Shrinking a video file shouldn’t mean uploading it to a stranger’s server. Tellers’ free video compression tool runs entirely in your browser: your file never leaves your device, no account is required, and there’s no watermark on the output.
How In-Browser Video Compression Works
The compressor runs on your CPU using a client-side media processing engine. When you drop a video into the tool, all encoding happens locally — your browser processes the file and produces a compressed MP4. Nothing is transmitted to any server at any point.
Output is always H.264 MP4, which has the widest compatibility across devices, platforms, and video players.
Supported input formats: MP4, MOV, and WebM.
How to Compress a Video
- Open tellers.ai/free-standalone-tools/compress-video in any modern browser — no sign-in, no extension to install.
- Drop your video file onto the upload area, or click to browse.
- Choose a compression level: Low, Medium, or High.
- Click Compress and wait while the browser encodes the file.
- Download the compressed MP4.
No email required. No account created.
Choosing a Compression Level
The tool offers three presets, each targeting a different output bitrate:
| Level | Video bitrate | Audio bitrate | Best for |
|---|---|---|---|
| Low | 4 Mbps | 128 kbps | Preserving quality; moderate size reduction |
| Medium | 2 Mbps | 96 kbps | Balanced — good default for most use cases |
| High | 800 kbps | 64 kbps | Maximum file size reduction |
Medium is the default. It works well for social media uploads, email attachments, and web embeds. Choose Low for footage with fine detail — screen recordings, high-motion video — where quality loss is more noticeable.
When You’d Actually Use This
- Before sending via Slack, email, or WeTransfer: most services cap file size; Medium compression usually gets under the limit.
- Before uploading to a CMS or website: smaller files mean faster page loads without server-side re-encoding.
- Before sharing a draft for review: reviewers rarely need the full-resolution source.
- When privacy matters: sensitive footage, proprietary demos, or footage of people never leaves your machine.
Does this tool work on mobile?
Yes. It runs in any modern browser, including Safari on iOS and Chrome on Android. Compression speed depends on your device's CPU.
Will the output always be MP4?
Yes. Regardless of input format — MP4, MOV, or WebM — the output is always an H.264 MP4 file.
Does Tellers store my video?
No. Processing is entirely on-device. Tellers does not receive, store, or process your file at any point.
Is there a file size limit?
The tool itself imposes no hard limit. Very large files may be slow to process depending on your hardware.
Is this really free?
Yes, with no strings attached. No account, no trial period, no watermark.
The compression tool is one of several free browser-based utilities at tellers.ai. If you need AI-powered video creation, editing, or automation — generation from text or audio, timeline editing, API access, and more — the full Tellers platform is one step up.