NEW · FFmpeg.wasm · 100% Browser-Based

Free Video Reverser

Play videos backward with optional reversed or muted audio. Frame-perfect reverse via FFmpeg.wasm in your browser. No upload, no signup, no watermark.

🎬
Drop a video file
MP4 · MOV · WebM · MKV · AVI · GIF
Files stay on your device · Never uploaded

Why Do This in Your Browser?

Reversing video — playing it backward — is a classic creative effect. Magic tricks, comic surprise moments, satisfying time-rewind shots: all of them depend on a clean reverse. Until recently, this meant a desktop editor and a few minutes of menu hunting; online tools either capped length, watermarked output, or uploaded your video.

This tool reverses video and (optionally) audio in browser. The FFmpeg `reverse` filter buffers the entire decoded video in memory, then writes frames out in reverse order; the `areverse` filter does the same for audio. Output is a clean MP4 — no watermark, no upload, no signup.

How It Works

Reversing video isn't a streaming operation — every frame has to be decoded and held in memory before writing them in reverse. That puts a practical cap on length: longer videos need more RAM. Most laptops handle 5-minute 1080p reverses comfortably; longer than that, you'll hit memory pressure. For very long clips, reverse in sections and merge.

Audio options matter for the final effect. Reversed audio produces the iconic 'backward' sound (often used for surreal or supernatural effects). Muted audio is more practical for sight-gag reversal where the soundtrack would be distracting. Forward audio over reversed video creates an uncanny mismatch sometimes used in music videos.

Tip: Reverse a specific segment by trimming it first, then reversing the trimmed clip. Pair reverse with the Speed Changer for slow-motion rewind effects.

Common Use Cases

Magic Trick Reversal
Drop an object → catch it. Spilled coffee → unspilled. Classic reverse-effect comedy.
Cinematic Rewind Shot
Time-rewind cuts where the action runs backward and meets the start at the cut point.
Skateboard / Dance Move Analysis
Watch a complex move in reverse to understand the entry and exit positions.
Music Video Effect
Reverse a section of dance footage for visual interest.
Educational Demonstration
Show a process forward, then reverse it to illustrate reversibility (chemistry mixing, etc.).
Surreal / Glitch Aesthetic
Reversed footage with reversed audio is a staple of horror and surreal video art.

How We Compare

Honest read on free, paid, and self-hosted options for this kind of job:

UDT Video Reverser (this tool): Free, browser-based, optional reversed/muted audio. No upload, no watermark.
Clideo Reverse: Free tier watermarks. $9/mo. Cloud.
Kapwing Reverse: Free 4-min cap + watermark. $16/mo. Cloud.
Ezgif Video Reverse: Free with caps. Ad-supported. Cloud.
Premiere Speed/Duration Reverse: Industry-standard, instant — requires Premiere subscription. Best for long-form footage where browser memory is a constraint.
FFmpeg reverse + areverse: Free, runs locally — same operation. CLI required. This tool wraps it for one-off use.

Frequently Asked Questions

What's the maximum video length I can reverse?
Roughly 5 minutes of 1080p on a modern laptop, 2–3 minutes on a phone. Reversing requires holding all decoded frames in memory at once, so length is bounded by available RAM. For longer videos, reverse in sections and merge.
Are my videos uploaded anywhere?
No. The entire reverse runs in your browser via FFmpeg.wasm. The 32MB engine downloads once and caches.
How long does the reverse take?
Roughly 2–3x real-time — a 1-minute clip takes 2–3 minutes to reverse on a modern laptop. The bottleneck is decoding every frame, holding it in memory, then re-encoding in reverse order.
Will quality drop?
Slight loss from the re-encode at CRF 23 — visually identical to source for most content. The reverse itself is bit-exact frame-by-frame; only the final encode is lossy.
Can I reverse only part of the video?
Not directly — trim the section you want first, then reverse. For mid-video reverse sections within otherwise-forward footage, use a proper NLE.
What does the audio sound like reversed?
Words become unintelligible 'backward speech' (a staple of surreal soundtracks). Music has reversed envelope shapes and reversed reverb tails — the iconic 'backward guitar' effect of the late '60s. Modern pop music sometimes uses reverse audio for transition swells.
Can I keep audio in original direction while reversing video?
Yes — toggle audio to 'forward'. The result is forward audio playing over reversed video, an uncanny mismatch sometimes used in music videos for emphasis.
Will it work with vertical phone videos?
Yes — orientation is preserved through the reverse. Whatever aspect ratio goes in, comes out reversed but otherwise unchanged.

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