Aparar Vídeos Online Grátis – Cortar e Converter HD

Open the tool in your browser and click the Open file button to pick a video (MP4, WEBM, MOV, MKV, AVI, etc.). Drag the start and end handles on the timeline, preview the selection in the player, then click Trim — the UI shows a progress bar and a Download button when encoding finishes. By default the tool exports the same container and common codec (e.g., MP4 H.264/AAC); if you want a different output choose Convert before Export. No signup or upload is required—the processing happens in your browser tab.

Yes — Video Trimmer Online Free runs entirely in your browser, so there’s no desktop installer and no account creation. You click Open file, edit, then Export/Download; exported files have no watermark and the page does not send your video to a remote server by default. Note that because processing is local, very large files can hit browser memory limits (Chrome desktop comfortably handles files up to ~500 MB on a typical modern PC; Safari on iPhone often struggles above ~100–150 MB).

Inputs supported include MP4 (.mp4), WEBM (.webm), MOV (.mov), MKV (.mkv), AVI (.avi) and M4V (.m4v) — playback depends on the codecs inside those containers. Output options in the Convert dropdown include MP4 (H.264/AAC), WEBM (VP9/Opus), MOV (H.264/AAC) and short GIF export for clips under ~30 seconds. HEVC/ProRes MOV files may not decode in all browsers; if your MOV uses HEVC and Safari fails, convert it in a desktop tool first or use Chrome/Firefox on desktop for better codec support.

Click Open file, then choose the Crop tool next to Trim; you can drag the crop rectangle or pick a preset aspect ratio (16:9, 1:1, 9:16) and enter exact pixel values in the Width/Height boxes. Press Apply crop to preview, then Export — cropping always re-encodes the clip so the process takes longer than a simple trim. If you need a specific output resolution pick a resolution preset in Convert (e.g., 1920x1080, 1280x720) to avoid letterboxing or upscaling artifacts.

The tool offers quality presets (Keep original, High / 1080p, Medium / 720p, Low / 480p) and a bitrate slider in the Convert view; lower bitrate and resolution reduce file size at the cost of image quality. For example, a 10-minute 1080p H.264 video at 8 Mbps (~600 MB) trimmed to 1 minute at the same bitrate becomes roughly 60 MB, while switching to 2 Mbps would reduce the 1-minute clip to ~15 MB but show compression. Be aware that re-encoding always introduces some quality loss; choose Keep original when you want minimal recompression.

Common causes are insufficient browser memory, corrupt container headers, or unsupported codecs (e.g., ProRes/HEVC in browsers that lack decoders). Fixes: try Chrome/Firefox on desktop rather than mobile Safari, close other tabs to free RAM, use a smaller input (split with a desktop tool), or open a different file to confirm codec support. If the file is valid but very large (>1 GB), use HandBrake or FFmpeg on your machine — the web tool is intended for single-file quick edits within browser memory limits.

No — exported videos from Video Trimmer Online Free are not watermarked and the service does not require payment or signup for basic trimming and conversion. The practical limits are browser-driven: file size and CPU time; you may encounter slow encodes for long 4K clips or heavy conversions (VP9) because the encode runs in JavaScript/WebAssembly in your tab. Concurrency is limited to what the browser and your CPU can handle; there’s no enforced upload quota since processing is local.

Yes, you can open MOV (.mov) and WEBM (.webm) files — but success depends on embedded codecs. MOV containers with H.264/AAC work well and can be trimmed or converted to MP4; MOV files that use HEVC or ProRes may fail to decode in some browsers. WebM with VP8/VP9 is best edited in Chrome and Firefox (Safari lacks WebM playback), so use those browsers for WebM editing; if playback fails, convert the file on desktop (HandBrake) into an MP4 H.264 first.

By default the in-browser trim snaps to the nearest keyframe unless you enable the Re-encode entire clip toggle (found under Advanced or Convert), which forces a full re-encode and allows frame-accurate cuts but increases processing time. If you need lossless, frame-accurate cuts without re-encoding, use ffmpeg on desktop with a command like ffmpeg -i input.mp4 -ss 00:01:23 -to 00:02:34 -c copy output.mp4; that preserves quality but requires installation. The browser tool is convenient for quick edits; for precise professional cuts, desktop tools remain better.

Open your MOV file with Open file, then open the Convert dropdown and select MP4 (H.264) or the target container, pick the resolution preset 1920x1080 (1080p) and choose a bitrate preset. Click Export — the tool shows an encoding progress bar and a final Download button when complete. Conversion in-browser can be CPU-intensive and will be slower for 4K sources; for large batches or hardware-accelerated encodes use HandBrake or your GPU-accelerated desktop converter.

Desktop Chrome or Firefox generally offers the best experience because they provide more memory and better codec support; you can comfortably edit files up to ~500 MB depending on your machine. Mobile browsers (iOS Safari, Android Chrome) can open files from the Photos library, but iOS often uses HEVC for videos which some web codecs can’t decode, and backgrounding the app can stop processing. For anything over ~200 MB, long clips, or more stable downloads, use a desktop browser.

Use this tool when you need a quick, single-file trim, crop or simple conversion without installing software — no signup, no watermark, and everything runs in-browser. For batch jobs, lossless stream copies, advanced filters, precise bitrate ladders, or handling >1 GB files, desktop apps like HandBrake (GUI) or FFmpeg (command line) are faster and more reliable. Also, for frame-accurate, lossless cuts or professional color workflows, FFmpeg or dedicated NLEs are the better choice.