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Compress
Compress one or more videos
Try Compress Online
Real Browser Processing0 file(s) selected
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Result
Browser processing runs locally and exports WebM, GIF, PNG, WAV, or VTT. The desktop app supports more formats, larger files, and faster batch workflows.
Compress Video shrinks MP4s, screen recordings and other video files with H.264 re-encoding — for email attachments, uploads with size limits, and less disk use. It runs locally with the bundled ffmpeg; the video never leaves your device.
Three quality levels map to H.264 CRF values: Low = CRF 35 (smallest files), Medium = CRF 28 (default, balanced), High = CRF 23 (best quality). Audio is re-encoded to AAC 128k. Screen recordings and slide-style content compress dramatically.
How To Use Compress Offline
- Open Compress — Under Video Tools, or search "compress video" with ⌘/Ctrl+K.
- Drop the videos — Drag in a batch — a few ffmpeg jobs run in parallel, tracked by the background task bar.
- Pick a quality level — Low for the smallest files, High to preserve detail, Medium for the balance most people want.
- Check the result cards — Each file reports its size before and after, and the percent saved.
Why Use 1FileTool Over Online Tools?
- 100% offline — Files never leave your computer. No uploads, ever.
- Pay once — One-time payment from $29. No monthly subscriptions.
- Instant results — Local processing is faster than uploading + server processing + downloading.
- No file size limits — Process files of any size, limited only by your disk space.
- GDPR compliant — No data collection means complete privacy compliance by design.
Formats
| Input | Output | Notes |
|---|---|---|
| .mp4 .mov .mkv .webm … | .mp4 (H.264 + AAC) | WebM output via Convert uses VP8/Opus instead. |
Good to know
- Compression is lossy — Low trades visible quality for the smallest size.
- Replace source is ON by default; turn it off in Settings › General to keep the original video.
- The free plan processes 8 files per calendar day.
Tips
- Screen recordings compress the most — they re-encode beautifully at Medium or even Low.
- Start with Medium; only go Low when a size limit forces it.
- For a quick share clip, Trim to the moment first, then compress — shortest in, fastest out.
Frequently asked questions
How much smaller will a video get?
It varies by content — screen recordings and flat-color video shrink far more than noisy handheld footage. Each result reports its real before/after numbers.
Does it reduce quality?
Yes — it is H.264 re-encoding. High (CRF 23) stays close to the source; Low (CRF 35) is visibly softer but much smaller.
What codec does it use?
H.264 (libx264) with preset medium, and the audio re-encodes to AAC at 128 kbps — universally playable.
Is the video uploaded anywhere?
No — ffmpeg runs entirely on your device.