Video Compression
Compress your videos to reduce file size. Max file size: 250MB
Video Compressor
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Maximum file size: 250MB • Files: 0 / 1
Accepted format: video files
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Upload and compress video files to see them appear here for download.
Compress video files to dramatically reduce file size while controlling quality with H.264 or H.265 encoding. This browser-based video compressor uses FFmpeg-WASM with a CRF quality slider and speed presets — all processed locally with no server uploads.
Online Video Compressor — H.264 & H.265 Browser Encoding
Video files are often the largest assets in any project, and unnecessarily large video files increase storage costs, slow down uploads, and frustrate viewers with long load times. This browser-based video compressor solves that problem by applying H.264 or H.265 (HEVC) encoding to your video directly in the browser, achieving dramatic compression ratios while keeping visual quality under your control.
The Constant Rate Factor (CRF) quality slider is the primary quality control. A lower CRF value produces higher quality with larger file size; a higher CRF produces smaller files at the cost of some visual detail. H.265 (HEVC) encoding delivers up to 50% better compression than H.264 at the same quality level, making it ideal when minimizing file size is the priority. Speed presets (ultrafast through veryslow) let you trade encoding time for compression efficiency — slower presets achieve smaller files for the same quality setting.
With FFmpeg-WASM powering the compression pipeline, every encoding operation runs on your local CPU inside the browser. No video data is sent to a server, making this compressor completely private. It is ideal for compressing recordings before sharing via email, reducing assets for web delivery, or preparing videos for platforms with strict file size limits.
Reducing Video Size for Email Attachments
Compress large MP4 recordings to meet email attachment limits (typically 25 MB) without switching to a file sharing service.
Optimizing Videos for Web Delivery
Reduce video bitrate and file size before embedding on a website to improve page load speed and reduce CDN bandwidth costs.
Preparing Videos for Upload Platforms
Compress video to fit within platform file size restrictions for Twitter, LinkedIn, Discord, or other services that cap video upload size.
- 1
Upload Your Video File
Drag and drop or select your MP4, MOV, WebM, or MKV video. The file is loaded directly into your browser — no network transfer happens at this stage.
- 2
Select Codec and Quality
Choose H.264 for maximum compatibility or H.265 for 50% better compression. Adjust the CRF slider to balance quality versus file size reduction.
- 3
Choose an Encoding Preset
Select a speed preset from ultrafast to slow. Slower presets produce smaller files for the same CRF but take longer. Medium is a good default for most use cases.
- 4
Compress and Download
Start the compression and download the output file when FFmpeg-WASM finishes. Compare the before and after file sizes to confirm the compression ratio achieved.
H.264 and H.265 (HEVC) Codec Options
Choose H.264 for universal device compatibility or H.265 for up to 50% better compression at the same quality — ideal for storage-constrained workflows.
CRF Quality Slider
The Constant Rate Factor slider gives precise control over the quality-vs-size tradeoff. Lower values = higher quality; higher values = smaller files.
Speed vs. Quality Presets
Select encoding presets from ultrafast to slow to balance encoding time with compression efficiency depending on your time and size requirements.
No Upload — Full Privacy
All H.264 and H.265 encoding is performed by FFmpeg-WASM in your browser. Your video files are never transmitted over the network.
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