Convert FLV to MP4

Flash video. Modern MP4.

On-device. Instantly.

Drop your video here

or tap to browse

No upload
Works offline
No idea what's in your videos

Need to convert many FLV files? The offline bundle handles batch conversion. $49 once.

Get Bundle →
// How it works

Three steps. Zero uploads.

01
Drop
Drop your FLV file.
02
Convert
fwip converts Flash Video to H.264 MP4 in your browser.
03
Download
Download the MP4. Works on every modern device and platform.
// Why this is different

Convert legacy Flash video without uploading it.

FLV (Flash Video) is a legacy format from the Flash era — unsupported by all modern browsers and devices. fwip converts to MP4 entirely in your browser using ffmpeg WebAssembly. Your old recordings and archives stay private.

fwip works differently. The processing engine runs entirely in your browser. Your FLV is read from your device, processed on your CPU, and the result is saved back to your device. No server is involved. We literally cannot see your file.

No server processing

Everything runs on your device using WebAssembly. Your file never touches a network.

No account required

Drop a file. Get a result. No sign-up, no email, no password.

No subscription

Free in the browser. $99 once for the offline bundle. That's it. Forever.

Works offline

The desktop version works with no internet connection at all.

Use it free in your browser. Own it offline for $15. Convert any legacy video, anywhere.
// How fwip compares

fwip vs the rest.

fwipCloudConvertKapwingHandBrake
Upload requiredNoYesYesNo (desktop)
Account requiredNoFree tierYesNo
Price$15 / toolFree (25/day) / $9/mo ($108/yr)Free / $24/mo ($288/yr)Free (open source)
Files leave deviceNeverYesYesNo
Works offlineYesNoNoYes
Batch processingOffline bundleYesYesYes
// Questions

Frequently asked.

How do I convert FLV to MP4?▾
Drop your FLV file into fwip. It converts to H.264 MP4 in your browser. Download the result.
Is my FLV file uploaded?▾
No. Conversion runs entirely in your browser using ffmpeg WebAssembly. Your file never leaves your device.
What is FLV format?▾
FLV (Flash Video) was the dominant online video format in the 2000s, used by YouTube and other platforms before HTML5. Adobe Flash is now unsupported, making FLV files unplayable on modern systems.
Will quality be preserved?▾
fwip re-encodes at high quality settings. Most FLV files contain older codecs (Sorenson Spark, VP6) — converting to H.264 MP4 gives you a modern, widely-compatible format at similar or better visual quality.
Can I convert FLV to other formats?▾
This tool outputs MP4. For other output formats, use the general Video Converter tool which supports multiple output options.
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Like it? Own it.

Offline. No browser. No internet. No excuses.
$15
This tool
  • FLV to MP4 · offline
  • Batch processing
  • No file size limit
  • 3 devices · one payment
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$49
Video bundle
  • All video tools · offline
  • Batch processing
  • No file size limit
  • 3 devices · one payment
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$99
Complete suite
  • All 200+ tools · offline
  • No file size limit
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One-time payment · 3 devices · Updates included · Mac + Windows + Linux