How it works
- Select a supported video up to 150 MB and 15 minutes.
- Choose High quality, Balanced or Maximum compression.
- Run local compression and keep the tab open.
- Compare the real output and download it only if the trade-off is useful.
Practical example
Balanced limits wide video to at most 1280 pixels and uses H.264 CRF 28. Cifrivo reports the exact output size rather than promising a percentage before encoding.
Formula and explanation
High quality keeps source resolution and applies moderate compression. Balanced caps width at 1280 pixels; Maximum caps it near 854 pixels and uses stronger quantization. All presets create H.264 video with AAC audio in MP4.
Content determines compression. A noisy or already compressed source can shrink little and may even grow; the interface reports that outcome honestly. Resolution and sizes shown come from the actual files.
Video encoding is one of the heaviest browser tasks. Limits reduce crashes on typical devices, and cancellation terminates the current FFmpeg worker. For multi-gigabyte or long professional footage, native desktop software is more appropriate.