Multi-track timeline
Video, image, text and audio tracks. Drag between tracks, trim from both ends, split at the playhead, ripple-delete, snap to edges, zoom in to single frames.
Edit video. Upload nothing.
A real multi-track video editor that runs entirely on your device. Cut, layer, add text and transitions, then export MP4 up to 4K with your own graphics card. Your footage never touches a server.
Works in Chrome, Edge and Safari on a laptop or desktop. Nothing to install, nothing to sign up for.
- 0files uploaded, ever
- $0no plans, no watermark
- 4KMP4 / WebM export
- ∞projects, saved on your device
Everything you need to cut a real video
Not a toy. A timeline editor that happens to live in a tab.
Text that moves
Titles, subtitles, lower thirds and captions: fonts, boxes, outlines, shadows, line wrapping and animations such as fade, pop, slide, blur and typewriter.
Transitions
Cross dissolve, fade through black, wipes, pushes, zoom, circle and blur between any two clips on a track. Adjustable length.
Color & filters
Brightness, contrast, saturation, hue, blur, grayscale and sepia per clip, previewed live and rendered identically in the export.
Speed, pitch kept
0.25× to 4× per clip. Audio is time-stretched instead of resampled, so voices stay natural in slow motion and time-lapses alike.
Picture in picture
Scale, move, rotate, crop and flip any layer directly on the preview. Canvases for YouTube, Reels, Shorts, TikTok, square and cinematic.
Hardware export
Frame-exact MP4 (H.264) or WebM (VP9) up to 4K, encoded by your GPU through WebCodecs and streamed straight to disk, with no file-size cap.
Saved on your device
Projects and media live in your browser's private storage. Close the tab, come back tomorrow, keep editing. Still nothing uploaded, no account needed.
How it works
Three steps, zero uploads
- 1
Drop your files
MP4, MOV, WebM, MKV, MP3, WAV, PNG, JPG… They are read by your browser and copied into its private storage, not to us.
- 2
Edit on the timeline
Trim, split, layer, add text and transitions, tune color and speed. Everything is previewed live and autosaved while you work.
- 3
Export with your GPU
Pick a resolution up to 4K and a format. Your graphics card encodes the file frame by frame while it streams to your disk.
Why this exists
Online editors charge for servers. Cinetrim has none.
Cloud editors render your video on their machines, so they need accounts, plans and watermarks to pay for it. Cinetrim renders on yours, which is faster, private and free.
| Cinetrim | Typical cloud editors* | |
|---|---|---|
| Price | Free, no plan | Free tier + paid plans |
| Account | None | Required |
| Your video is uploaded | Never, there is no server | Yes, processed in the cloud |
| Watermark | None | Often on free exports |
| Export limits | Only your disk space | Length / resolution by plan |
| Rendering | Your GPU, no queue | Shared servers, queues |
| Works offline | Yes, after the first visit | No |
* Based on the publicly described free tiers of popular browser-based editors (October 2026). Features and limits change; check each product for current details. Product names belong to their owners.
Privacy by architecture
We cannot see your video, because it never leaves your computer.
No server, no upload
Decoding, compositing and encoding use your browser's WebCodecs API. Unplug the network after the page loads and everything still works.
No cookies, no tracking
No analytics scripts, no advertising, no third-party requests while you edit. Fonts and libraries are served from this site.
Open components
Built on open web standards and open-source media libraries; licenses are listed on the legal notice page. Your exported file is yours.
FAQ
Questions people ask
Is it really free? What's the catch?
There is no catch. Rendering happens on your device, so there are no server costs to recover. No plans, no trial, no watermark. If Cinetrim saves you money, you can buy the author a coffee.
Where are my files? Can you see them?
Imported media and projects are kept in your browser's private storage (Origin Private File System and IndexedDB) on your own computer. Nothing is sent anywhere and we have no way to access it. Delete a project in the editor or clear the site's data in your browser to remove it.
Which formats can I import and export?
Import: MP4, WebM, MOV, MKV, M4V (H.264, HEVC, VP8, VP9, AV1, whichever your browser can decode), MP3, WAV, AAC, OGG, FLAC, PNG, JPG, WebP and GIF. Export: MP4 (H.264 + AAC) or WebM (VP9 + Opus), 720p to 4K, 24–60 fps.
Which browsers work?
Chrome, Edge and other Chromium browsers (version 102 or newer) and Safari 16.4 or newer, on a laptop or desktop. They provide the WebCodecs API needed for decoding and hardware encoding. Firefox support is partial for now.
Is there a length or size limit?
Only your disk space and memory. Exports stream straight to a file on your disk, so even long 4K renders do not need to fit in RAM. Very large imports are copied into browser storage, which may take a moment.
Can I use it for commercial work?
Yes. You keep all rights to your footage and exports. There are no license tiers.
Does it work on my phone?
Not yet. Editing on a timeline needs a mouse or trackpad and a wide screen, and mobile browsers limit memory and codecs. Use a laptop or desktop.
Your footage stays yours.
Open the editor, drop a clip and export in minutes, without creating an account.
Start editing, freeMore private tools from the same studio