Pad Video Online Free

Pad video is useful when the source frame is correct, but the destination canvas is not. A horizontal product demo may need to appear in a square social feed. A vertical phone clip may need to sit inside a widescreen help article. A screen recording may include menu text, cursor movement, or a dialog that would be ruined by cropping. Choose a local video, let the browser read the source dimensions, then select the target aspect ratio. The tool calculates a new even-sized canvas, centers the original frame, adds padding around it, and exports an H.264 MP4 with optional AAC audio.

1. 1

   Choose the source video

   Pick an MP4, MOV, WebM, phone clip, screen recording, or other video your browser can read. The preview shows the original frame size so you can confirm that padding is the right approach.

2. 2

   Choose canvas ratio and padding color

   Select 1:1, 16:9, 9:16, or 4:5. The original video is centered and remains uncropped. Then choose a simple padding color that fits the destination.

3. 3

   Export and review the padded MP4

   Run the conversion and keep the tab open while FFmpeg works. When the result appears, check the edges, subject position, text size, audio, and final aspect ratio before downloading.

Cropping changes composition by removing pixels. That can be perfect for a close product shot, but it can also cut off a face, cursor, caption, slide title, dashboard metric, chart label, or interface panel. Padding solves a different problem: the whole source frame stays visible while the output canvas changes shape. For documentation teams, support teams, teachers, marketers, and product builders, that distinction matters. A screen recording often contains small details at the edges. A tutorial may rely on the full context of the window. A product video may need to prove that nothing outside the central subject was hidden.

This pad video workflow is intentionally practical. It does not create a designed motion graphic or a blurred background duplicate. It creates a clean, centered, padded MP4 with common aspect ratios and predictable colors. That makes it useful before uploading to social platforms, embedding a video in a CMS, attaching a file to a support case, placing a clip in a slide deck, or preparing a visual asset for a fixed-layout page. Because the work runs in browser FFmpeg, you can make that layout correction before sharing the original file with another service.

The most important setting is canvas aspect. Choose 1:1 for square feeds and thumbnails, 16:9 for standard web video, 9:16 for vertical mobile placements, and 4:5 for portrait social formats. Padding color controls the visible area added outside the original frame. CRF controls output quality and file size; lower values look sharper but produce larger files. The encoding preset controls speed. Audio can be kept as AAC when the source sound helps the viewer understand the clip, or removed when the padded file should be silent.

Preview the output in the same orientation where it will be used. Padding keeps all source pixels, but it also makes the original picture occupy less of the final canvas when the aspect ratio changes a lot. Check whether small text is still readable, faces are not too small, and the padding color does not fight the page or platform background. If the subject becomes too small, crop video may be a better choice, or you may need a designed layout with background fill and captions.

• Choose the aspect ratio that matches the destination before exporting, because changing it later means another encode.
• Use black padding for neutral video players, white for documents and slide decks, and gray or blue only when it fits the brand or background.
• Preview the result at the final display size to make sure text, faces, and screen UI are still large enough after padding.

The selected file is processed by FFmpeg in your browser. The normal workflow does not require uploading the original to a remote converter, creating an account, or keeping a server-side job history. That is helpful for product drafts, client demos, classroom material, private phone clips, and internal screen recordings that only need a canvas adjustment before use.

Padding does not hide sensitive content. In fact, it preserves the entire original frame, so everything visible in the source remains visible in the padded MP4. If the source includes names, emails, customer data, private browser tabs, faces, addresses, license plates, or internal dashboards, remove or mask that content before sharing. Use crop only when the sensitive area is outside the needed frame; use a dedicated blur or redaction workflow when sensitive details are inside the frame.

Use a full editor when the padding needs a blurred video background, a branded frame, animated graphics, captions, logos, a moving crop, multiple clips, or separate layouts for different scenes. Browser FFmpeg is a good fit for one source video and one clean canvas conversion, but long 4K files can still be slow or memory-heavy. For important work, test a short clip first, confirm the canvas ratio, then process the final source.

• You need a moving background, blurred duplicate fill, animated layouts, overlays, captions, or multiple clips on a designed timeline.
• The subject should fill the frame and losing outer pixels is acceptable; crop video may look stronger than padding in that case.