV to MP3. Flash Player was needed to play FLV in a web browser, but the FLV file format itself is just a container holding video and audio data. This converter reads the container directly and extracts the audio without needing Flash or any plugin. Flash being dead is exactly why tools like this exist.
I downloaded YouTube videos as FLV back in 2009 — will they still convert?
Almost certainly, yes. FLV files do not degrade over time — if the file is not corrupted (you can check by seeing if its file size seems reasonable), the audio inside is exactly as it was when you saved it. Drop the file in, convert FLV to MP3, and you will get the same audio that was playing when you originally downloaded the video. Those early YouTube FLV files typically contain MP3 or AAC audio internally.
Can I convert FLV files from old Adobe Connect or GoToMeeting recordings?
Yes. Both Adobe Connect and older versions of GoToMeeting stored their recorded sessions as FLV files. These recordings usually have narration, meeting dialogue, and sometimes presentation audio. The converter extracts all of that audio into a single MP3. This is especially useful for companies sitting on archives of old meeting recordings they need to reference but can no longer play in their original format.
FLV vs F4V — what's the difference?
Both are Adobe video formats, but they are structurally different. FLV (Flash Video) is the older format based on a proprietary container. F4V came later and is actually based on the MP4/ISO container format — think of it as Adobe's branded version of MP4. F4V files are generally easier for modern players to handle because they are so close to MP4. This converter is designed for FLV files specifically, though many F4V files will also work since the audio extraction process is similar.
My FLV file plays video but has no sound — what's going on?
Some FLV files were created without an audio track at all — this was common with certain screen capture tools that recorded video only. Another possibility is that the FLV uses the Nellymoser or Speex audio codec, which some players cannot decode even when the track exists. Try converting with this tool first — if there is an audio track in there, the converter will find it and produce an MP3. If the conversion produces a silent or very short MP3, the original FLV likely had no audio to begin with.
Can I convert SWF (Flash) files to MP3, or only FLV?
This converter is built for FLV files. SWF is a completely different format — it is an interactive Flash application (games, animations, interactive content) rather than a video file. SWF files can contain audio, but extracting it requires decompiling the SWF, which is a fundamentally different process. For SWF audio extraction, you would need a dedicated SWF decompiler tool. For FLV to MP3, this converter does the job.
The audio in my FLV sounds tinny and compressed — will MP3 make it worse?
If the audio in your FLV file already sounds compressed, that is because it was encoded at a low bitrate originally. Early web videos often used 64 kbps or even lower audio to keep file sizes down for dial-up and early broadband connections. Converting to MP3 will not fix that original compression, but it also will not make it noticeably worse. Set the MP3 bitrate to 128 kbps or above and the re-encoding overhead is minimal. What you hear in the FLV is roughly what you will hear in the MP3.
Are there any modern uses for FLV, or is it completely obsolete?
FLV is effectively dead for new content. Some legacy RTMP streaming setups still use FLV internally, but even those are being replaced by HLS and DASH. No modern browser, phone, or media player is designed around FLV support anymore. If you are creating new content, use MP4. If you have old FLV files with audio worth saving, convert FLV to MP3 and move on. There is no reason to keep content in FLV format in 2026.
Can I convert FLV files from an old Newgrounds download?
If the download is a standalone FLV video file, yes — drop it into the converter and extract the audio as MP3. Many Newgrounds downloads from the Flash era were saved as FLV. However, some Newgrounds content was distributed as SWF files (interactive Flash applications), which are a different format and need a different tool. If your file ends in .flv, this converter will handle it. If it ends in .swf, you will need an SWF decompiler to get at the audio.