CONVERT FLV → WMV (FLV to WMV)
Fast, secure FLV to WMV conversion. No registration required.
📈 Target Minimum File Size (Guaranteed ≥ KB)
Lossless JPEG Q100 + standard COM segment padding for government & exam portals
Tap to choose your file Drop files here or click to browse
Automatic format identification and lossless transcoding across 201+ formats.
Convert to:
Detecting available formats...
Target Max File Size:
Uploading...
Processing your file...
READY!
Download File
Your file is converted & verified! Unlock instant download:
One-time secure payment via Stripe (Apple Pay, Google Pay, Card). Zero recurring subscription.
🛡️ Verification Audit
- ✓
- ✓ sRGB Color Fidelity
- ✓
Continue with this converted file (0s zero re-upload):
Batch Conversion Ready!
Your file is converted & verified! Unlock instant download:
One-time secure payment via Stripe (Apple Pay, Google Pay, Card). Zero recurring subscription.
Need to convert larger files or bigger batches right now?
Unlock up to 1 GB & priority cloud queue with 1-click Stripe checkout (Apple Pay, Google Pay, Card):
HOW TO CONVERT FLV → WMV
Upload the FLV
Drop your FLV onto the uploader. Files up to 25 MB run on the free tier without registration; paid plans go up to 2 GB.
Stream-copy or re-encode
FFmpeg probes the codecs; if compatible, it stream-copies (no quality loss). Otherwise it transcodes at matching bitrate.
Download the WMV
Fetch the converted WMV as soon as it is ready. Both files auto-delete within two hours.
FLV (Flash Video) was built around the H.263 and later H.264 video codec paired with an MP3 or AAC audio track, all wrapped in Adobe's proprietary container. By 2020 every major browser had dropped Flash Player entirely, which means an FLV file that once played directly in a web embed now requires either a legacy media player or a third-party codec pack on Windows — and fails outright on macOS Monterey and later without additional software. WMV (Windows Media Video), built on the VC-1 codec inside a Microsoft ASF container, is natively decoded by Windows Media Player on every Windows release since XP and is still the container format expected by certain Windows-centric workflows: Windows Movie Maker imports, legacy corporate video archives, and some digital signage systems that still target the Windows Media stack. The practical reason someone converts FLV to WMV in 2024 is almost always backward compatibility with Windows-only tooling or a corporate intranet that mandated WMV for its media library years ago and has never been migrated.
Why convert FLV to WMV
Flash Player is dead at the browser level, and the FLV container carries no meaningful future support from any major platform. WMV, while also a legacy format, still has deep native integration in Windows: Windows Media Player needs no codec installation, Windows Media Center archives are indexed in WMV, and some enterprise video management systems (particularly older SharePoint media libraries) accept WMV but reject FLV. The conversion also makes sense when a receiving system reports "format not supported" on FLV but WMV plays without incident, which is common on managed corporate desktops where the IT department blocked third-party codec packs.
FLV vs WMV — Technical specifications
Side-by-side comparison of the technical details.
FLV
- MIME type
- video/x-flv
- Extensions
- .flv, .f4v
- Video codecs
- Sorenson Spark, VP6, H.264 (F4V)
- Audio codecs
- MP3, Nellymoser, AAC
- Status
- Deprecated since December 31, 2020
- MIME Type
- video/x-flv
- Extension
- .flv
- Category
- Video Files
- Full Name
- Flash Video
- Conversion Engine
- FFMPEG
WMV
- MIME type
- video/x-ms-wmv
- MIME Type
- video/x-ms-wmv
- Extension
- .wmv
- Category
- Video Files
- Full Name
- Windows Media Video
- Conversion Engine
- FFMPEG
- Container
- ASF (Advanced Systems Format)
- Codecs
- WMV 7/8/9, VC-1
- Audio
- WMA (usually)
| Specification | FLV | WMV |
|---|---|---|
| MIME type | video/x-flv | video/x-ms-wmv |
| Extensions | .flv, .f4v | — |
| Video codecs | Sorenson Spark, VP6, H.264 (F4V) | — |
| Audio codecs | MP3, Nellymoser, AAC | — |
| Status | Deprecated since December 31, 2020 | — |
| MIME Type | video/x-flv | video/x-ms-wmv |
| Extension | .flv | .wmv |
| Category | Video Files | Video Files |
| Full Name | Flash Video | Windows Media Video |
| Conversion Engine | FFMPEG | FFMPEG |
| Container | — | ASF (Advanced Systems Format) |
| Codecs | — | WMV 7/8/9, VC-1 |
| Audio | — | WMA (usually) |
FLV vs WMV — Strengths and limitations
What each format does best, and where it falls short.
FLV Strengths
- Low overhead — the container is extremely compact.
- Designed for streaming — progressive download and seeking work well.
- Decoded natively by Flash Player on every OS for 20 years.
Limitations
- Flash Player is dead — no modern browser can play FLV without conversion.
- Legacy codecs (Sorenson, VP6) are poorly supported in modern tooling.
- Hardware video decoders never added FLV support.
WMV Strengths
- Good quality-to-bitrate ratio for its era (early 2000s).
- Native Windows playback since 1999.
- Single-vendor tooling reliable inside the Microsoft ecosystem.
- VC-1 variant was Blu-ray certified.
Limitations
- Proprietary — poor Mac and Linux support.
- DRM variants broke the "owned content" promise when license servers retired.
