Convert MOV to FLV Online Free

Convert QuickTime MOV files to FLV for Flash-based video platforms and legacy streaming systems. ChangeThisFile uses FFmpeg on secure servers to deliver fast, high-quality conversion with no software required.

By ChangeThisFile Team · Last updated: March 2026

Quick Answer

ChangeThisFile converts QuickTime to FLV using FFmpeg, a professional-grade multimedia framework, to transcode QuickTime files to FLV format with optimized codec settings and quality preservation. Free with no signup required. Files are encrypted during transfer and automatically deleted from our servers after conversion.

Free No signup required Encrypted transfer · Auto-deleted Under 2 minutes Updated March 2026

Convert QuickTime to FLV

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Drag & drop your .mov file here, or click to browse

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QuickTime vs FLV: Format Comparison

Key differences between the two formats

FeatureMOV (QuickTime)FLV
Full NameQuickTime MovieFlash Video
DeveloperAppleAdobe Systems
ContainerQuickTime ContainerFlash Video Container
Video CodecH.264, H.265, ProResH.263, VP6, H.264
Audio CodecAAC, PCM, MP3MP3, AAC, Nellymoser
PlatformApple ecosystem (Mac, iOS)Flash Player / legacy web
EditingNative in iMovie, Final CutLimited modern support
File SizeLarger (high quality)Compact for streaming

When to Convert

Common scenarios where this conversion is useful

Flash Video Platform Upload

Convert Mac-produced QuickTime MOV files to FLV format for uploading to legacy video platforms or CMS tools that require Flash Video input.

Legacy Streaming Server Delivery

Prepare MOV content as FLV files for delivery through older RTMP-based streaming servers or Flash Media Server workflows.

Cross-Platform Video Archive

Convert Apple QuickTime recordings to FLV to maintain a consistent format within Flash-era video libraries.

Older E-Learning Systems

Export MOV lecture or training videos as FLV for upload to e-learning platforms built on Flash-based video players.

Web Embed Compatibility

Convert MOV files to FLV for embedding in legacy HTML pages or Flash-based website video players that predate HTML5 video.

Who Uses This Conversion

Tailored guidance for different workflows

Content Creators

  • Convert QuickTime footage to FLV for uploading to YouTube, TikTok, or social media platforms
  • Transform QuickTime screen recordings to FLV for sharing in blog posts or tutorials
Choose FLV at 1080p or higher for the best quality-to-size ratio on social platforms
Preview the converted FLV file before uploading to ensure audio sync is maintained

Video Editors

  • Convert QuickTime raw footage to FLV for importing into editing software like Premiere or DaVinci Resolve
  • Transform QuickTime project exports to FLV for client delivery or final distribution
Maintain the original resolution and frame rate during QuickTime to FLV conversion to avoid quality loss
Use a high bitrate when converting to FLV if the footage will undergo further editing

Social Media Managers

  • Convert QuickTime brand videos to FLV to meet platform-specific format requirements
  • Transform QuickTime ad creatives to FLV for cross-platform publishing campaigns
Check each platform's recommended FLV specs (resolution, bitrate, duration) before uploading
Keep the QuickTime original archived for future re-exports at different resolutions

How to Convert QuickTime to FLV

  1. 1

    Upload Your MOV File

    Click to select or drag and drop your QuickTime MOV video. The file is transmitted to our servers using encrypted HTTPS for privacy and security.

  2. 2

    FFmpeg Converts MOV to FLV

    Our server-side FFmpeg process encodes the MOV video to an FLV container with H.264 video and AAC audio for maximum compatibility with Flash-based players.

  3. 3

    Download Your FLV

    Download the converted FLV as soon as processing is done. Your original MOV file is permanently deleted from our servers right after.

Frequently Asked Questions

FLV (Flash Video) is needed for legacy Flash-based platforms, older video players, and RTMP streaming workflows. While Flash is deprecated, many archival and enterprise systems still use FLV.

FLV with H.264 encoding delivers good quality, though MOV files (especially ProRes) are often higher quality. Expect some quality reduction due to the compression change.

MOV and MP4 share similar codec support but use different container structures. MOV is Apple's proprietary container and is optimized for the Apple ecosystem.

VLC Media Player, Windows Media Player with codecs, and many other modern players support FLV playback without requiring Adobe Flash Player.

Yes. FFmpeg transcodes both the video and audio streams. The audio is re-encoded as AAC in the FLV container.

Files up to 25MB (free tier; 500MB on Pro) are supported. For larger MOV files, compress or trim the video first before uploading to ChangeThisFile.

Yes, your uploaded MOV and the resulting FLV are both automatically removed from our servers after you download the converted file.

Yes. MOV files from Final Cut Pro, iMovie, or any QuickTime-compatible export are supported. Make sure the file is within the 50MB size limit.

Yes, FFmpeg preserves the source frame rate during conversion unless the source rate exceeds FLV container limits.

Yes. ChangeThisFile is completely free, with no accounts, subscriptions, or hidden fees.

Related Conversions

→ QuickTime to MP4 → MP4 to FLV → FLV to MP4 → QuickTime to AVI → QuickTime to WebM → FLV to QuickTime

Related Tools

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Need to convert programmatically?

Use the ChangeThisFile API to convert QuickTime to FLV in your app. No rate limits, up to 500MB files, simple REST endpoint.

View API Docs
Read our guides on file formats and conversion

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