Scribeify

Compress Video Online — Free, No Upload

Shrink MP4, MOV, AVI, WebM files up to 80% smaller while keeping great visual quality. Your video never leaves your browser.

How to use Compress Video Online — Free, No Upload in 3 steps

  1. 1

    Choose your video

    Drag and drop or browse for the file you want to compress. Supported formats: MP4, MOV, AVI, MKV, WebM up to 2 GB.

  2. 2

    Pick compression level

    Select Light, Balanced, or Aggressive. Balanced is recommended for most cases — about 60% smaller with near-original quality.

  3. 3

    Download the result

    Compression runs in your browser using WebAssembly. Preview before downloading, no watermark, no email required.

Why choose Compress Video Online — Free, No Upload

  • Private by design

    Files never upload to a server. All processing happens in your browser using FFmpeg compiled to WebAssembly.

  • Instant result

    No queue, no waiting. Processing starts the moment you pick your file and uses your device’s full CPU.

  • Three quality presets

    Choose the best balance for your use case — social media, archival, or email attachment.

  • Supports major formats

    Handles MP4, MOV, AVI, MKV, WebM, and more, at resolutions up to 4K.

  • Completely free

    No sign-up, no trial, no watermark. Use it as many times as you want.

Who uses Compress Video Online — Free, No Upload

  • Social media uploads

    Instagram, TikTok, and WhatsApp limit video size. Compress first so your clip uploads fast without quality loss.

  • Email attachments

    Gmail and Outlook cap attachments around 25 MB. Fit a meeting recording or family video under the limit in seconds.

  • Free up storage

    Clear space on your phone or laptop. Compressing old recordings can save gigabytes without losing watchable quality.

  • Slide deck demos

    Smaller files keep PowerPoint and Keynote decks lightweight and easy to email or share via cloud links.

Trusted by creators worldwide

4.8 / 5 based on 1,200+ users

Frequently asked questions

Is this video compressor really free?
Yes, unlimited and with no watermark. There is no sign-up, no trial, no paid tier required to use it. We do not store or transmit your files.
Do my videos get uploaded to a server?
No. All compression runs locally in your web browser using FFmpeg.wasm. Your video stays on your device.
What formats does it support?
MP4, MOV, AVI, MKV, WebM, FLV, and WMV for input. Output is always MP4 (H.264) which plays everywhere.
How much can the file size be reduced?
Depending on the preset, typically 40% to 80%. Aggressive compression can reach 90% for large source files with low motion content.
Will quality get worse?
The Balanced preset aims for near-visually-lossless output. You can always preview before downloading. Aggressive compression trades quality for size and is best for quick previews or bandwidth-limited viewers.
Is there a size limit?
Technically up to 2 GB per file, though performance depends on your device’s RAM. For very large files, consider splitting them first or running on a desktop.
Does it work on mobile?
Yes, on modern iOS Safari 16+ and Android Chrome. Performance is slower than on desktop but works for short clips.

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