Compress MP4 Video OnlineWebCodecs & FFmpeg WASM
Reduce MP4 file sizes by up to 90% using hardware-accelerated WebCodecs and multi-threaded FFmpeg.
WASM ACCELERATED
Drop any Video, Image, Audio, or PDF
100% In-Browser & Sovereign • Zero Cloud Egress
MP4MOVWEBPPNGJPGHEICPDFMP3WAVGIF
Quick One-Click Presets
ANALYZING MEDIA METADATA...
Unable to read this file
The file could not be parsed. It may be corrupted, password-protected, or in an unsupported format.
📁
filename.ext
DETECTING...0 MB
ACTIVE
Removes GPS coordinates, device serial numbers, camera model, and timestamps from JPEG/PNG headers before compression.
Zero device or location data leaves your browser
ENCODING PARAMETERS
CRF 23 // Balanced
16 (Archive / Lossless)23 (Default)36 (Max Compact)
Auto 2-Pass Bitrate
MB
⚠️Target size exceeds original file size.
Zero Server Uploads • Multi-Threaded In-Browser Engine
Optimal MP4 Video Compression Tips
ENGINE TIP
Use CRF 23 for optimal visual quality
ENGINE TIP
Downscale 4K to 1080p to cut file size by 70%
ENGINE TIP
Select 2-pass target size for strict file limits
Frequently Asked Questions
Will MP4 compression reduce quality?
Modern H.264 encoding removes redundant spatial and temporal data without noticeable quality degradation at CRF 20-23.