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Transform your videos with our powerful API. Trim, convert, add subtitles, overlay watermarks, and more. Simple pricing, powerful features.

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Guide

How to Trim a Video Online

Remove unwanted seconds from the start or end in minutes.

Step-by-step

  1. Open the video trimmer and upload a file or paste a URL.
  2. Set start and end times in HH:MM:SS format.
  3. Submit the job and download the trimmed MP4 output.

When trimming is the best option

Trimming is ideal when you need to remove a short intro, outro, or dead space. It is fast, preserves quality, and produces a clean clip for sharing or conversion.

If your goal is to cut a single segment from the start or end, trimming is the fastest path. For multiple clips, repeat the trim workflow for each segment.

  • Great for removing silence or dead space.
  • Fast for simple start and end cuts.
  • Use MP4 output for maximum compatibility.

Set accurate timestamps

The trimmer uses HH:MM:SS timestamps for start and end. Start by marking a slightly wider range, then tighten the times to match the exact clip you want.

If you are working from a script or transcript, convert timestamps to the same HH:MM:SS format to avoid mistakes.

  • Use leading zeros (00:01:30).
  • Double-check start and end order.
  • Trim shorter clips for faster processing.

Keyframe behavior

Fast trims align to keyframes for speed. That can shift the cut slightly in either direction. If you need frame-perfect precision, re-encoding is the best approach.

  • Adjust timestamps slightly if the cut is off.
  • Trim shorter segments for faster processing.
  • Keep the original in case you need a different cut later.
Video trimmer tool with start and end times filled in
Example trim settings with start and end timestamps.

Quality and file size

Trimming does not usually change quality because it keeps the original encoding. This means you get a clean clip without re-encoding artifacts.

File size is proportional to duration. A shorter clip is smaller, which helps when sharing or sending through chat tools.

  • Use MP4 for the widest compatibility.
  • Shorter duration means smaller files.
  • Keep the original if you need to revise.

Trim vs cut vs convert

Trimming removes time from the start and end. Cutting usually means extracting a clip from the middle, which you can also do by setting start and end times.

Converting changes the file format or size. If you need a different format after trimming, run a conversion step on the trimmed output.

  • Trim for start and end removal.
  • Cut for a specific middle segment.
  • Convert for format or size changes.

Troubleshooting

If the cut feels early or late, adjust the timestamps by a second or two to land on a better keyframe. This is common with compressed video.

If the output fails, re-encode the source to a standard MP4 and try again. Unusual codecs can cause issues with trimming.

Formats and limits

The browser tool supports MP4 and WebM inputs and outputs MP4. Anonymous usage is rate limited, and authenticated accounts use available credits.

If you work with other formats, convert them to MP4 first for the smoothest trimming experience.

Common mistakes to avoid

The most common mistake is swapping start and end times. Always confirm that the start time is earlier than the end time.

Another frequent issue is choosing a clip that is too long for the intended use. Shorter trims are easier to share and review.

  • Check HH:MM:SS formatting.
  • Avoid very long clips when you only need a highlight.
  • Keep a copy of the original file.

Quick checklist

Run through this list before you submit the job to save time.

  • Start and end times are correct.
  • Input is MP4 or WebM.
  • Clip length matches the intended use.
  • You are ready to download the output.

Use the API for scale

The API supports the same trim parameters. Submit start and end times, then retrieve the output URL when the job completes. This is useful for batch processing or product workflows.

  • POST /video/trim with start and end.
  • GET /jobs/:id for status and output.
  • Store outputs in your own storage for long-term access.

Try the tool

Trim the beginning and end of a video with clean, fast exports.

Open Video Trimmer OnlineView API docs

API option

Use POST /video/trim and GET /jobs/:id to automate trimming.