What Is Letterboxing in Film? Definition, Examples, Uses

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Published: November 11, 2025 | Last Updated: November 14, 2025

Letterboxing vs. Pillarboxing vs. Windowboxing

While “letterboxing” has become the umbrella term, there are actually three types of “boxing” describe different screen formatting effects. Let’s see the difference between Letterboxing vs. Pillarboxing, vs. Windowboxing, using Wes Anderson’s The Grand Budapest Hotel (2014) as an example:

Letterboxing: Black bars appear on the top and bottom of the screen when widescreen content is displayed on a narrower screen.

Here’s a link to an article about adding black bars to your film, including templates you can use for various widescreen formats.

Pillarboxing: Black bars appear on the left and right when 4:3 content is displayed on a 16:9 screen.

Windowboxing: Black bars appear on all four sides when letterboxed content is shown inside a pillarboxed frame.

Windowboxing sometimes happens by mistake when a pillarboxed video is displayed on a screen that also adds letterboxing. It shrinks the image and surrounds it with black bars on all sides, as seen in older transfers or improperly formatted content.

History of Letterboxing

Letterboxing became common in the 1980s and 1990s when filmmakers began transferring widescreen movies to older TVs, which used a square 4:3 format. Instead of cropping the image, letterboxing kept the full width intact by adding black bars above and below the picture.

This solved a major problem with pan-and-scan, a method that cut off parts of the frame to fit the screen. Pan-and-scan often removes up to half of the original image, changing what the director framed and how scenes flowed visually. Letterboxing avoided this problem by preserving the original width.

The name “letterbox” comes from the shape of the image. The black bars create a narrow, wide slot that looks like a mail slot or letterbox opening.

Technical Details

Aspect ratio numbers describe the width compared to the height. A 2.39:1 image is more than twice as wide as it is tall. A 1.85:1 image is slightly wider than 16:9 (which is about 1.78:1). That’s why both require letterboxing on standard screens.

Ultra-widescreen formats like 2.76:1 will always have visible black bars on a 16:9 display. Even on modern TVs, letterboxing is needed to avoid cropping.

Letterboxing can reduce the visible image height, which slightly lowers the effective resolution. The image is scaled down to fit the screen’s width, and the remaining space is filled with black bars.

Compared to pan-and-scan, letterboxing is the preferred method because it keeps the director’s original framing intact. Cropping the sides can remove important visual information, such as supporting characters, architecture, or background movement that helps tell the story visually.

Modern Uses of Letterboxing

Letterboxing isn’t just a technical fix. It’s often used as a stylistic choice in editing. Music videos, trailers, and YouTube creators sometimes add letterbox bars to mimic the widescreen look of major films.

Streaming platforms now switch between aspect ratios during playback. For example, in Oppenheimer (2023, Universal), some scenes fill the entire screen when shown in IMAX, while others are letterboxed to match the 2.20:1 or 2.39:1 formats used for non-IMAX shots. This creates a noticeable shift between formats that matches what viewers saw in theaters.

This approach keeps the composition, camera movement, and framing exactly as they were designed to be seen.

Summing Up

Letterboxing is a way to preserve the full widescreen frame when a film is shown on a narrower display. It keeps the original aspect ratio intact and avoids cropping. Whether it’s maintaining the director’s original framing or creating a widescreen look during editing, letterboxing helps you see the film the way it was designed. If you’re watching a movie with black bars, you’re seeing more, not less.