Free Online Video Converter
Convert between MP4, WebM, MOV, AVI, MKV, and more — with full control over codecs, resolution, and audio.
Different platforms want different video formats. Edit on a Mac in MOV, post to the web in MP4 or WebM, archive in MKV. Media Manipulator handles every common video container and codec in one place, with full control over bitrate, resolution, and audio.
How to use it
Upload video
Drop in any common video container.
Pick target format
MP4, WebM, MOV, AVI, MKV.
Tune codec and quality
Bitrate, resolution, audio.
Download
Save the converted video.
What this tool does
- Converts between MP4, WebM, MOV, AVI, MKV, FLV, WMV, and ProRes.
- Choose codec (H.264, H.265, VP9, ProRes, DNxHD).
- Resize, change frame rate, trim, and re-encode audio.
- Apply filters and color grading optionally.
Why it matters
- Editing apps, browsers, and social platforms each prefer different formats.
- Smaller video files improve page-load time and bandwidth costs.
- Re-encoding lets you fix wrong codecs or unplayable files.
Common use cases
MOV → MP4
Make Apple-shot footage playable everywhere.
AVI → MP4
Modernize an old archive video.
MP4 → WebM
Shrink web video for modern browsers.
Editor handoffs
Export ProRes or DNxHD for high-quality editing.
Advanced details
- H.264 in MP4 is the safe-everywhere default.
- H.265 (HEVC) and VP9 give ~25–50% smaller files at the same visual quality, but need a modern player.
- For editing handoffs, ProRes (in MOV) or DNxHD (in MOV/MXF) preserve the most quality.
Why Media Manipulator
- Full control over codec, bitrate, and audio in one upload.
- AI transcription available on the same file.
- Free, no signup, no watermarks.
Privacy & file handling
Your uploads are processed on our own servers and are designed to be automatically deleted within 24 hours. We do not share your files with third-party AI providers, and AI features run on a local GPU server we operate. No login or account is required.
Frequently asked questions
What output format is best?
MP4 with H.264 for compatibility, WebM with VP9 for the smallest web files.
Can I trim before converting?
Yes — the trim section of the form lets you cut the clip down before re-encoding.
Will my audio stay in sync?
Yes — FFmpeg keeps A/V sync. If you change frame rate or speed, audio is resampled accordingly.
Is there a file-size limit?
Very large files may be rejected on the free tier. Try lowering the resolution first.