Compress Video for WeChat
Compress video for WeChat to fit Moments' 100MB limit or the tighter 25MB direct-message cap. H.264 MP4, no upload, no watermark, runs in your browser.
Official platform specifications
Default compression settings target these specs to avoid the platform re-encoding your upload.
Notes & gotchas
- •Bitrate: target ~4 Mbps for Moments to match WeChat's re-encoder.
- •Audio: AAC, 128 kbps stereo, 48 kHz.
- •Avoid H.265/HEVC and VP9 — WeChat re-encodes them with quality loss.
- •Frame rate: 30 fps constant (VFR causes audio drift).
- •Moments auto-loop: design first 1-2 seconds to flow into the last.
- •Channels uploads: include high-quality cover image (first frame matters).
Recommended FFmpeg settings
Need to compress video for WeChat (微信) before posting? China's dominant messaging and social platform has over 1.3 billion monthly active users. WeChat Moments (朋友圈) accepts videos up to 100 MB after a 2022 update from the previous 25 MB cap — but the platform still applies aggressive server-side re-encoding to any upload above ~25 MB, often crushing bitrate to 1-2 Mbps with visible blocking artifacts. Direct messages still cap around 25 MB before triggering re-encoding. H.264 + AAC in MP4 is the only fully-supported container/codec combo across all WeChat clients. Pre-compressing locally means your video reaches recipients at the quality you exported, not at WeChat's bandwidth-optimized quality.
- 1Pre-compressing to ~4 Mbps means WeChat's re-encoder recognizes the file as already-compliant and applies minimal additional compression.
- 2H.264 + AAC in MP4 is the only fully-compatible combo across all WeChat clients.
- 3Local processing keeps raw footage on your device — important for personal content, business Confidential recordings, and content under NDA.
- 4The tool runs entirely in the browser — works without VPN. WeChat itself may apply regional rules to uploads, but the compression step happens on your device.
- 5Pre-compression saves mobile data costs. Uploading a 500 MB raw file over Chinese mobile data costs real money on metered plans; pre-compressing to 100 MB cuts the upload cost 80%.
- 6WeChat Business/Moments ads have stricter quality floors than organic posts — pre-compression ensures you clear them without rejection.
Three steps, no account needed
From raw footage to shareable MP4 in seconds — all in your browser.
Upload your video
Drag-and-drop or click to browse. Files are processed locally — nothing is uploaded to any server.
Pick quality
Use the recommended preset or fine-tune CRF / resolution in advanced settings.
Download
Compression runs entirely in your browser. Grab your smaller MP4 in seconds — no account, no watermark.
Why people choose this compressor
Built for everyday use — fast, private, and free forever.
100% Browser-Based
Your video never leaves your device. No upload, no server-side processing, no privacy concerns.
No Watermark
Output is clean H.264 MP4 — no logos, no overlays, no time limits baked in.
Free & Unlimited
No sign-up, no credit card, no daily cap. Compress as many videos as you need.
Fast FFmpeg Engine
Powered by FFmpeg compiled to WebAssembly — the same engine professionals use, now in your browser.
Universal MP4 Output
Output is H.264 + AAC in an MP4 container — plays everywhere, uploads everywhere.
Cross-Platform
Works on Windows, macOS, Linux, iOS, and Android — any modern browser.
Who uses this tool
Moments Posters
Fit personal life updates under 100 MB so they upload instantly to Moments and play inline for all contacts. Slow uploads often get abandoned — pre-compression ensures immediate posting.
Official Accounts
Ship marketing videos through WeChat Official Account messages. These have stricter quality floors than organic Moments and benefit from pre-compression to spec.
Mini Program Videos
Embed product demos and tutorials in WeChat Mini Programs. Mini Program video assets should be pre-compressed for fast loading on China's mixed mobile networks.
Cross-Border Family
Share videos with family in China without relying on YouTube (blocked) or Dropbox (slow from China). WeChat is the universal channel — pre-compression ensures delivery.
Business Communication
Compress internal training and product videos before sharing via WeChat Work (企业微信). Smaller files sync faster and avoid corporate bandwidth throttling.
E-commerce Live
Pre-compress product showcase videos for WeChat Channels (视频号) uploads. The algorithm favors spec-compliant uploads that don't require heavy re-encoding.
Frequently asked questions
Two distinct limits: Moments (朋友圈) raised to 100 MB in 2022 from the previous 25 MB cap. Direct messages still cap around 25 MB before aggressive re-encoding kicks in. WeChat Channels (视频号) allows longer videos but applies the same compression strategy. This WeChat video compressor targets 100 MB by default for Moments, which is the most common sharing use case.
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