Convert FLV to MP4 in Seconds

Got old FLV videos that nothing will play? Cacao Docs converts them to MP4 instantly — free, private, zero installs needed.

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1.5M users
17,150 reviews

How It Works

FLV to MP4 Converter — Convert FLV Flash Video Files to MP4 Online Free | Cacao Docs
1
Upload Your FLV. Drag your FLV file into Cacao Docs or click to browse. Old Flash videos, downloaded clips, archived recordings — any FLV works.
2
Cacao Docs Converts It. Our engine converts your FLV into a clean, modern MP4 in seconds. High quality, fast, no settings to fiddle with.
3
Download Your MP4. Grab your MP4 and play it anywhere — phone, laptop, Smart TV, or video editor. No more "format not supported" dead ends.

Your Complete Audio & Video Toolkit

Transcribe, convert, extract — everything audio & video, handled in one place.

AI Transcription

Speech to text with speaker labels, timestamps, and 95%+ accuracy.

Format Conversion

MP3, WAV, M4A, OGG, FLAC — convert any audio or video format instantly.

Video to Audio

Extract audio from MP4, YouTube, Zoom recordings, and more.

Lightning Fast

Most files processed in under three minutes. No waiting around.

No Signup
Start instantly
100% Secure
Auto-deleted
Browser-Based
No installs

People Love These Tools

Podcasters, researchers, marketers, and remote teams use our audio & video tools every day.

Feb 12
Saved years of old Flash videos
Had a hard drive full of FLV files from the early 2000s that nothing would open. Cacao Docs converted them all to MP4 and I can finally watch them again. Absolute legend of a tool.
Tobias RichterInstagram logo
Tobias Richter
Feb 2
YouTube finally accepted my uploads
Was trying to upload old FLV recordings to YouTube and kept getting rejected. Cacao Docs converted them to MP4 and they went through first try. Should've found this sooner.
Yuki TanakaInstagram logo
Yuki Tanaka
Jan 22
Fast, clean, no watermarks
Converted a batch of old FLV clips in one go. Cacao Docs was quick, the quality was solid, and there was no watermark or sign-up required. Exactly what I needed.
Nadia OseiInstagram logo
Nadia Osei
824 people converted files today
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Trusted and Secured by Industry Experts

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Why People Pick Our Audio & Video Tools

Rescue Your Old Flash Videos

Flash is dead and FLV files are basically unplayable on modern devices. Cacao Docs converts them to MP4 so those old videos aren't lost forever — just drag, drop, done.

Plays on Every Device Now

MP4 is the universal video standard — phones, browsers, Smart TVs, video editors, streaming platforms. Cacao Docs gets your FLV into that format instantly.

Upload to YouTube & Social

YouTube, Instagram, TikTok — none of them accept FLV. Cacao Docs converts your Flash videos to MP4 so you can upload them anywhere without format rejection.

Batch Convert Your Archive

Got a folder of old FLV files to rescue? Cacao Docs lets you queue them up and convert back to back. No repetitive uploading, no wasted time.

Transcribe the Audio After

Once you have your MP4, run it through Cacao Docs AI transcription to pull out subtitles, captions, or a full text transcript. One platform, full workflow.

Encrypted & Auto-Deleted

Your FLV is locked with encryption on upload and wiped from Cacao Docs servers the second conversion is done. Zero data stored, zero risk.

Rescue Your Old Flash Videos

Flash is dead and FLV files are basically unplayable on modern devices. Cacao Docs converts them to MP4 so those old videos aren't lost forever — just drag, drop, done.

Plays on Every Device Now

MP4 is the universal video standard — phones, browsers, Smart TVs, video editors, streaming platforms. Cacao Docs gets your FLV into that format instantly.

Upload to YouTube & Social

YouTube, Instagram, TikTok — none of them accept FLV. Cacao Docs converts your Flash videos to MP4 so you can upload them anywhere without format rejection.

Batch Convert Your Archive

Got a folder of old FLV files to rescue? Cacao Docs lets you queue them up and convert back to back. No repetitive uploading, no wasted time.

Transcribe the Audio After

Once you have your MP4, run it through Cacao Docs AI transcription to pull out subtitles, captions, or a full text transcript. One platform, full workflow.

Encrypted & Auto-Deleted

Your FLV is locked with encryption on upload and wiped from Cacao Docs servers the second conversion is done. Zero data stored, zero risk.

FLV to MP4 Online

No signup needed. Just pick a tool and go.

Convert FLV to MP4
4.6
1,340 reviews
4.5
13,920 reviews
4.6
4,550 reviews

Frequently Asked Questions

Quick answers about our audio & video transcription and conversion tools.

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FLV to MP4 Converter — Convert FLV Flash Video Files to MP4 Online Free | Cacao Docs - Cacao Docs