Compress Large Video Files
Have a large video file you need to shrink? This tool handles files up to several gigabytes — all processed locally in your browser.
Powered by ffmpeg.wasm - runs entirely in your browser
Large file considerations
Files over 500MB work on most desktop browsers but require patience. A 1GB video may take 20-40 minutes. The processing time depends on your CPU speed, chosen quality settings, and video length.
How to Get Started
Key Features
Large file support
Handles files up to ~2GB on desktop browsers.
Progress tracking
Real-time progress bar and elapsed time so you know how long is left.
Cancel anytime
Cancel button stops processing immediately if you change settings.
No size limits imposed
No artificial limits — only your browser's memory limits apply.
Frequently Asked Questions
What is the maximum file size I can compress?
No hard limit is imposed. Desktop browsers typically handle up to 2GB reliably. Beyond that, browser memory may run out.
My browser crashed on a large file — what can I do?
Try lowering the resolution setting (e.g., 720p) to reduce memory usage. Also ensure you have enough free RAM (at least 4GB free).
Can I compress a 4-hour recording?
Very long recordings (4+ hours) will likely exceed browser memory limits. Consider splitting the video first using a tool like ffmpeg desktop.
Does my device need to stay on?
Yes. Keep your device powered and the browser tab active for the entire processing duration.
Related
Ready to compress your large video?
Go to the Video Compressor →