Convert
Cut video clips without uploading them
Cut a section out of a video by start and end time, losslessly and instantly, without any upload.
For the best results: Cuts snap to the nearest keyframe (usually within a second or two of what you asked for) because the trim copies the stream losslessly instead of re-encoding. Trim slightly wide if the exact frame matters.
Converted entirely in your browser, your files are never uploaded. Very large files depend on your device's memory.
What is Video Trimmer?
Video Trimmer is a free file converter that cuts a section out of a video between the start and end times you set, using lossless stream copying so the result is ready in seconds. The video is processed by an ffmpeg engine running inside your browser, so your footage is never uploaded anywhere. There is no queue and no watermark, and after the first load it keeps working without a connection.
- ✦Runs entirely in your browser. Nothing you enter is ever uploaded
- ✦No account, no sign-up, and no data leaves your device
- ✦Works offline once the page has loaded
See it in action
Only the 1.0s to 2.5s stretch of a clip is needed for a bug report.
What you drop in
clip.mp4, start 1, end 2.5
What you get
clip-trimmed.mp4 of about 1.7 seconds: the cut snaps to the nearest keyframe before your start point, which testing measured precisely (a 1 to 2.5s request produced a 1.67s file).
Tip: Fast mode is a lossless stream copy, instant and quality-perfect, but it can only cut where the video has keyframes; switch Cut precision to Frame-accurate when the exact moment matters more than speed, it re-encodes and lands on the frame. Swapping start and end gets a friendly correction rather than a cryptic failure. One caveat from testing: browser-recorded WebMs often lack a seek index, re-encode those first with the Video Converter.
Use cases
What people use it for
Cut the first fumbling minute off a webinar recording before circulating it to the team.
Extract a single goal from an entire junior football match video for the club newsletter.
Trim the accidental extra footage from the end of a phone recording before archiving it.
Who uses Video Trimmer?
Corporate trainers
cut lengthy session recordings into the segments that matter before loading them into the learning system
Sporting parents
clip their child's best moments from full match videos to share with grandparents interstate
Content creators
top and tail raw takes quickly before pulling the tidied clips into a proper editing timeline
How it works
- 1Choose your files. They open in your browser, not on a server.
- 2Your device converts, compresses, or resizes them locally, with no upload.
- 3The converted files download straight back; nothing is kept anywhere.
Tips for the best results
- Note your timestamps while watching in a normal player, then convert minutes to plain seconds.
- Leave a small buffer around the moment you want, since cuts snap to the nearest keyframe.
- Always cut fresh clips from the original file rather than from an earlier trim.
- Use this before any re-encoding tool, because trimming first means less footage to process later.
- If a cut lands oddly, shift the start a second and simply run it again.
FAQ
Frequently asked questions
Why is trimming instant when converting takes minutes?
Because nothing is re-encoded. The trimmer uses stream copy, meaning ffmpeg reads the compressed video and audio between your two timestamps and writes them into a fresh file untouched. No frames are decoded or recompressed, so a two-hour recording trims about as quickly as a two-minute one, and the kept footage is bit-for-bit identical to the original.
Why does my cut land slightly away from the second I entered?
Compressed video stores complete pictures, called keyframes, only every so often; the frames between them merely describe changes from their neighbors. A group of these dependent frames cannot start a file, because they would reference pictures that no longer exist. A lossless cut therefore snaps to the nearest keyframe, which can shift your chosen point by a moment either way.
Does trimming reduce the video quality at all?
Not in the slightest, and this is the trimmer's quiet superpower. Since the surviving footage is copied rather than re-encoded, it carries exactly the pixels and sound of the original with no generational loss. You can trim, check, and trim again from the source as many times as you like without the quality ever moving.
Do my recordings stay on my own device while trimming?
Completely. The cut happens inside your browser using ffmpeg compiled to WebAssembly, so the file is read into local memory, sliced, and downloaded again without a byte crossing the network. Board meetings, medical consultations, and family moments are trimmed with the same privacy as if you had never opened a website at all.
How do I enter the start and end points?
Both fields take plain seconds counted from the beginning of the file, so a highlight starting at 3:20 is entered as 200. Watch the video in any player first and note the timestamps you want, then translate minutes into seconds before typing them in. Everything between the two values is kept and the rest is dropped.
How do I cut a video without losing quality?
Use a stream-copy trim like this one, which slices the compressed data directly instead of re-encoding it. The output holds the identical pixels the camera produced. The one compromise is precision, since lossless cuts land on keyframes rather than exact frames, so allow a second or two of margin around important moments.
Can I trim a video that is several hours long?
Usually, and faster than you would expect, because stream copy takes similar time whether the recording runs two minutes or two hours. The real ceiling is memory: the file is processed locally in the browser, so an enormous recording can strain an older phone. A computer handles marathon files far more comfortably.
Why does my trimmed video start with a frozen frame?
That points to a cut landing mid-way through a keyframe interval in an unusual file. Nudge the start time a second or two earlier and trim again, which costs nothing since the operation is instant and your source is untouched. Files from phones and screen recorders almost always cut cleanly.
Are there any usage limits?
None. Everything is generated locally in your browser, so there is no server cost, no metering, and no daily cap, use it as many times as you like, completely free.
Also useful
Related free tools
More Convert tools