- Overtaken by H.264/HEVC — no meaningful modern deployment.
Quality & Compatibility
FLV files using H.263 video suffer a generational quality loss when re-encoded to VC-1 (WMV): H.263 is already a lossy codec, so the transcoding introduces a second compression pass. FLV files that carry H.264 video lose less detail but still go through a full decode-and-re-encode cycle since WMV does not passthrough H.264 streams. Bit depth is 8-bit in both cases — neither format supports 10-bit or HDR. Neither container has a meaningful alpha-channel video track in practice, so transparency is a non-issue. Audio transcoding from MP3 or AAC (FLV) to WMA (the default audio codec in ASF/WMV) is also a lossy-to-lossy step. Embedded metadata such as creation date and author fields may not survive the container change, as the FLV metadata model (AMF key-value pairs) has no direct equivalent in the ASF header structure.
Tips for Best Results
- Keep your source FLV file after the conversion — the re-encoded WMV will always be a quality generation below the original, so the FLV is your reference master for any future re-encodes to other formats.
- If the FLV contains H.264 video (common in files recorded after 2010), set the output WMV bitrate to at least the source bitrate shown in the file info to minimize visible degradation during the second-generation encode.
- WMV files above roughly 2 GB can fail to play correctly in older Windows Media Player versions (pre-WMP 12) because the 32-bit file-offset limit in early ASF implementations is exceeded — keep individual output files under that threshold if the target system is Windows Vista or earlier.
Frequently Asked Questions
Only when it has to. If the codecs inside FLV (usually H.264 or H.265 for video, AAC for audio) are accepted by WMV, we stream-copy — the bytes are repackaged into the new container with zero re-encoding and no quality loss. When the source uses a codec the target does not support, we transcode at a matching bitrate to keep the visual quality close to the original.
With stream copy, expect the job to finish in seconds to tens of seconds regardless of video length — the work is mostly rewriting the container. Transcoding is slower (roughly real-time: a ten-minute clip takes about ten minutes) because every frame must be decoded and re-encoded. The progress bar shows which mode applies.
Yes. Resolution, frame rate, colour space and bit depth are preserved by default; stream copy is literally bit-identical on these parameters. If you explicitly pick a lower bitrate or a different codec in Advanced, the output is rebuilt to those settings, but the default is always "match the source".
Flash Video
Source formatFLV was the dominant web video format during the Flash era. While Flash is now deprecated, many legacy video files still exist in FLV format and need conversion to modern formats.
Windows Media Video
Target formatWMV is a Microsoft proprietary video format from the Windows Media framework. It was common in the early 2000s and still appears in corporate and legacy environments.
Going the other way? Convert WMV back to FLV with the same engine.
Common Use Cases
Share across platforms
Send WMV files to anyone without worrying about whether they have the right software for FLV.
Embed in documents
Drop WMV output into Word, Google Docs, PowerPoint, Notion or a website without conversion warnings.
Optimize size
WMV often produces smaller files than FLV for web, email and storage.
Archive & future-proof
Store in a widely-supported format that will still open on future operating systems without legacy plugins.
FLV vs WMV — Typical file sizes
Approximate file sizes for common scenarios.
- 10-min YouTube 2008-era video 40-80 MB
- 45-min TV show (FLV H.264) 200-500 MB
- 10-min clip (2 Mbps) 150 MB
- 45-min episode (3 Mbps) 1 GB
- 2-hour HD movie (VC-1) 4-8 GB
Working with 4K/8K Video or Files Over 100MB?
Web browsers impose strict RAM limits on media streams. For gigabyte 4K/8K footage, GPU-accelerated NVENC transcode, or batch subtitle muxing, dedicated desktop encoders deliver zero upload delays.
One-time payment with zero recurring commitment: convert files up to 1 GB, OCR, PDF/A, and .ZIP batches for 24 hours.
Full 7 days of unlimited conversions, up to 2 GB per file, 100% ad-free with zero subscription.
High-throughput enterprise pipeline for files up to 2,048 MB, 50-file batches, ISO PDF/A, and priority processing.
Uncapped 4K/8K multi-track transcoding with hardware NVENC, VideoToolbox, and AV1/HEVC pipelines.
10-bit color grading workflows, Apple ProRes mastering, and automated watch-folder queues.
Related comparisons
See these formats side by side to understand which fits your use case best.
Related Guides
WMV Format: Windows Media Video Explained — Codecs, DRM & Conversion
Everything about WMV files: how Windows Media Video works, ASF container, DRM protection, WMV versions (VC-1), and how to convert WMV to MP4 or AVI.
Read guide →FLV Files: Flash Video Format History, Codecs, and Conversion Guide
Complete guide to FLV (Flash Video) files — Sorenson/VP6/H.264 codecs, file structure, YouTube history, FFmpeg conversion to MP4/WebM, batch processing, and...
Read guide →WMV Format: Windows Media Video — Complete Guide and Conversion
What is WMV (Windows Media Video), when it is still used, how to play WMV on Mac and Linux, and how to convert WMV to MP4 or MKV.
Read guide →
</>
Embed this tool on your website or blog (Free)
▼
Add this converter to your site in 10 seconds
Help your visitors convert files directly from your documentation, CMS, or blog. Copy the lightweight HTML snippet below — zero dependencies, responsive, and 100% free.
Secure & Private Conversion
Your files are encrypted during transfer, processed in isolated containers, and automatically deleted within 60 minutes. We never read, share, or store your data.