Free Local Video & Audio Converter
Harness the power of your browser to convert massive media files instantly and privately without queues or limits.
Video Conversion
Effortlessly swap between container formats like MP4 and WEBM locally.
Audio Extraction
Pull the audio track out of any video file and save it as MP3, WAV, or OGG.
Powered by WebAssembly
Uses a compiled version of FFmpeg directly inside your browser for native speeds.
Zero Uploads
We never upload your massive video/audio files to a server—complete privacy.
Create GIFs
Upload a short video and instantly convert it to a looping GIF animation.
Instant Export
Once processed via your device's CPU, download the media instantly with no queues.
How to Transcode Media
Easily change video and audio formats.
Upload Media
Select a video or audio file. It stays securely on your device.
Pick Output
Choose your destination format (MP4, WEBM, MP3, WAV, OGG).
Convert Locally
Your browser does the heavy lifting to transcode the file.
Save File
Download the fully converted audio or video to your device.
Got Questions?
Here is some more info on how this all works behind the scenes.
Latest from Our Blog
Tips, guides, and insights on image optimization, web performance, and choosing the right formats for your projects.
Choosing the Right Image Format
A deep dive into PNG, JPEG, and WEBP formats and when to use each one for maximum quality and performance.
5 Tips for Optimizing Images
Learn how to reduce image file sizes without sacrificing quality for faster load times.
Image Formats & SEO
Discover the link between image optimization, page speed, and your search engine ranking.
Why I Built ConvertFree4U
Tired of subscriptions, paywalls, and slow uploads.
I got incredibly frustrated every time I just needed to quickly turn a WebP image into a PNG. Every tool I found either slammed me with a daily limit, demanded me to create an account, or—worst of all—forced me to upload my private photos to their random servers. So I built ConvertFree4U to solve my own problem using modern web technology where the processing happens right inside your browser. No middleman, no servers, no nonsense.
Truly Private
I literally do not own a server to store your files. Your browser does all the heavy lifting locally.
Actually Free
No "Pro" versions. Convert as many files as you want, as large as your device can handle.
Modern Under the Hood
Built with WASM and Web Workers so your browser can process files almost as fast as a native app.