Video Tools

Online video compression, conversion, and subtitle extraction

Reduce video size, convert common containers, or extract an existing subtitle track as SRT. Video and subtitle tasks run in your browser with FFmpeg WebAssembly, so performance depends on device memory and processing power.

3 focused toolsBrowser-based processing

Choose your next step

Video Tools in this toolbox

Check formats and file limits before uploading

Video Compression

Compress videos with adjustable quality, bitrate, and resolution

Input formats: MP4, AVI, MOV, MKV, WEBM

File limit: 50 MB · up to 2

Single-thread FFmpeg WASM in your browser

Video Format Conversion

Convert videos between MP4, AVI, MOV, MKV, WebM, FLV, WMV, and more

Input formats: MP4, AVI, MOV, MKV, WEBM, FLV, WMV

File limit: 50 MB · up to 2

Single-thread FFmpeg WASM in your browser

Subtitle Extraction

Extract existing embedded subtitle tracks; speech transcription is not included

Input formats: MP4, AVI, MOV, MKV, WEBM

File limit: 50 MB · up to 2

Single-thread FFmpeg WASM in your browser

Choose the video operation that matches the source

Use video compression when an upload or message has a file-size limit. Use video conversion when a player, editing tool, or publishing platform needs another container such as MP4 or WebM. Re-encoding may change both picture quality and file size; a new extension alone does not guarantee compatibility.

Subtitle Extraction can export subtitle tracks already embedded in a video. It cannot create captions from spoken audio. If no subtitle track is present, use a transcription workflow instead of repeatedly trying to extract one.

Organized around real tasks

Common video workflows

Prepare an upload

Compress a short clip and review the output size and quality before replacing the original.

Fix a format mismatch

Convert a supported source when the destination requires a different video container.

Reuse embedded subtitles

Extract an existing subtitle stream and save it as a separate subtitle file when the source contains one.

Before processing a video

  1. Check the source

    Confirm the extension, file size, and whether the video contains the track you need.

  2. Choose a focused tool

    Compress for smaller delivery, convert for container compatibility, or extract subtitles for an existing text track.

  3. Keep the original

    Compare playback, quality, and subtitle timing before using the new file elsewhere.

Video tool questions

Will video conversion preserve the original quality?

Not necessarily. Many conversions re-encode the video, which can change quality, size, codec, or playback compatibility. Keep the source until you have checked the result.

Can subtitle extraction create subtitles from speech?

No. It extracts an existing subtitle track. Speech-to-text transcription is a separate capability and is not part of this tool.

Why should I use a short video first?

A short sample lets you check quality and format compatibility before a longer job. Browser processing uses device memory, so begin with a small clip if your device has limited resources.

Should I compress or convert a video?

Compress when the file is too large. Convert when the destination rejects the current container. Conversion alone may not reduce file size.