Is this tool private?

Yes. All processing happens locally in your browser. No data is uploaded.

What extras does this tool have?

Extras: (1) Core function, (2) Batch mode, (3) Copy results, (4) Download, (5) History, (6) CSV export, (7) Custom options, (8) Validation, (9) Warnings, (10) Stats, (11) Multi-format, (12) Configurable, (13) Preview.

Audio Runs in your browser

Video Compression Guide

Guide for video compression: codec selection, CRF settings, resolution scaling. 100% private. 100% private.

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Codec

Resolution

FPS

Quality preset

Duration (seconds): 120

Audio bitrate: 128 kbps

Quick presets:

Compression plan

CodecH.264 (AVC) (libx264)

Resolution1080p Full HD (1920×1080)

QualityBalanced (default) — CRF 23, preset medium

Video bitrate3780 kbps

Audio bitrate128 kbps

Total bitrate3908 kbps

Estimated size55.90 MB

ffmpeg command

ffmpeg -i input.mp4 -c:v libx264 -preset medium -crf 23 -b:v 3780k -s 1920x1080 -r 30 -c:a aac -b:a 128k output.mp4

Codec comparison

H.264 (AVC)licensed

CRF 18–28 (default 23) · encoder libx264

H.265 (HEVC)licensed

CRF 20–30 (default 28) · encoder libx265

VP9royalty-free

CRF 20–35 (default 31) · encoder libvpx-vp9

AV1royalty-free

CRF 25–40 (default 32) · encoder libsvtav1

Quality presets

Archive / Visually losslessIndistinguishable from source.

CRF 18

High qualityExcellent quality, larger file.

CRF 20

Balanced (default)Recommended for most uses.

CRF 23

StreamingGood quality, smaller file for web.

CRF 26

Mobile / Low bandwidthSmaller file, reduced quality.

CRF 28

Smallest fileMaximum compression.

CRF 30

Resolution reference

Label	Dimensions	Megapixels	Use case
4K UHD	3840×2160	8.3	Cinema, premium displays
2K QHD	2560×1440	3.7	Premium streaming
1080p Full HD	1920×1080	2.1	Standard HD streaming
720p HD	1280×720	0.9	Web video, mobile
480p SD	854×480	0.4	Low-bandwidth mobile
360p	640×360	0.2	Thumbnails, previews

Guide for video compression: codec selection, CRF settings, resolution scaling. 100% private. 100% private. Everything runs locally in your browser — your data never leaves your device.

How to use

Enter your input in the tool above.
Adjust any options to your preference.
Use the Copy or Download buttons to save the result.
Everything happens locally — your data never leaves your browser.

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