🎬Video ToolkitAI
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Merge Videos Online — Concat Multiple MP4 Into 1 Free

Merge multiple videos (up to 10 files) into 1 MP4 with drag reorder. Server FFmpeg concat with re-encode to handle codec mismatch. No watermark.

Max 10 filesDrag reorderRe-encodeNo watermark
📁

Drag & drop file here or click to choose (max 10 file)

Đã chọn 0/10 file · Tổng tối đa 1 GB

Re-encode H.264 + AAC để handle codec khác nhau. Mất 1-3 phút tuỳ tổng size.

Why use this tool

🎬
Merge 10 videos in 1 click

Upload several files, drag to order, click Merge. Server concatenates into 1 seamless MP4.

🔄
Handles codec mismatch

Re-encodes everything to H.264 + AAC standard for clean concat (unlike simple concat that fails on codec mismatch).

🆓
Free + no watermark

Unlimited merges, no watermark on output.

How to use

  1. 1Upload 2-10 videos.
  2. 2Drag to reorder.
  3. 3Click Merge. Server processes 1-3 min.
  4. 4Download merged MP4.

Merge videos best practices

Concat 2 videos with same codec is simple via FFmpeg concat demuxer. Different codec/resolution requires re-encoding. Tool auto-detects and picks the right pipeline.

Recommendation: same resolution + frame rate for smooth output. Different resolutions scale to the smallest one.

  • ✓Concat 2-10 files
  • ✓Drag reorder
  • ✓Re-encode H.264 + AAC
  • ✓Auto-scale resolution
  • ✓Server FFmpeg
  • ✓No watermark

FAQ

Total size limit for 10 files?

Max ~1 GB total. Beyond that, compress each file first then merge.

Can I add transitions?

Phase 1 straight concat only. Phase 2 will add crossfade/dissolve transitions.

Audio loudness mismatch?

Phase 1 preserves as-is. Phase 2 will auto-loudnorm.