Brighten Video (Brightness & Contrast)
Brighten a dark video, fix contrast and saturation or make it black & white — with a live preview, free and private
100% private. Your file is processed locally in your browser with WebAssembly — it is never uploaded to a server, stored, or seen by anyone.
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Brighten Video adjusts three things that make or break a clip: brightness (lift a dark, underexposed recording), contrast (add punch or soften harsh light) and saturation (make colours pop, tone them down, or set to zero for a black-and-white look). Move the sliders and the preview updates live; presets give you a one-click Brighten, Black & white or Vivid.
The final render applies FFmpeg's eq filter to every frame locally with ffmpeg.wasm and encodes to H.264 MP4 — no upload, no signup, no watermark. Audio is copied unchanged. Note that brightening cannot recover detail that was never captured: a badly underexposed clip will get lighter but also noisier.
Why use this tool
Live preview
See the effect on your own frame before rendering.
Three controls that matter
Brightness, contrast and saturation cover most fixes without a full editor.
Presets
Brighten, Black & white and Vivid in one click.
Private
Rendered with ffmpeg.wasm in your browser; nothing is uploaded.
How to use the Brighten Video (Brightness & Contrast)
Upload the video
Drag and drop or click to choose a clip; the first frame appears in the preview.
Adjust or pick a preset
Move Brightness, Contrast and Saturation, or click Brighten / Black & white / Vivid.
Apply and download
Click Apply, wait for the local render and save the MP4.
Popular use cases
- Lifting a dark phone video shot indoors or at night.
- Converting a clip to black and white for a dramatic look.
- Boosting saturation on a flat, grey overcast recording.
- Reducing contrast on a harsh, over-lit screen recording of a webcam.