Runs in your browser
Trim, resize and convert video, right in your browser.
Cut the part you need, lower the resolution and export MP4 or WebM. Local files are processed on your device, and vertical clips for Reels, Shorts and TikTok are fully supported.
- No signup
- No watermark
- Local files stay on your device
Video editor
Drop your video here
or choose a file from your device
MP4, MOV, WebM and MKV · If your browser can play it, Clipvexa can edit itWhy Clipvexa
Private by design
Videos you open from your device are decoded, trimmed and encoded in your browser. There is no upload step and no account.
Fast, with no waiting room
Nothing is sent anywhere before you can start, so a short clip is ready in seconds instead of minutes.
Built for vertical video
Portrait clips keep their proportions. Choosing 720p on a 1080×1920 video gives 720×1280, never a squashed picture.
Honest about compatibility
Clipvexa tells you what your browser can really do, checks the file it produces and explains any limit instead of failing silently.
Pick the job
Every tool below opens the same editor, set up for one task.
Trim video
Trim a video online without uploading it: set the start and end, preview the cut and export MP4 or WebM. No signup, no watermark.
Resize video
Reduce a video's resolution to 720p or 480p in your browser, keeping its proportions. Works with vertical clips. No upload, no watermark.
Convert to MP4
Convert WebM, MOV or MKV to MP4 (H.264 + AAC) in your browser, with optional trim and resolution. Private, free, no watermark.
Convert to WebM
Convert MP4 or other video to WebM (VP9 + Opus) in your browser. Trim and resize in the same step. Private, free, no watermark.
Import from URL
Import a video from a direct https link, then trim, resize and export it. Learn what works, why CORS can block it, and why YouTube is not supported.
How it works
1. Open your video
Drop a file, choose one from your device, or import a direct link. Clipvexa reads the real content and tells you right away if it cannot use the file.
2. Choose the part
Move the handles, type the seconds, or mark start and end while the video plays. The preview stops at the end of your selection.
3. Export
Pick MP4 or WebM, a resolution and a quality. Clipvexa reopens the exported file to check its tracks and length before handing it over.
Your video is processed on your device
Local file: Clipvexa decodes and encodes the video with your browser's own video APIs (WebCodecs). The file is not uploaded to any server.
Import from a URL: your browser contacts the server that hosts the file to download it. After that, processing continues on your device.
Like any website, the server that delivers Clipvexa receives a normal request when you open a page. That never includes your local videos. Read the privacy policy.
- No media serverClipvexa has no endpoint that receives video. It only downloads what you point it to.
- Nothing is savedProjects are not stored between visits. Reloading the page clears everything.
- Analytics and ads only with your consentMeasurement and advertising cookies are off until you accept them, and you can change your mind at any time.
Real compatibility
Clipvexa does not claim to open every file. It depends on your browser being able to decode the source video and encode the output format. This is what this browser supports right now:
Checking what this browser supports…
| Source | Output | Tested in |
|---|---|---|
| MP4 H.264 + AAC (landscape, vertical 1080×1920, square) | MP4 H.264 + AAC | Chromium, Firefox, WebKit (Playwright) |
| MP4 H.264 without audio | MP4 H.264 | Chromium, Firefox, WebKit (Playwright) |
| WebM VP8 / VP9 + Opus | MP4 H.264 + AAC | Chromium, Firefox, WebKit (Playwright) |
| Any of the above | WebM VP9 + Opus | Where the browser can encode it (Chromium, Firefox, WebKit engine) |
Tests use synthetic clips. WebKit is tested with Playwright's engine, not an installed copy of Safari, and no physical devices were tested.
Guides
Short, practical answers to the questions people ask about video files.
Resolution for TikTok, Reels & Shorts
Vertical 9:16 at 1080×1920 is the standard for TikTok, Instagram Reels and YouTube Shorts. Learn the sizes, the pitfalls and how to prepare a clip.
MP4 vs WebM
MP4 and WebM are containers, not quality levels. Compare H.264 + AAC with VP9 + Opus, compatibility and when each one is the better choice.
Why a video won't play
A video file can be fine and still refuse to play. Learn how codecs, containers and damaged files cause it, and what you can try.
Frequently asked questions
Is my video uploaded to a server?
No. A file you open from your device is read and processed inside your browser. If you import from a URL, your browser downloads the video from the server that hosts it, and nothing is sent to Clipvexa.
Which formats can I open and export?
Clipvexa can open MP4, MOV, WebM and MKV when your browser can play and decode their codecs. It exports MP4 (H.264 + AAC) or WebM (VP9 + Opus), depending on what your browser can encode.
Is there a size limit?
In browsers that can save straight to a file (such as Chrome or Edge on desktop) the output is written in parts and there is no fixed limit. In other browsers the result is prepared in memory, so Clipvexa limits videos to 120 MB. Import from a URL is also limited to 120 MB.
Is my work saved if I reload?
No. Clipvexa does not store projects. Reloading or closing the tab discards everything, so export before you leave.
Why was my video exported without audio?
Only when the browser cannot decode the original audio or encode it in the output format. Clipvexa tells you when it happens instead of promising audio it cannot deliver.
Can I import a video from YouTube or TikTok?
No. Clipvexa only imports direct links to a video file, from servers that allow it. YouTube, TikTok, Instagram, Vimeo and similar services offer no authorized way to do this from a browser: download your own video from the platform and upload it here.
Is Clipvexa free?
Yes, it is free to use, with no signup and no watermark. The site may show ads, and only if you accept them.