Online Video Editor

Install & offline

Preparing offline access. Stay connected until it is ready.

After the first online visit finishes caching, you can open the home page and every tool offline, edit local videos and download results. The online music library needs an internet connection; local music works offline. Format support still depends on your browser’s codecs.

The cache stores app resources, not videos, music, logo images or exports. Closing or reloading clears current files and results. If site data is cleared or the browser removes the cache, reconnect to prepare offline access again.

You can also use Install app or Add to Home Screen in your browser menu. On iPhone / iPad, use Safari’s Share menu → Add to Home Screen. If installation is unavailable, you can still use the site in your browser.

All tools
BROWSER VIDEO TOOLS

Compress video files

Adjust quality, resolution and output format
Processed in your browser.

Videos are processed in your browser and never uploaded.
Free to useBatch processingNo registration

How to compress video files

  1. 01

    Select files

    Select or drop one or more videos.

  2. 02

    Choose quality and output format

    Choose higher quality, balanced or smaller size; keep the original resolution or limit it to 1080p or 720p. Select a codec and container supported by your device. Defaults are balanced quality, original resolution, H.264 and MP4.

  3. 03

    Download results

    Download each result, or save the batch as a ZIP.

Common questions

How do the quality settings control size?

Higher quality, balanced and smaller file target 80%, 60% and 40% of each source video's average bitrate. Processing reads the full primary video track to measure this rate, excluding audio and container overhead. Lower resolutions reduce the target further in proportion to the pixel count. These are video bitrate targets, not file-size ratios.

Will the compressed video always be smaller?

Not always. The encoder's actual output can differ from the bitrate target, and audio tracks and container overhead also take up space. Compatible original audio tracks are copied. Results show the original and exported sizes; if the file did not shrink, try a smaller-size setting or lower resolution. Compression can reduce picture quality; lossless results, fixed reduction ratios and exact file sizes are not guaranteed.

Which codecs and containers can I choose?

H.264, H.265, VP9 and AV1 availability depends on your device's actual encoding support. MP4 supports these four choices, MOV supports H.264 or H.265, and WebM supports VP9 or AV1. All original audio tracks are retained; if that is not possible, the file reports an error and the batch continues. Your target player also needs to support the selected video and audio codecs.

Can I compress an MKV that cannot play in the preview?

You can try. Compression does not depend on video preview playback: the file must be readable, its source video decodable, and the selected output encodable. The 500 MiB per-file limit still applies; no extra video is transcoded for preview.

Are my videos uploaded?

No. Videos are processed in your browser without registration. Reloading or closing the page clears your current files and results.

Which formats and file sizes are supported?

Readable containers include MP4, MOV, WebM and MKV; processing depends on your browser and device's support for the file's codecs. The limit is 500 MiB per file and 1 GiB of source files per batch. Process large files in smaller batches.

Mute a video

How to use

  1. Select videos

    Select or drop files. The limit is 500 MiB per file and 1 GiB per batch.

    The subtitle tool handles one video at a time and imports text, timing and line breaks from SRT, VTT or ASS, without the original styling or effects. Preview in sync, adjust a shared style and position, and shift subtitle timing. Export burns subtitles into the picture and preserves original audio.

  2. Choose a tool

    Choose mute, compression, text/logo watermark, stickers, music, cut, crop, canvas or speed for every video. Compression offers quality, resolution and output format controls; the final size is checked after export. Music supports volume, original audio mixing and looping. Text and logo watermarks cover the full video by default; drag the time range ends to change when they appear. Stickers have independent time ranges. Join combines the list in order; speed changes also change audio pitch.

  3. Process and download

    Start processing and follow each file's progress. Download results individually or as a ZIP. Changing settings requires processing again.

Videos are never uploaded. Reloading or closing the page clears files and results. Saved presets stay in this browser. Changing language keeps your current files.