Chidimeru — Video Compressor
Compress video files directly in your browser. No upload required, completely free. Supports MP4, MOV, WebM, and AVI.
Drop Video File Here
or click to select
MP4, MOV, WebM, AVI supported
Preview
Target Size
Compression Complete
Update Info
Added a progress indicator for the first-time FFmpeg core download.
Fixed an issue so that setting the trim start point in the middle of the video now exports correctly.
Fixed an issue where the exported file could significantly exceed the target size you specified.
Fixed the export progress (%) so it now advances all the way to completion instead of stalling partway.
The preview now pauses automatically when you start exporting while it is still playing.
If you find any bugs or issues, please contact us here.
How to Use
Select Video File
Drag and drop a video file, or click to select. Supports MP4, MOV, WebM, and AVI formats.
Set Trim Range (Optional)
Extract only the parts you need. Use the slider or time inputs to set start and end positions.
Select Target Size
Choose from presets like 3MB, 8MB (Discord Free), 16MB (SNS), or specify a custom size.
Start Compression
Click "Export Video". All processing is done in your browser - no server uploads.
Download
Once complete, click the download button to save the MP4 file.
FAQ
Is it really free?
Yes, completely free. No registration required.
Are videos uploaded to a server?
No, video files are not uploaded. All processing happens in your browser, protecting your privacy.
What video formats are supported?
MP4, MOV, WebM, AVI and other common formats. Output is always MP4.
What is the output resolution?
Original aspect ratio is preserved. Only videos exceeding 1920px on the longest side are scaled down (e.g., 4K→Full HD).
Processing takes a long time
Processing time depends on video length and file size. First-time FFmpeg loading (~31MB) may take longer. Stable internet recommended.
Does it work on smartphones?
Yes, works on mobile browsers. However, PC is recommended for large files.
What about quality after compression?
Quality depends on target size and video length. Check "Estimated Bitrate" and "Quality Estimate" for guidance.
Recommended size for sending videos on Discord?
Discord free accounts support up to 10MB, Nitro Basic 50MB, and Nitro 500MB uploads. Chidimeru lets you specify a target size, making it easy to compress videos to fit Discord limits like "under 10MB" or "under 25MB".
Can I convert from formats other than MP4 (MOV / WebM / AVI)?
Yes, common formats like MOV, WebM, and AVI are supported as input. The output is always MP4 for maximum compatibility across players and platforms.
Can I reduce video resolution to shrink file size?
Yes. If the source video has a long side larger than 1920px, it is automatically scaled down to 1920px (Full HD). Lower-resolution videos keep their original resolution while bitrate is reduced for smaller files.
Tips for shrinking video size while keeping quality?
(1) Trim the video to only the parts you need. (2) Set the target size so the "Estimated Bitrate" stays above 400kbps. (3) Scenes with less motion compress more efficiently.
How is Chidimeru different from other video compression sites?
Chidimeru (1) processes files entirely in your browser without uploading to a server—better privacy, (2) requires no signup or login, (3) is completely free with no paid plans, and (4) makes results predictable thanks to target-size specification.
Things to know about using a free, no-signup, browser-only video compressor
Browser-only processing protects your privacy
Video files are never sent to a server. Processing runs inside your browser using WebAssembly (FFmpeg.wasm), so files stay on your device. Safe even for confidential or private videos.
Supports MP4, MOV, WebM, and AVI
Common video formats can be loaded directly in your browser. Output is always MP4 (H.264 + AAC), ensuring maximum compatibility across iPhone, Android, Windows, Mac, and all major social platforms.
Optimal sizes for Discord / Slack / Email
Discord free supports up to 10MB, Discord Nitro Basic 50MB, and email attachments typically up to 25MB. Use target-size specification to easily compress within each platform's limit.
Works on PC and smartphones, any OS
Runs in modern browsers (Chrome / Edge / Safari / Firefox) on Windows, Mac, iPhone, and Android with no install required. PCs are recommended for longer or higher-resolution videos.
How it differs from other video compression sites
Most video compression services rely on server uploads, require signup, or offer paid plans. Chidimeru is local-processing, no-signup, and completely free, giving you privacy and zero cost.