Video speed changer
Adjust Video Speed Online
Slow down or speed up MP4, MOV, or WebM with clean audio sync and crisp visuals. Ideal for TikTok, Instagram Reels, YouTube Shorts, and quick recuts that need precise timing.
Adjust video speed online freeSlow motion and fast motion editorChange speed for TikTok, Reels, ShortsSpeed up MP4 without losing audio sync
Operation process
Follow these steps to change video speed online free while keeping audio and visual quality intact.
Step 1
Upload and choose mode
Drop an MP4, MOV, or WebM and pick a preset: slow motion, 2x speed, or custom speed change.
Step 2
Preview with synced audio
Hear your soundtrack time-stretched with pitch correction so narration and beats stay natural while you adjust speed.
Step 3
Export for every platform
Download a platform-ready MP4 that fits Shorts, Reels, or YouTube, with timing locked to your chosen playback speed.
Principle & pipeline
The speed engine retimes frames and audio together, preserving smooth motion and natural sound for slow motion or fast forward edits.
Frame-accurate retiming
Frames are duplicated or blended based on your multiplier, keeping motion steady while you adjust video speed online.
The renderer respects your aspect ratio and duration target, so the final export stays aligned with platform limits like 60s or 90s. No extra compression passes that could soften the image.
Audio time-stretch
Pitch correction keeps voices natural when slowing or speeding, avoiding chipmunk or robotic tones.
The audio pipeline locks to the new timeline so dialogue, music, and beats stay in sync. Preview before export to confirm timing for TikTok, Reels, or YouTube uploads.
Functional highlights
Built for creators, editors, and marketers who need a reliable speed changer with platform-ready exports.
Precise speed ramps
Dial in 0.25x slow motion to 4x fast forward with smooth interpolation—ideal for b-roll, tutorials, or highlights.
Audio-safe time stretch
Pitch correction keeps voices clear when you change video speed online, preventing chipmunk or muddy audio artifacts.
One-click presets
Common presets like 0.5x slow-mo and 2x speed-up help you publish quickly to TikTok, Instagram Reels, and Shorts.
Scene-consistent timing
Maintain frame pacing so motion stays smooth and transitions remain clean after speed adjustments.
Fast rendering
Optimized encoding keeps exports quick even for longer clips, so your speed change workflow stays snappy.
Precise duration control
Target an exact video length for ads or social limits—handy when fitting content under 60s or 90s caps.
FAQs
Answers to common questions on changing video speed online with synced audio and quality-safe exports.