Chapter Marker Tools
client-side only
Reads chapter markers embedded in an
.mp4
and let you edit and re-export.
?
Download Tool
MP4 video
Read chapters
Clear
Select an MP4 to begin.
Tab (recommended)
Comma
Download CSV
Download XML
Download JSX
MediaStudio
Copy CSV
Video Preview & Marker Editor
Add Chapter Marker at Current Time
Update:
Go to in list ↓
00;00;00;00
← Prev
Next →
-10s
-5s
+5s
+10s
-1 Frame
+1 Frame
Current Frame Preview:
✕ Close
Previous Frame
Move chapter to this frame
Current Chapter Frame
Move chapter to this frame
Following Frame
Move chapter to this frame
✕ Close
⌨️ Keyboard Shortcuts
Space
Toggle Play / Pause
← Arrow Left
Step backward 1 frame
→ Arrow Right
Step forward 1 frame
← + Shift
Seek backward 5 seconds
→ + Shift
Seek forward 5 seconds
↑ Arrow Up / [
Select previous active chapter
↓ Arrow Down / ]
Select next active chapter
M
Add chapter marker at current time
Enter
Open lightbox for selected chapter
Esc
Close the lightbox
💡 Tip: Click on any chapter thumbnail to open its lightbox
Detected Chapters
If your chapter titles are missing, the tool will auto-name them as “§ 1”, “§ 2”, ...
#
Thumbnail
Title
Start (seconds)
Timecode
Source
Action
No chapters loaded yet.