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Letterbox
Add cinematic black bars to any video. Choose popular aspect ratios like 2.35:1 Cinemascope or 21:9 ultrawide.
Letterboxing adds horizontal black bars above and below a video (or image) so it plays in a wider cinematic aspect ratio such as 2.35:1 Cinemascope, 2.39:1, or 21:9 without cropping the picture. EditClips.online adds letterbox bars free in your browser: drop a video or image, pick the ratio preset, choose the bar color (black by default), click Process, and download the result — no upload, no watermark.
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Original
Cinematic 2.35:1
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Max 100 MB
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100% private — files never leave your device
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Free — no sign up, no watermark
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How to Use Letterbox
Upload a video or image
Select the cinematic aspect ratio
Choose bar color (black by default)
Click Process and download
Features
Add cinematic black bars for widescreen look
Multiple aspect ratio presets — 2.35:1, 2.39:1, 21:9
Custom bar color
Works with video and images
Frequently Asked Questions
What is letterboxing?
Letterboxing adds horizontal bars to the top and bottom of a video to simulate a wider cinematic aspect ratio, like 2.35:1 used in movies.
What aspect ratio should I use?
2.35:1 (Cinemascope) is the most common cinematic ratio. 2.39:1 is used in modern Hollywood films. 21:9 matches ultrawide monitors.
Will this change my video resolution?
No. The bars are drawn over the existing frame, keeping the original resolution. The visible image area within the bars has the cinematic ratio.
